HH Electronics SCALAR SR Series User manual

PROFESSIONAL POWER AMPLIFIER
WWW.HHELECTRONICS.COM

CONTENTS
Important Safety Instructions....................................................
Instructions Importantes De Securite - Français..................
Wichtige Sicherheitshinweise - Deusch..................................
Instrucciones Importantes Para Su Seguridad Español.........
Important Safety Instructions Pt 2............................................
Foreword.....................................................................................
Introduction..................................................................................
SR Series Front Panel...................................................................
SR Series Rear Panel....................................................................
SR Series Setup Connections.....................................................
Block Diagram...............................................................................
Specifications.................................................................................
Connector Wiring......................................................................
Notes.............................................................................................
USER MANUAL ISSUE:2
Reliability Protection Function..................................................
2
3
4
5
6
7
8
9
10 - 11
11 - 12
13
14
15
16
17 - 18

WARNING: When using electrical products, basic cautions should always be followed, including the following:
1. Read these instructions.
2. Keep these instructions safe.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with a dry cloth.
7. Do not block any of the ventilation openings. Install in accordance with manufacturer’s instructions.
8. Do not install near any heat sources such as radiators, heat registers, stoves or other apparatus (including
amplifiers) that produce heat.
9.An apparatus with Class I construction shall be connected to a mains socket outlet with a protective
connection. Do not defeat the safety purpose of the polarized or grounding-type plug.A polarized plug has two
blades with one wider than the other.A grounding type plug has two blades and a third grounding prong.The
wide blade or third prong is provided for your safety. If the provided plug does not fit into your outlet, consult
an electrician for replacement of the obsolete outlet.
10. Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles, and
the point they exit from the apparatus.
11. Only use attachments/accessories provided by the manufacturer.
12. Use only with a cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the
apparatus.When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from
tip-over.
13.The mains plug or appliance coupler is used as the disconnect device and shall remain readily operable. The
user should allow easy access to any mains plug, mains coupler and mains switch used in conjunction with this
unit thus making it readily operable. Unplug this apparatus during lightning storms or when unused for long
periods of time.
14. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged
in any way, such as when power-supply cord or plug is damaged, liquid has been spilled or objects have fallen
into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been
dropped.
15. Never break off the ground pin. Connect only to a power supply of the type marked on the unit adjacent to
the power supply cord.
16. If this product is to be mounted in an equipment rack, rear support should be provided.
17. Note for UK only: If the colours of the wires in the mains lead of this unit do not correspond with the
terminals in your plug‚ proceed as follows:
a) The wire that is coloured green and yellow must be connected to the terminal that is marked by the letter
E‚ the earth symbol‚ coloured green or
coloured green and yellow.
b) The wire that is coloured blue must be connected to the terminal that is marked with the letter N or the
colour black.
c) The wire that is coloured brown must be connected to the terminal that is marked with the letter L or
the colour red.
18.This electrical apparatus should not be exposed to dripping or splashing and care should be taken not to
place objects containing liquids, such as vases, upon the apparatus.
19. Exposure to extremely high noise levels may cause a permanent hearing loss. Individuals vary considerably in
susceptibility to noise-induced hearing loss, but nearly everyone will lose some hearing if exposed to sufficiently
intense noise for a sufficient time.
The U.S. Government’s Occupational Safety and Health Administration
(OSHA) has specified the following permissible noise level exposures:
According to OSHA, any exposure in excess of the above permissible
limits could result in some hearing loss. Earplugs or protectors to the
ear canals or over the ears must be worn when operating this
amplification system in order to prevent a permanent hearing loss, if
exposure is in excess of the limits as set forth above.To ensure against
potentially dangerous exposure to high sound pressure levels, it is
recommended that all persons exposed to equipment capable of
producing high sound pressure levels such as this amplification system
be protected by hearing protectors while this unit is in operation.
IMPORTANT SAFETY INSTRUCTIONS
Duration Per
Day in Hours
8
6
4
3
2
1 ½
1
½
¼ or less
Sound Level dBA,
slow response
90
92
95
97
100
102
105
110
115

ATTENTION: L’utilisation de tout appareil électrique doit être soumise aux precautions d’usage incluant:
1. Lire ces instructions
2. Gardez ce manuel pour de futures références.
3. Prétez attention aux messages de précautions de ce manuel.
4. Suivez ces instructions.
5. N’utilisez pas cette unité proche de plans d’eau.
6. N’utilisez qu’un tissu sec pour le nettoyage de votre unité.
7. N’obstruez pas les systèmes de refroidissement de votre unité et installez votre unité en fonction des
instructionsde ce manuel.
8. N'installez près d'aucune source de chaleur telle que des radiateurs, des registres de la chaleur, des fourneaux
ou d'autres appareils (amplificateurs y compris) cette chaleur de produit.
9. Un appareil avec la construction de la classe I sera relié à une sortie de douille de forces à un raccordement
protecteur. Ne défaites pas le but de sûreté de la polariser ou du fondre-type prise. Une prise polarisée a deux
lames avec une plus large que l'autre. Un type au sol prise a deux lames et une troisième prise fondante. La lame
large ou la troisième fourche est donnée pour votre sûreté. Si la prise fournie ne s'insère pas dans votre sortie,
consultez un électricien pour le remplacement de la sortie désuète.
10. Protégez les connecteurs de votre unité et positionnez les cablages pour éviter toutes déconnexions
accidentelles.
11. N’utilisez que des fixations approuvées par le fabriquant.
12. Lors de l’utilsation sur pied ou pole de support, assurez dans le cas de déplacement de l’ensemble
enceinte/support de prévenir tout basculement intempestif de celui-ci.
13. Les forces branchent ou le coupleur d'appareils est utilisé pendant que le dispositif de débranchement et
restera aisément fonctionnel. L'utilisateur devrait permettre l'accès facile à toutes les forces prise, à forces
coupleur et à commutateur de forces utilisé en même temps que cette unité le rendant de ce fait aisément
fonctionnel. Débranchez cet appareil pendant la foudre donne l' assaut à ou si inutilisé pendant de longues
périodes.
14. Seul un technicien agréé par le fabriquant est à même de réparer/contrôler votre unité. Celle-ci doit être
contrôlée si elle a subit des dommages de manipulation, d’utilisation ou de stockage (humidité,…).
15. Ne déconnectez jamais la prise de terre de votre unité.
16. Si votre unité est destinée a etre montée en rack, des supports arriere doivent etre utilises.
17. Note pour les Royaumes-Unis: Si les couleurs de connecteurs du cable d’alimentation ne correspond pas au
guide de la prise secteur, procédez comme suit:
a) Le connecteur vert et jaune doit être connectrer au terminal noté E, indiquant la prise de terre ou
correspondantaux couleurs verte ou verte et jaune du guide.
b) Le connecteur bleu doit être connectrer au terminal noté N, correspondnat à la couleur noire du guide.
c) Le connecteur marron doit être connectrer au terminal noté L, correspondant à la couleur rouge du guide.
18. Cet équipement électrique ne doit en aucun cas être en contact avec un quelconque liquide et aucun objet
contenant un liquide, vase ou autre ne devrait être posé sur celui-ci.
19. Une exposition à de hauts niveaux sonores peut conduire à des dommages de l’écoute irréversibles. La
susceptibilité au bruit varie considérablement d’un individu à l’autre, mais une large majorité de la population
expériencera une perte de l’écoute après une exposition à une forte puissance sonore pour une durée
prolongée.
L’organisme de la santé américaine (OSHA) a produit le guide ci-dessous en rapport à la perte occasionnée:
D’après les études menées par le OSHA, toute exposition au delà des limites décrites ce-dessus entrainera des
pertes de l’écoute chez la plupart des sujets. Le port de système de protection (casque, oreilette de filtrage,…)
doit être observé lors de l’opération cette unité ou des dommages irréversibles peuvent être occasionnés. Le
port de ces systèmes doit être observé par toutes personnes
susceptibles d’être exposées à des conditions au delà des limites
décrites ci-dessus. Durée par
Jour (heures)
inférieur
8
6
4
3
2
1 ½
1
½
¼ ou
INSTRUCTIONS IMPORTANTES DE SECURITE - FRANÇAIS
Niveau sonore
moyen (dBA)
90
92
95
97
100
102
105
110
115

ACHTUNG: Beim Einsatz von Elektrogeräten müssen u.a. grundlegendeVorsichtsmaßnahmen befolgt
werden:durch.
1. Lesen Sie sich diese Anweisungen
2. Bewahren Sie diese Anweisungen auf.
3. Beachten Sie alle Warnungen.
4. Befolgen Sie alle Anweisungen.
5. Setzen Sie dieses Gerät nicht in der Nähe von Wasser ein.
6. Reinigen Sie es nur mit einem trockenen Tuch.
7. Blockieren Sie keine der Lüftungsöffnungen. Führen Sie die Installation gemäß den Anweisungen des Herstellers
durch.
8. Installieren Sie das Gerät nicht neben Wärmequellen wie Heizungen, Heizgeräten, Öfen oder anderen Geräten
(auch Verstärkern), die Wärme erzeugen.
9. Ein Apparat mit Aufbau der Kategorie I wird an einen Hauptleitungseinfaßungsanschluß mit einem schützenden
Anschluss angeschlossen. Beeinträchtigen Sie nicht die Sicherheitswirkung des gepolten Steckers bzw. des
Erdungssteckers. Ein gepolter Stecker weistzwei Stifte auf, von denen einer breiter ist als der andere. Ein
Erdungsstecker weist zwei Stifte und einen dritten Erdungsstift auf.Der breite Stift bzw. der dritte Stift dient Ihrer
Sicherheit. Sollte der beiliegende Stecker nicht in Ihre Steckdose passen, wenden Sie sich bitte an einen Elektriker,
um die ungeeignete Steckdose austauschen zu lassen.
10. Schützen Sie das Netzkabel, sodass niemand darauf tritt oder es geknickt wird, insbesondere an Steckern oder
Buchsen und ihren Austrittsstellen aus dem Gerät.
11.Verwenden Sie nur die vom Hersteller erhältlichen Zubehörgeräte oder Zubehörteile.
12.Verwenden Sie nur einen Wagen, Stativ, Dreifuß,Träger oder Tisch, der den Angaben des Herstellers entspricht
oder zusammen mit dem Gerät verkauft wurde.Wird ein Wagen verwendet, bewegen Sie den Wagen mit dem
darauf befindlichen Gerät besonders vorsichtig, damit er nicht umkippt und möglicherweise jemand verletzt wird.
13. Die Hauptleitungen verstopfen, oder Gerätekoppler wird während die TrennungVorrichtung benutzt und wird
bereitwillig funktionell bleiben. Der Benutzer sollte einfachen Zugang zu allen möglichen Hauptleitungen Stecker,
zu den Hauptleitungen Koppler und zum Hauptleitungen Schalter erlauben, der in Verbindung mit dieser
Maßeinheit benutzt wird, die folglich ihn bereitwillig funktionell bildet.Trennen Sie diesen Apparat während der
Blitzstürme oder wenn unbenutzt, für lange Zeitabschnitte.
14. Lassen Sie sämtliche Wartungsarbeiten von qualifizierten Kundendiensttechnikern durchführen. Eine Wartung
ist erforderlich, wenn das Gerät in irgendeiner Art beschädigt wurde, etwa wenn das Netzkabel oder der
Netzstecker beschädigt wurden, Flüssigkeit oder Gegenstände in das Gerät gelangt sind, das Gerät Regen oder
Feuchtigkeit ausgesetzt wurde, nicht normal rbeitet oder heruntergefallen ist.
15.Der Erdungsstift darf nie entfernt werden. Schließen Sie nur an die Stromversorgung der Art an, die am Gerät
neben dem Netzkabel angegeben ist.
16.Wenn dieses Produkt in ein Geräte-Rack eingebaut werden soll, muss eine Versorgung über die Rückseite
eingerichtet werden.
17. Hinweis – Nur für Großbritannien: Sollte die Farbe der Drähte in der Netzleitung dieses Geräts nicht mit den
Klemmen in Ihrem Stecker übereinstimmen, gehen Sie folgendermaßen vor:
a) Der grün-gelbe Draht muss an die mit E (Symbol für Erde) markierte bzw. grüne oder grün-gelbe Klemme
angeschlossen werden.
b) Der blaue Draht muss an die mit N markierte bzw. schwarze Klemme angeschlossen werden.
c) Der braune Draht muss an die mit L markierte bzw. rote Klemme angeschlossen werden.
18. Dieses Gerät darf nicht ungeschützt Wassertropfen und Wasserspritzern ausgesetzt werden und es muss
darauf geachtet werden, dass keine mit Flüssigkeiten gefüllte Gegenstände, wie z. B. Blumenvasen, auf dem Gerät
abgestellt werden.
19. Belastung durch extrem hohe Lärmpegel kann zu dauerhaftem Gehörverlust führen. Die Anfälligkeit für durch
Lärm bedingten Gehörverlust ist von Mensch zu Mensch verschieden, das Gehör wird jedoch bei jedem in
gewissem Maße geschädigt, der über einen bestimmten Zeitraum ausreichend starkem Lärm ausgesetzt ist. Die
US-Arbeitsschutzbehörde (Occupational and Health Administration,
OSHA) hat die folgenden zulässigen Pegel für Lärmbelastung festgelegt:
Laut OSHA kann jede Belastung über den obenstehenden
zulässigen Grenzwerten zu einem gewissen Gehörverlust führen. Sollte
die Belastung die obenstehenden Grenzwerte übersteigen, müssen
beim Betrieb dieses Verstärkungssystems Ohrenstopfen oder
Schutzvorrichtungen im Gehörgang oder über den Ohren getragen
werden, um einen dauerhaften Gehörverlust zu verhindern. Um sich
vor einer möglicherweise gefährlichen Belastung durch hohe
Schalldruckpegel zu schützen, wird allen Personen empfohlen, die mit
Geräten arbeiten, die wie dieses Verstärkungssystem hohe
Schalldruckpegel erzeugen können, beim Betrieb dieses Geräts einen
Gehörschutz zu tragen.
Dauer pro
Tag in Stunden
8
6
4
3
2
1 ½
1
½
¼ oder weniger
Geräuschpegel dBA
langsame Reaktion
l
90
92
95
97
100
102
105
110
115
WICHTIGE SICHERHEITSHINWEISE - DEUSCH

CUIDADO: Cuando use productos electrónicos, debe tomar precauciones básicas, incluyendo las siguientes:
1. Lea estas instrucciones.
2. Guarde estas instrucciones.
3. Haga caso de todos los consejos.
4. Siga todas las instrucciones.
5. No usar este aparato cerca del agua.
6. Limpiar solamente con una tela seca.
7. No bloquear ninguna de las salidas de ventilación. Instalar de acuerdo a las instrucciones del fabricante.
8. No instalar cerca de ninguna fuente de calor como radiadores, estufas, hornos u otros aparatos (incluyendo
amplificadores) que produzcan calor.
9. Un aparato con la construcción de la clase I será conectado con un enchufe de zócalo de las cañerías con una
conexión protectora. No retire la patilla protectora del enchufe polarizado o de tipo “a Tierra”. Un enchufe
polarizado tiene dos puntas, una de ellas más ancha que la otra. Un enchufe de tipo “a Tierra” tiene dos puntas y
una tercera “a Tierra”. La punta ancha (la tercera ) se proporciona para su seguridad. Si el enchufe proporcionado
no encaja en su enchufe de red, consulte a un electricista para que reemplaze su enchufe obsoleto.
10. Proteja el cable de alimentación para que no sea pisado o pinchado, particularmente en los enchufes, huecos, y
los puntos que salen del aparato.
11. Usar solamente añadidos/accesorios proporcionados por el fabricante.
12. Usar solamente un carro, pie, trípode, o soporte especificado por el fabricante, o vendido junto al aparato.
Cuando se use un carro, tenga cuidado al mover el conjunto carro/aparato para evitar que se dañe en un vuelco. No
suspenda esta caja de ninguna manera
13. Las cañerías tapan o el acoplador de la aplicación se utiliza mientras que el dispositivo de la desconexión y
seguirá siendo fácilmente operable. El usuario debe permitir el acceso fácil a cualquier cañería enchufe, a las cañerías
acoplador y al interruptor de las cañerías usado conjuntamente con esta unidad así que lo hace fácilmente operable.
Desenchufe este aparato durante tormentas del relámpago o cuando es inusitado por períodos del tiempo largos.
14. Para cualquier reparación, acuda a personal de servicio cualificado. Se requieren reparaciones cuando el aparato
ha sido dañado de alguna manera, como cuando el cable de alimentación o el enchufe se han dañado, algún líquido
ha sido derramado o algún objeto ha caído dentro del aparato, el aparato ha sido expuesto a la lluvia o la humedad,
no funciona de manera normal, o ha sufrido una caída.
15. Nunca retire la patilla deTierra. Conecte el aparato sólo a una fuente de alimentación del tipo marcado al lado
del cable de alimentación.
16. Si este producto va a ser enracado con más equipo, use algún tipo de apoyo trasero.
17. Nota para el Reino Unido solamente: Si los colores de los cables en el enchufe principal de esta unidad no
corresponden con los terminales en su enchufe‚ proceda de la siguiente manera:
a) El cable de color verde y azul debe ser conectado al terminal que está marcado con la letra E‚ el símbolo de
Tierra (earth)‚ coloreado en verde o en
verde y amarillo.
b) El cable coloreado en azul debe ser conectado al terminal que está marcado con la letra N o el color negro.
c) El cable coloreado en marrón debe ser conectado al terminal que está marcado con la letra L o el color
rojo.
18. Este aparato eléctrico no debe ser sometido a ningún tipo de goteo o salpicadura y se debe tener cuidado para
no poner objetos que contengan líquidos, como vasos, sobre el aparato.
19. La exposición a altos niveles de ruido puede causar una pérdida permanente en la audición. La susceptibilidad a
la pérdida de audición provocada por el ruido varía segúnla persona, pero casi todo el mundo perderá algo de
audición si se expone a un nivel de ruido suficientemante intenso durante un tiempo determinado. El Departamento
para la Salud y para la Seguridad del Gobierno de los Estados Unidos (OSHA) ha especificado las siguientes
exposiciones al ruido permisibles:
De acuerdo al OSHA, cualquier exposición que exceda los límites
arriba indicados puede producir algún tipo de pérdida en la audición.
Protectores para los canales auditivos o tapones para los oídos deben
ser usados cuando se opere con este sistema de sonido para prevenir
una pérdida permanente en la audición, si la exposición excede los
límites indicados más arriba. Para protegerse de una exposición a altos
niveles de sonido potencialmente peligrosa, se recomienda que todas
las personas expuestas a equipamiento capaz de producir altos niveles
de presión sonora, tales como este sistema de amplificación, se
encuentren protegidas por protectores auditivos mientras esta unidad
esté operando.
Duración por
Día en Horas
8
6
4
3
2
1 ½
1
½
¼ o menos
Nivel de Sonido
dBA, Respuesta Lenta
90
92
95
97
100
102
105
110
115
INSTRUCCIONES IMPORTANTES PARA SU SEGURIDAD - ESPAÑOL

CAUTION:
WARNING:
PRECAUCION:
ADVERTENCIA:
ATTENTION:
ADVERTISSEMENT:
VORSICHT:
ACHTUNG:
IMPORTANT SAFETY INSTRUCTIONS PT 2
Risk of electrical shock - DO NOT OPEN.
To reduce the risk of electrical shock, do not remove the cover. No user serviceable parts inside.
Refer servicing to qualified personnel.
Risques de choc electrique - NE PAS OUVIRIR
Afin de reduire le risque de choc electrique, ne pas enlever le couvercle. II ne se trouve a l’interieur
aucune piece pouvant etre reparee par l’utilisateur. Confier l’entretien a un personnel qualifie.
Riesgo de corrientazo - no abra
Para disminuir el risego de carrientazo, no abra la cubierta. No hay piezas adentro que el pueda
reparar. Deje todo mantenimiento a los tecnicos calificadod.
Risiko - Elektrischer Schlag! Nicht offen!
Um das Risiko eines elektrischen Schlages zu vermeiden, nicht die Abdeckung enfernen. Es befinden
sich keineTeile darin, die vom Anwender repariert werden Konnten. Reparaturen nur von
qualifiziertem Fachpersonal durchfuhren lassen.
To prevent electrical shock or fire hazard, do not expose this appliance to rain or moisture. Before
using this appliance please read the operating instructions for further warnings.
Afin de prevenir les risques de decharge electrique ou de feu, n’exposez pas cet appareil a la pluie ou
a l’humidite. Avant d’utiliser cet appareil, lisez les advertissments supplentaires situes dans le guide.
Para evitar corrientazos o peligro de incendio, no deja expuesto a la lluvia o humedad este aparato
Antes de usar este aparato, lea mas advertcias en la guia de operacion.
Um einen elektrischen Schalg oder Feuergefahr zu vermeiden, sollte dieses Gerat nicht dem Regen
oder Feuchtigkeit ausgesetzt werden.Vor Inbetriebnahme unbedingt die Bedienungsanleitung lesen.
Intended to alert the user of the presence of important operating and maintenance (Servicing)
instructions in the literature accompanying the product.
Dieses Symbol soll den Anwender vor unsolierten gefahrlichen Spannungen innerhalb des Gehauses
warnen, die von Ausrichender Starke sind, um einen elektrischen Schlag verursachen zu konnen.
Este simbolo tiene el proposito de la alertar al usario de la presencis de instrucccones importantes
sobre la operacion y mantenimiento en la literatura que viene conel producto.
Dieses Symbol soll den Benutzer auf wichtige Instruktionen in der Bedienungsanleitung aufmerksam
machen, die Handhabung und Wartung des Produkts betreffen.
Intended to alert the user to the presence of uninsulated ‘DangerousVoltage’ within the products
enclosure that may be sufficient to constitute a risk of electrical shock to persons.
Ce symbole est utililise pur indiquer a l’utilisateur de ce produit de tension non-isolee dangereuse
pouvant etre d’intensite suffisante pour constituer un risque de choc electrique.
Este simbolo tiene el proposito de alertar al usuario de la presencia de ‘(voltaje) peligroso’ que no
tiene aislamiento dentro de la caja del producto que puede tener una magnitud suficiente como para
constituir riesgo de corrientazo.
Dieses Symbol soll den Anwender vor unsolierten gefahrlichen Spannungen innerhalb des Gehauses
warnen, die von Ausrichender Starke sind, um einen elektrischen Schlag verursachen zu konnen.
After unpacking your amplifier check that it is factory fitted
with a three pin 'grounded' (or earthed) plug. Before plugging
into the power supply ensure you are connecting to a
grounded earth outlet.
If you should wish to change the factory fitted plug yourself,
ensure that the wiring convention applicable to the country
where the amplifier is to be used is strictly conformed to. As an
example in the United Kingdom the cable colour code for
connections are shown opposite.
EARTH or
GROUND
GREEN/YELLOW
NEUTRAL - BLUE
LIVE - BROWN

Thank you for choosing to purchase an HH product.
We at HH are guided by the principle that all of our products
must balance the elements of ‘Head’ and ‘Heart: ‘Head’ is about
finding the right specifications, the right engineering solutions,
the right manufacturing techniques and of course the right price.
The ‘Heart’ comes from our understanding and passion for our
industry, our desire to make interesting and relevant products,
and many years of experience using these products in their real
applications.
We hope you enjoy using your product as much as we enjoyed
creating it.
By choosing HH you are joining a brand with heritage dating
back to 1968, a brand that helped define the techniques and
principles for sound reinforcement and backline that still inform
us today. HH products and users dating from this time are
nothing short of legendary, a history we are proud of and
constantly inspired by. Today we look forward, reinvent and
challenge ourselves constantly to build on this history and
answer current and future demands.
To register your purchase, leave your feedback and learn more
about other HH products please visit us at
www.HHelectronics.com <http://www.hhelectronics.com/> .
Thanks again.
HH Electronics
Designed and engineered with Head & Heart in the United
Kingdom
FOREWORD

The SR series of amplifiers offer impressive specifications and features,the case is ruggedly constructed from steel
and rack mountable for versatility. All feature two channels, Switched Mode Power Supply and are suitable for live
concert,disco,studio etc.
The front panel includes gain controls for each channel,these are normally illuminated green,but turn to red when
the associated channel clips.Indicators for protection,signal activity,mode and clip,as well as a mains power rocker
switch and illuminated HH Logo complete the line up.
The rear panel carries all of the input & output connectors and slide switches for the selection of Mode, Input
Sensitivity and Hi-Pass filter. The mains cord is attached here either with a Neutrik Powercon or IEC
Connector depending on the model.
This manual contains important information on operating your amplifier correctly and safely. Please take some
time to read this manual to familiarise yourself with the advanced features of this amplifier.
™
?
?
Unpacking
Inspect the amplifier during unpacking, if any damage is found, notify the dealer immediately. Be sure to save the
carton and all packaging materials. Should you ever need to return the unit back to the dealer or HH Electronics,
use only the original factory packing.
Installation
HH professional amplifiers are designed for durability in commercial installations and provide the quality
performance required in studio and live performance applications.They are 2U rack height, with 360mm depth,
designed to mount in a standard EIA 19" rack. Rear mounting ears are provided for additional support. The
minimum depth required in the rack space is 430mm (to allow adequate clearance for the connectors).When
using the equipment in a rack, consideration should also be given to cooling.The air flow through the unit from
front to back should not be obstructed or hindered in any way,so adequate ventilation in the front and rear of the
rack cabinet is important.
Basic Setup
Rack mount the amplifier in the location where it is to be used, with consideration to accessibility, cooling etc.
Make all the connections to the input connectors on the desired channels.Select the mode configuration (Bridge,
Parallel or Stereo). Connect speaker cabinets to the required output connectors, paying attention to the
impedance and phase.
With the power switch OFF and both gain controls set in their lowest position (-0 dB),connect the mains power
cord to the amplifier, then to a suitable electrical source to allow proper current draw.The amplifier is now
electrified and on standby status,there is no indication on the amplifier that there is power connected.
Turn ON the power switch, the HH logo, gain controls and the protection indicators are all illuminated, the
amplifier will now selftest automatically for around 10 seconds.The protection indicators will go out when the test
is finished.
Now the gain controls can be raised slowly to the desired settings.
Switching Off
After using the amplifier,please adjust the gain controls to their lowest settings (-0 dB),then the amplifier can be
turned off safely.Turn the power switch to the OFF position and remove the power cord from the electrical
source.
NOTE:
Do not connect or disconnect from the input signal source when the amplifier is turned ON,damage could occur
to the amplifier and the speaker.
When the amplifier is connected to the power supply,power is present inside, even in standby mode where the
power switch is in the OFF position.
If the amplifier is in standby mode without use for over 3 hours,remove the power cord from the electrical source.
INTRODUCTION

SR SERIES FRONT PANEL
1. FRONT MOUNTING BRACKETS; used in conjunction with the rear brackets to mount the amplifier in a
rack system.
2 & 6. CHANNEL GAIN CONTROLS; these controls are used to adjust the gain of each channel, they
determine how loud each channel will sound for a given input signal level. In Bridge mode CH1 potentiometer
controls the gain on both channels and in Stereo or Parallel mode just on CH1.Gain control range is:-0 dB~0dB.
The segmented surround of the controls are illuminated green in the presence of mains power.
?
3 & 7. SIGNAL INDICATOR; these indicators illuminate when there is signal activity on the associated
channel,the sensitivity is around 0.35V.
4. CLIP INDICATOR;the segmented surround of the controls are usually illuminated green,but when the level
of signal on either channel is sufficient to clip the amplifier,the surround on that channel changes to RED.When the
surround is RED,the amplifier has reached its maximum power output.The distortion is around 0.5%.
5. PARALLEL INDICATOR;shows when the amplifier is in Parallel mode,i.e.acting as two separate amps with
a common input.
8. FRONTAIR INTAKE;the air flow for cooling on this amplifier flows from front to back.Make sure that there
is an adequate air supply at the front of the amplifier and that the rear of the amplifier has room for the exhaust to
escape.
9. MAIN POWER SWITCH; switches the mains power ON and OFF. When the power switch is turned ON,
the HH logo, gain controls and the protection indicators are all illuminated, the amplifier will now selftest
automatically for around 10 seconds. The protection indicators will go out when the test has finished.
10 & 11. PROTECT INDICATORS;when these indicators are ON the amplifier is in protection mode,which
includes output short circuit,overheating, DC, VHF constant non-music high frequency signal.
12. ILLUMINATED HH LOGO;this badge is illuminated when the mains power switch is in the ON position.
SR SERIES FRONT PANEL DESCRIPTION

SR SERIES REAR PANEL
SR900 REAR PANEL
SR1500 - SR2000 REAR PANEL
1. MAINS POWER FUSE; only replace with the same type and rating specified on the rear panel.
2. MAINS POWER INLET SOCKET; connect the mains cord here before connecting to the power source.
(Either IEC or NEUTRIK POWERCON)
3 & 4. CH1 & CH2 SPEAKON OUTPUTS; use these output sockets to connect the speaker cabinets.
Stereo mode:1+ connects to the positive port,1- connects to the negative port.
5 & 6. CHANNEL 1 & 2 BINDING POST OUTPUTS; binding post speaker outputs are provided for each
channel and the speaker cables can be terminated with banana plugs or stripped wires.The red binding posts are
the signal outputs from each channel and the black posts are the chassis ground. Connect the red posts to the
positive inputs of the associated speakers.For Bridge mode operation,only the red binding posts are used and the
associated speaker loadis connected between the two red posts.
Which ever connections are used, the parallel speaker load should be limited to a minimum of
4 Ohms per channel or 8 Ohms in bridge mode for any application.
7. REAR AIR EXHAUST; the air flow for cooling on this amplifier flows from front to back,allow sufficient
clearance when rack mounting the unit.
8. SERIAL NUMBER LABEL; contains the serial number of the amplifier.
9. INPUT SENSITIVITY SWITCH; this switch changes the input sensitivity of the amplifier when using low
or high nominal input signals.Most professional mixing consoles operate at a nominal level of +4dBu;therefore use
the 26dB position to provide plenty of fader movement.For a disco mixer operating at a nominal level of 0dBu or
less use the higher gain position.
10.30Hz HI-PASS; toggles the hi-pass filter ON/OFF. In the ON position this filter will cut extremely low sub-
sonic frequencies,protecting the speakers from over-excursion
™

11.OPERATION MODE SELECTOR; use this switch to change the operation mode of the amplifier.
Stereo mode:Both channels are independent of each other,acts as two separate amps.
Parallel mode:Connect to the input on CH1,the signal is sent to both CH1 and CH2 outputs.CH 2 input is not
active. Acts as two separate amps but with a common input.
Bridge mode: Connect to CH1 input, the signal is sent to both CH1 and CH2 positive ports, acts as a single
more powerful amp.
12. CHANNEL 1 COMBI INPUT; balanced input socket for use with either XLR or Jack.
13. CHANNEL 2 COMBI INPUT; balanced input socket for use with either XLR or Jack.
14 . CHANNEL 1 LINK; this socket is in parallel with CH1 Combi Skt and provides an output signal same as
the input signal.
15. CHANNEL 2 LINK; this socket is in parallel with CH2 Combi Skt and provides an output signal same as
the input signal.
SR SERIES SETUP CONNECTIONS
Connections to all amplifiers in the series are made using the same types of connectors as illustrated below.
Signals can be inputted using an XLR or a 6.3mm jack.
The input signal can be supplied to another device through a Male XLR in the Link Skt.
Connections to the speaker cabinets can be made via Speakon connectors or Binding posts, unless in Bridge
mode where only the binding posts can be used.
CH 1 Input
XLR or Jack
CH 2 Input
XLR or Jack
Speakon™
Speaker Cabinet
Binding Post
Link - Male XLR
Link - Male XLR

SR SERIES SETUP CONNECTIONS
Bridge Mode: In this mode,an input signal is connected to channel 1,set the mode switch to Bridge,connect a
speaker cabinet across the Bridge Binding Posts and adjust the CH1 gain control, usually set to full power and
then control the output from the signal source.See wiring diagrams for connectors.
Stereo Mode: In this mode, a different input signal can be connected to each channel,set the mode switch to
Stereo, connect a speaker cabinet to each channel output and adjust the two gain controls, usually set to full
power and then control the output from the signal source. See wiring diagrams for connectors.
Parallel Mode:In this mode,an input signal is connected to channel 1,set the mode switch to Parallel,connect a
speaker cabinet to each channel output and adjust the two gain controls, usually set to full power and then
control the output from the signal source.See wiring diagrams for connectors.
CH1 Input
CH1 Input
CH2 Input
CH1 Input

BLOCK DIAGRAM
1 1
1 1
2 2
2 2
3 3
3 3
1 1
2 2
3 3
CH1
Combi Input
CH1
Speakon Output
CH2
Speakon Output
CH2
Combi Input
CH1 Link
XLR/M
CH2 Link
XLR/M
+ +
- -
Attenuator Attenuator
Bridge
Parallel
Stereo
Mode
Switch
Protection
Circuit
26dB 32dB
Sens
Switch
Channel 1 Preamp Channel 2 Preamp
HI-Pass
Switch
Output Stage Output Stage
Amp Front End Amp Front End
2+
2+
2-
2-
1-
1-
1+
1+
CH1
Binding Post
CH2
Binding Post

SPECIFICATIONS
Model Test Condition Tolerance SR900 SR1500 SR2000
8 Ohm
Stereo power 1KHz sine 1% THD -2.5%,10% 310WX2 450WX2 600WX2
4 Ohm
Stereo power 1KHz sine 1% THD -2.5%,10% 450WX2 750WX2 1000WX2
8 Ohm
Bridge power 1KHz sine 1% THD -2.5%,10% 1000W 1500W 2000W
Frequency
Response
8 Ohm Stereo 1/4 Rated
Power +0/-0.5dB
THD+N 8 Ohm Stereo 1/4 Rated
Power 1KHz sine ±0.01% <0.05% <0.05% <0.05%
Slew Rate 8 Ohm Stereo 1 KHz sine ±2V/µs 20V/µs 20V/µs 20V/µs
Damping Factor 8 Ohm Stereo 1 KHz sine +30/-10 >200 >250 >200
Dynamic Range 8 Ohm Stereo ±5dB >80dB >80dB >80dB
S/N Ratio 20Hz - 20KHz ±5dB >90dB >85dB >85dB
Crosstalk 8 Ohm Stereo 1 KHz sine ±5dB >70dB >70dB >70dB
Input Sensitivity 8 Ohm Stereo 1 KHz sine ±0.5dB 26dB/32dB
2.48V/1.244V
26dB/32dB
3.1V/1.55V
26dB/32dB
3.46V/1.73V
Voltage Gain ___ ±0.5dB
Input Impedance ___ ___
Link Impedance ___ ___
Output Circuitry ___ ___ Class AB Class 2H Class 2H
G.W. (Kg) ___ ___ 8Kg 11Kg 11Kg
Measurement
(H*W*D mm) ___ ___
20Hz - 20KHz @ 8Ù +0dB/-0.5dB
Balanced 20K Unbalanced 10K
H = 90 (Total), W = 430 (Amp) 485 (Total),
D = 360 (Total)
26dB/32dB
>2Ù

Reliability Protection Function
1. Clip / Limit; this function is used for preventing dangerously high level signal damage to the speakers,
Clip/Limit monitors the distortion produced by the amplifier output. When the distortion exceeds 0.5%
Clip/Limit will reduce the input signal to reduce the distortion.
2.Over heat Protection; if the amplifier works at full loading for a long time and the temperature rise reaches
over 105°C,the amplifier will go into over-heat protection status and the protection indicator on the front panel
will illuminate and the output will be cut. Try to use the amplifier in an environment temperature below 30°C.
3.VHF Protection; if the amplifier output frequency exceeds 10KHz,such as with MIC Feedback noise,then
the amplifier may go into VHF Protection after 3 seconds.The protection indicator on the front panel will be
illuminated and output to the speakers will be cut.The output signal will return within 10 seconds after the
removal of theVHF signal.
4.Short Circuit Protection; if the output is short circuited,the protection indicator on the front panel will be
illuminated and output to the speakers will be cut. The output signal will return within 10 seconds after the
removal of the short circuit.
5.AC Local Power Protection; if theAC power voltage drops too low,(~160V in the case of a ~230V unit),
the power supply will be turned off automatically until the power returns to the normal level.
6.DC Protection; if the DC output voltage to the speakers is large (>2.6V),the DC protection circuit will start
up,the output will be cut and the indicator on the front panel will be lit.
RELIABILITY PROTECTION FUNCTION
This product conforms to the requirements of the following European Regulations,
Directives & Rules:-
CE Mark (93/68/EEC), Low Voltage (72/23/EEC), EMC (2004/108/EEC),
RoHS (EU2002/95/EC), WEEE (EU2002/96/EC)
In order to reduce environmental damage, at the end of its useful life, this product
must not be disposed of along with normal Household waste to landfill sites. It must
be taken to an approved recycling centre according to the recommendations of the
WEEE (Waste Electrical and Electronic Equipment) directive applicable in your
country.
In the interest of continued development, HH Electronics
reserves the right to amend product specification without prior notification.
TM
Trademarks: Speakon and the names of Neutrik®AG products
referenced herein are either trademarks and/or service marks of Neutrik®AG.

CONNECTOR WIRING
1
2
3
+
-
Gnd
+
+
-
Gnd
Gnd
2-
2+ 1-
1+
Balanced XLR
6.3mm Balanced Jack
6.3mm Unbalanced Jack
Speakon
TIP
RING
SLEEVE
TIP
SLEEVE
HOT
COLD
GROUND
HOT
GROUND
1+ POSITIVE
1- NEGATIVE
2+ NOT USED
2- NOT USED
1 GROUND
2 POSITIVE
3 NEGATIVE

NOTES

NOTES