GHM DeltaOHM HD2050 User manual

Operating manual
Omnidirectional Sound Source
HD2050
Power amplifier/noise generator
HD2050.20
Facade Directional Loudspeaker
HD2050
.30
www.deltaohm.com
English
Keep for future reference.
Companies / Brands of GHM

HD2050 -2-V1.2
INDEX
1INTRODUCTION....................................................................................................... 3
2DESCRIPTION ......................................................................................................... 4
2.1 HD2050 +HD2050.20 SYSTEM ................................................................ 5
2.1.1 ELECTRICAL CONNECTIONS AND POWER ON...................................................... 6
2.1.1.1 Use with HD2050 dodecahedron + HD2050.20 amplifier .......................................6
2.1.1.2 Use with HD2050.30 facade loudspeaker + HD2050.20 power amplifier..................7
2.1.1.3 Use with HD2050 dodecahedron + HD2050.40 subwoofer + HD2050.20 amplifier...7
2.1.2 NOISE GENERATOR .................................................................................. 9
2.1.3 POWER AMPLIFIER AND DSP (DIGITAL SIGNAL PROCESSOR)................................ 10
2.1.4 HD2050.20R REMOTE CONTROL KIT........................................................... 12
2.1.5 HD2050.1 STAND................................................................................. 13
2.1.6 HD2050.40 SUBWOOFER ........................................................................ 13
2.1.7 HD2050.30 FACADE LOUDSPEAKER ............................................................ 14
3CONNECTORS FOR REMOTE MANAGEMENT............................................................... 17
4USING PODWARE SOFTWARE.................................................................................. 18
4.1.1 CREATE A USER CONFIGURATION AND LOAD INTO THE DSP.................................. 18
4.2 CARRIAGE ........................................................................................... 21
5TECHNICAL SPECIFICATIONS.................................................................................. 22
6HD2050 – DIRECTIVITY (ISO 140 – ISO 3382) ......................................................... 24
6.1.1 HD2050.30: SOUND POWER LEVEL ............................................................ 26
6.1.2 HD2050.30: DIRECTIVITY....................................................................... 26
7ORDERING CODES................................................................................................. 27

HD2050 -3-V1.2
1INTRODUCTION
The system is composed of dodecahedron loudspeaker HD2050, digital power amplifier
HD2050.20 and related accessories; it allows to perform building and architectural acoustics
measurements:
•Acoustic insulation
•Buildings acoustics
•Acoustic absorption
•Reverberation time
•Room acoustics ( RASTI, STI, Clarity, Definition descriptors etc.)
•Risposta all’impulso
HD2050 is a sound source able to emit sound energy in the room in a isotropic way with very
high very high sound power levels. The HD2050 sound source is designed to offer maximum
performances with special attention to international standards in the field of architectural and
building acoustics.
The standards it complies with, are EN ISO 140-3:2006 and EN ISO 3382:2001 as concerns di-
rectivity; .
HD2050 features a wide extension frequency response and provides an emission sound power
level of more than 122dB re 1pW. Twelve coaxial loudspeakers arranged on the dodecahedron
faces, provide a high acoustic performance. The twelve faces cabinet is multilayer wood made
and has a light weight allowing an optimal on site portability. The double components plastic
coating VFI-2513 gives the case a high hardness, so to conform ASTM (American Society for
Testing Materials) standards. A further opaque geal-coat finish makes the cabinet surface
scratch and waterproof resistant.

HD2050 -4-V1.2
2DESCRIPTION
The HD2050.20 is a digital signal amplifier, designed to work with HD2050 and HD2050.30
sources to obtain from these maximum acoustic performances.
The HD2050.20 amplifier incorporates a white / pink noise generator and an auxiliary input to
receive signals from other external devices.
Using supplied Podware software you can modify the EQ curve stored in the amplifier’s DSP in
order to tailor the frequency response of the system to specific measurement needs.
It’s also possible to connect the HD2050.30 façade loudspeaker or the HD2050.40 sub-woofer
(matched to the source HD2050) to HD2050.20 amplifier.
The system can be both AC and DC current supplied.

HD2050 -5-V1.2
2.1 HD2050 +HD2050.20 SYSTEM
To connect HD2050 dodecahedron to HD2050.20 amplifier refer to connectors description
shown in the picture below.
Fig. 1 – HD2050.20 amplifier front
panel
Fig. 2 – Generator section
(above) and amplifier section
(below) panel
Output connector
(signal to loud-
speaker)
AC line input
Mains and Power
ON
Switch user DSP
Amplifier Input
connector
Switch presets
Pink/White noise
selector
Manual signal
activation
Noise
generator
section
Amplifier
section
Level control
0 = MIN
Antenna
connector

HD2050 -6-V1.2
2.1.1 ELECTRICAL CONNECTIONS AND POWER ON
Below three typical connection configurations:
2.1.1.1 Use with HD2050 dodecahedron + HD2050.20 amplifier
Before making any connections make sure that the "LEVEL" potentiometer is set to minimum
by turning the knob all the way counterclockwise (position 0).
Set the PRESET switch on JA12 position for use with HD2050 dodecahedron (switch position on
JA4012 for use with HD2050.30 loudspeaker).
If user needs a custom equalization, set the switch "User DSP" to ON. To create, edit and load
in the DSP a custom equalization refer to page Errore. Il segnalibro non è definito. in the
specific section of this manual.
Connect the L-shaped cable-adapter (Fig. on page 12) to HD2050 dodecahedron.
Connect the Neutrik SPEAKON signal cable to L-shaped cable-adapter (loudspeaker side); then
connect the other head of the cable to “OUTPUT” amplifier connector.
Connect the supplied HD2050.2 power cord to AC LINE amplifier’s input socket; then connect
the other side to the wall socket
NB: the Neutrik POWERCON cable connector (amplifier side) also serves as a power switch
of the apparatus.. As soon as the POWERCON connector is plugged in, rotate it by about 45°
clockwise in order to turn ON the amplifier.
ROTATE CLOCKWISE TO TURN ON AMPLIFIER

HD2050 -7-V1.2
2.1.1.2 Use with HD2050.30 facade loudspeaker + HD2050.20 power amplifier
Before making any connections make sure that the "LEVEL" potentiometer is set to minimum
by turning the knob all the way counterclockwise (position 0).
Set the PRESET switch on JA4012 position for use with HD2050.30 loudspeaker.
If user needs a custom equalization, set the switch "User DSP" to ON. To create, edit and load
in the DSP a custom equalization refer to page Errore. Il segnalibro non è definito. in the
specific section of this manual.
Connect the Neutrik SPEAKON signal cable to HD2050.30 input connector; then connect the
other head of the cable to “OUTPUT” amplifier connector
Connect the supplied HD2050.2 power cord to AC LINE amplifier’s input socket; then connect
the other side to the wall socket
NB: the Neutrik POWERCON cable connector (amplifier side) also serves as a power switch
of the apparatus. As soon as the POWERCON connector is plugged in, rotate it by about 45°
clockwise in order to turn ON the amplifier.
ROTATE CLOCKWISE TO TURN ON AMPLIFIER
2.1.1.3 Use with HD2050 dodecahedron + HD2050.40 subwoofer + HD2050.20
amplifier
Before making any connections make sure that the "LEVEL" potentiometer is set to minimum
by turning the knob all the way counterclockwise (position 0).
Set the PRESET switch on JA12 position for use with HD2050 dodecahedron.

HD2050 -8-V1.2
If user needs a custom equalization, set the switch "User DSP" to ON. To create, edit and load
in the DSP a custom equalization refer to page Errore. Il segnalibro non è definito. in the
specific section of this manual.
Connect the Neutrik SPEAKON signal cable (2mt length HD2050.1.2) from HD2050 dodecahe-
dron to one of the two subwoofer’s input connectors (no matter which one); then connect the
other head of the cable to “OUTPUT” amplifier connector
Connect the Neutrik SPEAKON signal cable (HD2050.1.5), one side to the free second input
socket of subwoofer, while the other side to “OUTPUT” amplifier connector.
Connect the supplied HD2050.2 power cord to AC LINE amplifier’s input socket; then connect
the other side to the wall socket.
NB: the Neutrik POWERCON cable connector (amplifier side) also serves as a power switch
of the apparatus. As soon as the POWERCON connector is plugged in, rotate it by about 45°
clockwise in order to turn ON the amplifier.
ROTATE CLOCKWISE TO TURN ON AMPLIFIER

HD2050 -9-V1.2
2.1.2 NOISE GENERATOR
Fig. 3 – Noise Generator section of HD2050.20 amplifier
The noise generator has two buttons: one is used to activate the noise generator (ACTIVE);
the other one is used to select the type of noise, between white noise and pink noise, sent to
amplifier
The green led “active” indicates that the generator’s status is ON.
By the external transmitter of the embedded remote control kit, the “mute” is activated, inter-
rupting immediately the generated noise. When the “mute” is activated, the cooling fan of the
amplifier’s power section, will be turned OFF for some seconds; in this way it’s avoided that
the noise generated by the fan could influence the acoustic measurement, if the background
noise level is considerably low
When the optional HD2050B kit (kit with inverter for battery power supply of apparatus when
mains power supply is not available) is used, it’s possible to use the JA-BT FAN CONTROL
connector to drive the power OFF of cooling fan installed in the HD2050B kit.
The noise generator emission level is manually adjusted using the “LEVEL” potentiometer. In
this way it’s possible to send the requested signal level to amplifier’s input. When the potenti-
ometer is rotated to the maximum clockwise (indication 10), the generator’s output level is
equal to the maximum allowed level of HD2050.20 amplifier’s input.

HD2050 -10 -V1.2
2.1.3 POWER AMPLIFIER AND DSP (DIGITAL SIGNAL PROCESSOR)
Fig. 4 –PRESETS, User DSP sections and amplifier connectors
HD2050.20 power amplifier uses a Digital Signal Processor with two different selectable
“presets”; the needed preset can be activated using the “PRESETS” switch on the amplifier’s
front panel.
The preset settings allow optimum operation of the amplification system with the use of the
dodecahedral source HD2050 or when the HD2050.30 facade loudspeaker is used
1. PRESET JA12: dodecahedral sound source HD2050 (with or without HD2050.40 sub)
2. PRESET JA4012: facade insulation loudspeaker HD2050.30
The two presets cannot be modified by the user and are loaded as factory default when the
system is delivered to customers. They include correct frequency cuts and optimal setup
(limiter) of input signal amplitude in order to obtain the maximum system performance without
the risk to damage electronic components.
The two “presets” are very different each other and are studied to be used with specific
loudspeakers models. For a correct loudspeaker response and mostly in order to avoid any
damage, it’s compulsory to use the correct preset for each loudspeaker connected to the
system.
A second switch named “User DSP” allows to activate and load on the system a correction
curve to equalize the acoustic response of the loudspeaker. The correction curve works “over”
the selected preset. The equalization curve “User DSP” can be created and modified by the
user, through the PodWare PC software program supplied with the amplifier HD2050.20. After
equalization creation and modification the curve can be loaded on the amplifier’s DSP through
the serial interface (USB connector on the front panel). The user defined equalizations can be