K+H KPA 2290 User manual

Operating Manual
KPA 2220
KPA 2290
KPA 2400
Part Number: 528393
Version: 02
Date: 3-Jun-2009
Language: English, Française, Deutsch, Español
KPA Series
High Power Amplifier

Table of Contents
Introduction............................................................................................................................................................................... 5
Package Contents ..........................................................................................................................................................................5
More sound and less weight........................................................................................................................................................5
Superior Sound-Sonic Accuracy ..................................................................................................................................................5
Totally Digital with High Reliability............................................................................................................................................5
The Best Amplifier for Your Mains..............................................................................................................................................6
The KPA Series................................................................................................................................................................................6
Fully Featured Amplifier Range...................................................................................................................................................6
Installation and operation....................................................................................................................................................... 7
Unpacking .......................................................................................................................................................................................7
Mounting.........................................................................................................................................................................................7
Operating Precautions ..................................................................................................................................................................8
AC Mains connections ...................................................................................................................................................................8
Connecting Analog Inputs............................................................................................................................................................9
Connecting K8 Inputs..................................................................................................................................................................10
Connecting Outputs.....................................................................................................................................................................11
Connecting Remote Control .......................................................................................................................................................11
Setup and settings..................................................................................................................................................................12
Introduction..................................................................................................................................................................................12
The main screen...........................................................................................................................................................................12
The main menu ............................................................................................................................................................................13
Output attenuation.....................................................................................................................................................................14
Input Sensitivity...........................................................................................................................................................................14
Input select ...................................................................................................................................................................................14
Max output voltage.....................................................................................................................................................................15
Max mains current.......................................................................................................................................................................15
Clip limiter CH1 - CH2 ..................................................................................................................................................................15
Gate CH1 - CH2 .............................................................................................................................................................................15
Mute at power on ........................................................................................................................................................................15
Idle Mode.......................................................................................................................................................................................16
DSP Settings .................................................................................................................................................................................16
Bar meters.....................................................................................................................................................................................16
Output meters..............................................................................................................................................................................16
Temperature.................................................................................................................................................................................16
Mains meters................................................................................................................................................................................16
Amplifier Name ............................................................................................................................................................................17
Local preset...................................................................................................................................................................................17
Hardware info...............................................................................................................................................................................18
Hardware monitor .......................................................................................................................................................................19
LCD contrast..................................................................................................................................................................................19
Set keylock code ..........................................................................................................................................................................19
Menu locking ................................................................................................................................................................................19
Service............................................................................................................................................................................................20
The Smartcard function..............................................................................................................................................................20
Protection.................................................................................................................................................................................21
Turn-On/Turn-Off muting..........................................................................................................................................................21
Short circuit protection...............................................................................................................................................................21
Thermal protection......................................................................................................................................................................21
DC fault protection ......................................................................................................................................................................21
Input/Output protection ............................................................................................................................................................21
User maintenance...................................................................................................................................................................21
Cleaning.........................................................................................................................................................................................21
Removing Front Cover ................................................................................................................................................................21
Error Codes....................................................................................................................................................................................22
Guarantee.................................................................................................................................................................................22
EC Declaration of Conformity ................................................................................................................................................22
Technical notes........................................................................................................................................................................23
General Dimension.......................................................................................................................................................................23
Block diagram...............................................................................................................................................................................24
Technical specifications..............................................................................................................................................................25
Features.........................................................................................................................................................................................25
Safety and Warnings..............................................................................................................................................................26

Table des matières
Introduction.............................................................................................................................................................................27
Contenu du carton.......................................................................................................................................................................27
Plus de son, moins de poids.......................................................................................................................................................27
Une meilleure précision sonore.................................................................................................................................................27
Totalement numérique, haute fiabilité....................................................................................................................................27
Le meilleur amplificateur pour votre ligne secteur ...............................................................................................................28
La gamme KPA .............................................................................................................................................................................28
Une gamme d’amplificateurs offrant de nombreuses fonctions........................................................................................28
Installation et mise en service ..............................................................................................................................................29
Déballage.......................................................................................................................................................................................29
Installation et mise en place......................................................................................................................................................29
Précautions d’utilisation ............................................................................................................................................................30
Branchement secteur..................................................................................................................................................................30
Branchement des entrées analogiques ...................................................................................................................................31
Utilisation des entrées K8..........................................................................................................................................................32
Branchement des sorties............................................................................................................................................................33
Fonctions de télécommande......................................................................................................................................................33
Configuration et réglages......................................................................................................................................................34
Introduction..................................................................................................................................................................................34
L’écran principal...........................................................................................................................................................................34
Le menu principal ........................................................................................................................................................................35
Atténuation de sortie (Output atténuation)..........................................................................................................................36
Sensibilité d’entrée (Input Sensitivity) ...................................................................................................................................36
Sélection d’entrée (Input select) ..............................................................................................................................................36
Tension de sortie maximale (Max output voltage)...............................................................................................................37
Intensité secteur maximale (Max mains current) .................................................................................................................37
Limiteur de crête (Clip limiter) CH1 - CH2...............................................................................................................................37
Gate CH1 - CH2 .............................................................................................................................................................................37
Mute at power on ........................................................................................................................................................................38
Idle Mode.......................................................................................................................................................................................38
DSP Settings .................................................................................................................................................................................38
Bar meters.....................................................................................................................................................................................38
Output meters..............................................................................................................................................................................38
Temperature.................................................................................................................................................................................38
Mains meters................................................................................................................................................................................39
Affichage du nom de l’amplificateur .......................................................................................................................................39
Gestion des Presets dans la mémoire interne........................................................................................................................39
Hardware info...............................................................................................................................................................................40
Hardware monitor .......................................................................................................................................................................41
LCD Contrast .................................................................................................................................................................................41
Set keylock Code..........................................................................................................................................................................41
Verrouillage du menu..................................................................................................................................................................41
Service............................................................................................................................................................................................42
Fonctions relatives à la SmartCard...........................................................................................................................................42
Protection.................................................................................................................................................................................43
Mute à la mise sous tension/hors tension..............................................................................................................................43
Protection contre les courts-circuits ........................................................................................................................................43
Protection thermique..................................................................................................................................................................43
Protection composante continue..............................................................................................................................................43
Protection RF en entrée et en sortie ........................................................................................................................................43
Maintenance Utilisateur.........................................................................................................................................................43
Nettoyage .....................................................................................................................................................................................43
Démontage de la face avant......................................................................................................................................................43
Codes d’erreur ..............................................................................................................................................................................44
Garantie....................................................................................................................................................................................44
Déclaration de Conformité CE................................................................................................................................................44
Données techniques ...............................................................................................................................................................45
Dimensions générales.................................................................................................................................................................45
Synoptiques audio et alimentation..........................................................................................................................................46
Caractéristiques techniques ......................................................................................................................................................47
Caractéristiques ...........................................................................................................................................................................47
Sécurité et Avertissements ...................................................................................................................................................48

Inhaltsverzeichnis
Einleitung.................................................................................................................................................................................49
Lieferumfang................................................................................................................................................................................49
Mehr Klang und weniger Gewicht.............................................................................................................................................49
Hervorragender Klang – Akustische Präzision.......................................................................................................................49
Total digital bei hoher Zuverlässigkeit....................................................................................................................................49
Der beste Verstärker für Ihre Anwendung..............................................................................................................................50
Die KPA-Serie................................................................................................................................................................................50
Voll ausgestattete Verstärkerpalette ......................................................................................................................................50
Installation und Bedienung ...................................................................................................................................................51
Auspacken.....................................................................................................................................................................................51
Montage ........................................................................................................................................................................................51
Vorsichtsmaßnahmen beim Betrieb.........................................................................................................................................52
Netzanschluss ..............................................................................................................................................................................52
Analogeingänge anschließen ....................................................................................................................................................53
K8-Eingänge anschließen...........................................................................................................................................................54
Ausgänge anschließen................................................................................................................................................................55
Fernsteuerfunktion .....................................................................................................................................................................55
Einrichtung und Einstellungen..............................................................................................................................................56
Einleitung ......................................................................................................................................................................................56
Der Hauptbildschirm ...................................................................................................................................................................56
Das Hauptmenü ...........................................................................................................................................................................57
Output Attenuation / Ausgangsbedämpfung .......................................................................................................................58
Input Sensitivity / Eingangsempfindlichkeit..........................................................................................................................58
Input Select / Eingangswahl......................................................................................................................................................58
Max Output Voltage / Maximale Ausgangsspannung..........................................................................................................59
Max Mains Current / Maximaler Netzstrom............................................................................................................................59
Clip Limiter CH1 - CH2 / Clip Limiter Kanal 1 – Kanal 2.........................................................................................................59
Gate CH1 - CH2 / Gate Kanal 1 – Kanal 2 ................................................................................................................................59
Mute at power on / Stummschaltung beim Einschalten......................................................................................................60
Idle Mode / Leerlauf ....................................................................................................................................................................60
DSP Settings / DSP-Einstellungen ............................................................................................................................................60
Bar Meters / Balkenanzeigen ....................................................................................................................................................60
Output Meters / Ausgangsanzeigen........................................................................................................................................60
Temperature / Temperatur........................................................................................................................................................60
Mains Meters / Netzanzeigen ...................................................................................................................................................61
Amplifier Name / Verstärkername...........................................................................................................................................61
Local Preset / Lokale Presets.....................................................................................................................................................61
Hardware Info / Hardware-Info ...............................................................................................................................................62
Hardware Monitor / Hardware-Monitor..................................................................................................................................63
LCD Contrast / LCD-Kontrast .....................................................................................................................................................63
Set Keylock Code / Keylock Code einstellen............................................................................................................................63
Menu locking / Menü sperren....................................................................................................................................................63
Service / Wartung........................................................................................................................................................................64
Die Smartcard-Funktion .............................................................................................................................................................64
Schutz.......................................................................................................................................................................................65
Stummschaltung beim Ein-/Ausschalten ...............................................................................................................................65
Schutz vor Kurzschlüssen...........................................................................................................................................................65
Schutz vor Überhitzung..............................................................................................................................................................65
Schutz vor Gleichspannungsfehlern.........................................................................................................................................65
Schutz der Ein/Ausgänge...........................................................................................................................................................65
Wartung durch den Nutzer....................................................................................................................................................65
Reinigung......................................................................................................................................................................................65
Frontseite entfernen...................................................................................................................................................................65
Fehlercodes...................................................................................................................................................................................66
Garantie....................................................................................................................................................................................66
Konformitätserklärung ..........................................................................................................................................................66
Technische Hinweise...............................................................................................................................................................67
Allgemeine Abmessungen .........................................................................................................................................................67
Blockdiagramm ............................................................................................................................................................................68
Technische Daten.........................................................................................................................................................................69
Leistungsmerkmale.....................................................................................................................................................................69
Sicherheit und Warnhinweise ...............................................................................................................................................70

Índice
Introducción.............................................................................................................................................................................71
Contenido del paquete................................................................................................................................................................71
Más sonido con menos peso......................................................................................................................................................71
Sonido superior – perfección acústica .....................................................................................................................................71
Operación totalmente digital con un alto grado de confiabilidad......................................................................................71
El mejor amplificador para su equipo de sonido....................................................................................................................72
La serie KPA ..................................................................................................................................................................................72
Una amplia gama de amplificadores para todo tipo de situaciones..................................................................................72
Instalación y operación ..........................................................................................................................................................73
Para desempacar el producto....................................................................................................................................................73
Montaje..........................................................................................................................................................................................73
Cuidado..........................................................................................................................................................................................74
Conexión AC a la fuente de alimentación externa.................................................................................................................74
Conexión de las entradas analógicas.......................................................................................................................................75
Conexión de las entradas para el sistema K8.........................................................................................................................76
Conexión de las salidas...............................................................................................................................................................77
Conexión del control remoto .....................................................................................................................................................77
Ajustes y configuración..........................................................................................................................................................78
Introducción..................................................................................................................................................................................78
Pantalla principal.........................................................................................................................................................................78
Menú principal..............................................................................................................................................................................79
Output attenuation (atenuación de la salida) .......................................................................................................................80
Input Sensitivity (sensibilidad de entrada)............................................................................................................................80
Input select (modo de entrada)................................................................................................................................................80
Max output voltage (máximo voltaje de salida) ...................................................................................................................81
Max mains current (máxima corriente de entrada)..............................................................................................................81
Clip limiter CH1 - CH2 (limitador de clipping).........................................................................................................................81
Gate CH1 - CH2 (umbral de protección) ..................................................................................................................................81
Mute at power on (modo de silencio al encender la unidad)..............................................................................................82
Idle Mode (modo de reposo) .....................................................................................................................................................82
Funciones DSP ..............................................................................................................................................................................82
Medidores de barras....................................................................................................................................................................82
Medidores de salida ....................................................................................................................................................................82
Temperatura.................................................................................................................................................................................82
Medidores de la corriente externa............................................................................................................................................83
Nombre del amplificador............................................................................................................................................................83
Local presets (valores predeterminados) ...............................................................................................................................83
Información del hardware..........................................................................................................................................................84
Parámetros del sistema..............................................................................................................................................................85
Contraste de la pantalla LCD......................................................................................................................................................85
Código de activación ...................................................................................................................................................................85
Bloqueo de menús.......................................................................................................................................................................85
Servicio ..........................................................................................................................................................................................86
La función Smartcard..................................................................................................................................................................86
Sistemas de protección ..........................................................................................................................................................87
Silencio al encender y apagar la unidad..................................................................................................................................87
Protección contra cortocircuito .................................................................................................................................................87
Protección térmica.......................................................................................................................................................................87
Protección contra fallas en la señal de salida.........................................................................................................................87
Protección de entrada/salida ....................................................................................................................................................87
Mantenimiento........................................................................................................................................................................87
Limpieza ........................................................................................................................................................................................87
Quitando la cubierta frontal ......................................................................................................................................................87
Códigos de error...........................................................................................................................................................................88
Garantía....................................................................................................................................................................................88
Declaración de Conformidad CE ............................................................................................................................................88
Características físicas .............................................................................................................................................................89
Dimensiones .................................................................................................................................................................................89
Diagramas de conjunto...............................................................................................................................................................90
Especificaciones técnicas............................................................................................................................................................91
Características ..............................................................................................................................................................................91
Instrucciones de seguridad....................................................................................................................................................92

Klein + Hummel
Operating Manual KPA Series English 5
■Introduction
Thank-you for purchasing a Klein + Hummel KPA amplifier. Klein + Hummel amplifiers are designed to compliment
Klein + Hummel’s extensive range of Installed Sound equipment. No other amplifiers come close for applications
demanding high power and long term reliability. Thanks to amazing reductions in heat output along with
reductions in weight and the specific high output power, KPA amplifiers can be used in an unlimited range of
applications such as concert touring, opera houses, theatres, churches, cinema, theme parks, television sound
stages and industrial applications.
The KPA series amplifiers are fully compatible with all K8 digital audio distribution system input devices and may
be used to simply and easily create the highest quality, low noise audio connection without knowledge of
networking techniques.
Before reading the rest of this operating manual, review the safety and warnings. Note that imperial dimensions
are approximate.
Package Contents
The shipping carton contains:
•This operating manual
•The amplifier
•Product guarantee
•1 mains power cable (wire ends)
Features and accessories are listed at the end of this operating manual.
More sound and less weight
Compared to a conventional amplifier, Klein + Hummel KPA technology offers very high efficiency and delivers
more power to the loudspeakers with much reduced heat dissipation. This greater efficiency enables dimensions,
weight and power consumption to be reduced. The output stages of the amplifiers typically run at 95% efficiency,
dissipating only 5% of the input energy as heat.
One of the most interesting characteristics is that KPA’s efficiency is almost independent of output level.
Conventional amplifiers achieve their best efficiency only at full rated power output. Since standard music has an
average power density of 40% of the maximum level, conventional amplifiers can easily generate 10 times more
heat than KPA for the same volume of sound.
Superior Sound-Sonic Accuracy
Crystal-clear highs, and a tight, well-defined low end: the most accurate reproduction of an audio signal. Patented
design features ensure very high performance in parameters such as distortion, frequency response, slew rate,
power bandwidth and dumping factor.
Totally Digital with High Reliability
The KPA series is based on PWM technology that has been used for 30 years or more in power supplies and
inverters. PWM provides high reliability, small size, low weight and high efficiency. A PWM converter works as a
high frequency sampler, converting the variable amplitude (audio) signal into an impulse sequence with average
value equal to the audio input.
KPA amplifiers use very high sampling frequencies to obtain high performances across the audio band.

Klein + Hummel
Operating Manual KPA Series English 6
The Best Amplifier for Your Mains
The KPA series is fully Power Factor Corrected. This unique feature ensures that a predominantly resistive load is
presented to mains, minimizing current distortion and voltage/current displacement. This leads to much improved
performance of the amplifier at high levels of output and avoids mains-voltage collapses, typical of standard and
switching power supplies. Another great advantage of this technology is that its performance is, to a large extent,
independent of mains voltage. The rated output power does not vary with load/line conditions.
The KPA Series
KPA Series has many advanced features, digital control of many parameters, adjustable maximum mains
consumption, selectable digital presets and a graphic display that shows detailed information of the status of the
amplifier. You can appreciate the functionality of these and a lot of other features by reading this manual carefully.
Fully Featured Amplifier Range
KPA Series offers an extensive set of amplifier and load protection features and is designed to work under a wide
range of demanding conditions. It gives you unprecedented power and increased long-term reliability.

Klein + Hummel
Operating Manual KPA Series English 7
■Installation and operation
Unpacking
Carefully open the shipping carton and check for any noticeable damage; the
figure 1 below shows the exploded
view of the packing. Every Klein + Hummel amplifier is completely tested and inspected before leaving the factory
and should arrive in perfect condition. If you find any damage, notify the shipping company immediately. Be sure
to save the carton and all packing materials for the carrier’s inspection.
Mains cable
Manual
Amplifier
figure 1
Mounting
All KPA amplifiers are previewed for the standard 19” rack mounting; there are four front panels holes and four
rear lateral holes. The amplifiers must be fixed into rack in both sides, back and frontal, to avoid mechanical
damages. Your KPA amplifier uses a forced-air cooling system to maintain a low, even operating temperature.
Drawn by an internal fan, air enters through the slots in the front panel and courses over and through components.
The KPA series amplifiers feature an ”intelligent” variable-speed DC fan which is controlled by heat sink
temperature sensing circuits: the fan speed will increase only when the temperature of either heat sink requires it,
which keeps fan noise to a minimum and helps cut dust accumulation inside. Under extreme thermal load, the fan
will force a very large volume of air through the heat sinks. If either heat sink gets too hot, its sensing circuit will
reduce the output power. If the amplifier overheats, another sensing circuit shuts down its circuit to cut off power
until it cools to a safe temperature.

Klein + Hummel
Operating Manual KPA Series English 8
The exhaust cooling air is forced out through the rear of the chassis (
figure 2 ), so make sure there is enough space
around the sides of the amplifier to allow the air to escape. If it is rack mounted, make sure the exhaust air can flow
without resistance. If you are using a rack with closed backs, there must be at least one standard rack space of
opening in the front of the rack for every four amplifiers. Amplifiers may be stacked directly on top of each other
(no space needed between units), starting from the bottom of the rack.
figure 2
Operating Precautions
Make sure the AC mains voltage is correct and is the same as that printed on the rear of the amplifier. Damage
caused by connecting the amplifier to improper AC voltage is not covered by the warranty. Make sure the power
switch is off before making any input or output connections.
Whether you buy them or make them, use good-quality input and speaker cables. Most intermittent problems are
caused by faulty cables. Use good-quality connectors and wire, along with good soldering technique, to ensure
trouble free reliability.
AC Mains connections
The AC Main connection is made via the CPC type connector on the rear side of the panel. The
figure 3 below shows
the connection to the amplifier. Be sure that your AC mains power source has the requirements indicated in this
manual. The KPA amplifier has an automatic power factor correction system for a perfect mains network interface.
The amplifier is a resistive load for the mains network, minimizing the reactive power and the harmonic distortion
on the current. The system allows performance to be maintained even in circumstances of varying the mains
voltage.
It is important to connect the ground for safety, do not use adapters that disable the ground.
AC~ GND/ PEAC~
figure 3