Dynacord Stereo Amplifier DPA 4245 User Manual

OWNER’S MANUAL  
DPA 4245 / DPA 4260 POWER AMPLIFIER  
Features  
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
2 x 450 watts output power capacity DPA 4245  
2 x 600 watts output power capacity DPA 4260  
floating 100 V / 70 V / 25 V power outputs (isolated outputs)  
low impedance outputs (direct outputs)  
bridged mode operation, switchable  
all outputs are protected against idling and short-circuit  
mains supply 230 V AC 50/60 Hz  
POWER REMOTE function  
service mains switch  
active ventilation via 2 temperature-controlled DC-fans  
electronically balanced inputs  
routing switch for parallel linked operation  
input gain controls  
integrated audio limiters  
power-on switching noise suppression  
protection circuitry: DC/HF, Back-EMF, output voltage overload limiters, initial inrush current limiter,  
output peak current limiter  
·
·
·
·
·
·
18 dB/oct. LO-cut filter at 45 Hz  
SIGNAL and LIMIT indication for optical monitoring  
thermal overload protection for the heat sink and the internal power supply, with PROTECT-function  
inputs transformers for balanced, floating operation are optionally available  
XLR-type and binding post clamping input connectors  
19" frame size, 3 HU  
15  
 
DESCRIPTION  
Especially designed for permanent installations, the DPA-Series power amplifiers offer performance-con-  
sistent and reliable operation of PA-systems with 2 individual loudspeaker lines, each. Therefore,  
DPA-Series power amplifiers are most suitable for company intercom, alarm and background music  
transmission installations in offices and commercial areas, congregation and sport centers, schools,  
houses of worship, hotels, hospitals, shopping malls and super markets, cruise ships, and other similar  
applications.  
Each power amplifier incorporates two high-performance output transformers. Next to 100 V, 70 V, and  
25 V floating outputs, the direct outputs provide the possibility to also drive loudspeaker systems with  
low-impedance down to a minimum of 4 ohms. Simultaneous operation of low-impedance speaker  
systems and floating loudspeaker lines on a single output channel of the power amplifiers is possible as  
well.  
The integrated 45 Hz LO-cut filter with 18 dB/oct. slope protects the connected loudspeaker lines from  
unwanted ultra-low frequencies.  
Comparator circuitry constantly monitors the input and output signals of the power amplifiers and activates  
their internal limiters whenever non-linear operation is encountered which reliably protects the connected  
loudspeaker systems against overload conditions and clipping, saturation of the power supply transfor-  
mers, and overvoltage at the outputs. The DPA-Series power amplifiers’ transmission and sound qualities  
are absolutely superb. The employed comprehensive dimensioned power supply units with low-interfe-  
rence toroidal transformers ensure that the stated nominal performance specifications are accomplished,  
even in most demanding and critical installations. Since the DPA-Series power amplifiers do not employ  
V/I-Foldback-Limiter circuits, operation on complex loads up to ±90° phase angles is possible without a  
problem.  
Quick optical information on the power amplifiers’ momentary operational status is provided through easily  
readable LED indicators, individually showing whether a channel is ready for operation, a signal is present  
at the output, if any of the limiter circuits and/or one of the protection circuits has been activated.  
The inputs are electronically balanced and carried out as XLRF-type and as binding post clamping  
connectors as well. Parallel linking the two connector types at the input provides the possibility to utilize  
the carried-through signals to feed additional power amplifiers, without the necessity for special split-cab-  
les. Both inputs can be optionally retrofitted with input transformers. Through Input Routing switches it is  
possible to configure the DPA-Series power amplifiers for stereo, parallel-monaural, or bridged-mode  
operation.  
The dB-scaled level controls – extremely precise and good to operate potentiometers – are located on  
the rear of the appliances. A Ground-Lift switch which helps eliminating ground noise loops by separating  
the amplifier circuit ground from the common ground of the enclosure is also to be found on the rear  
panels. Conveniently connecting the loudspeaker lines to the power amplifiers is provided through a  
binding post strip, where all voltages – 25 V, 70 V, 100 V – and the low-impedance output are present on  
individual screw-clamp connectors. The rear panel service mains switches allow turning the power  
amplifiers’ power on directly. Using the provided power remote input, remote-start is also possible.  
Consistent thermal stability of the power amplifiers is obtained through extremely silent running fans which  
are automatically switched stepwise depending on the amplifiers’ operation mode. The front-to-rear air  
circulation guarantees trouble-free operation in rack-shelf enclosures of any size.  
Several other features of the DPA-Series power amplifiers are revealed within this owner’s manual.  
Therefore, please take the time to carefully and entirely read the provided information.  
17  
 
Installation Notes  
Generally, it is important to install the power amplifier in a way, that ensures unhindered front-to-rear air  
circulation.  
When installing the power amplifier in a closed rack-shelf system, please make sure that adequate air-flow  
is guaranteed. The space between the rear panel of the amplifier and the inner wall of the rack-case has  
to be at least 60 mm x 330 mm. A free space of at least 100 mm above the rack-shelf system is needed  
to provide sufficient air circulation. Since, during operation, the temperature inside the rack system could  
easily rise up to 40° C, the maximum allowable ambient temperatures of the rest of the incorporated  
modules and appliances within a specific rack-shelf system have to be taken into careful consideration.  
When mounting the power amplifier insi-  
de of a closed rack system, it is recom-  
mended to use special rack-rails or  
optionally available rack-mount ears  
NRS 90235 (112733) to prevent bending  
of the appliance’s front panel.  
Note  
For maintained trouble-free operation of the appliance, the maximum admissible ambient  
temperature of +40°C is not to be exceeded.  
The amplifier has to be protected from:  
- water drops or splashes  
- direct sunlight  
- high ambient temperatures and the direct radiation of heat sources  
- high humidity and moisture  
- heavy dust  
- massive vibrations  
Moving the amplifier from a cold into a warm environment can result in the occurrence of condensation  
on inner parts. Operating the appliance is only permissible after it has accommodated to the altered  
temperature (approximately after one hour).  
Should any foreign solid parts or liquids inadvertently intrude the enclosure, immediately unplug the device  
from the power source and have it checked at a DYNACORD service center, before further use.  
Cleaning the appliance should not be performed using chemical solvents or sprays, as this might damage  
the finish and could even cause hazard fire.  
Before The First Operation  
Before switching the amplifier’s power on, the included mains cord has to be connected to a 230 V - 50/60  
Hz wall outlet. On the appliance itself, the cord has to be connected to the 3-pole mains socket.  
To remotely start the amplifier, it is necessary to connect an external 24 V power source to the terminal  
strip POWER REMOTE. Providing correct connection and with an external power supply being present,  
the POWER ON indicator will light and the power amplifier is ready for operation.  
The mains switch POWER on the rear of the appliance is meant for service and maintenance purposes  
only. Through bridging the mains switching relay this option provides the possibility to operate the amplifier  
without an external 24 V power supply connected.  
Caution The mains switch POWER on the rear of the appliance is only meant for maintenance.  
Remotely switching off the device is not possible when the POWER switch is engaged.  
The DPA-Series power amplifiers employ power-on switching delays of approximately 2 seconds.  
18  
 
Inputs INPUT CHANNEL A&B  
With an input sensitivity of 775 mV = 0 dBu and an input impedance of 20  
k ohms, the electronically balanced inputs – INPUT CHANNEL A&B – are  
meant for the connection of control amplifiers, audio controllers, mixing  
consoles, etc.  
Peripheral pieces of audio equipment are either connected via the XLR-  
type input connectors or using the parallel-linked binding posts. For the  
latter option you can utilize the supplied screw-plugs. Thus, carrying the  
audio signals through to feed additional power amplifiers can be conveni-  
ently achieved without the need for special split-cables.  
The XLR-type input connectors’ pin-assignment is in accordance to the  
IEC 268 standard:  
PIN 1:  
PIN 2:  
PIN 3:  
SHIELD  
a, +  
b, -  
In case the controlling device does not supply balanced output connectors,  
it is also possible to configure the connectors for unbalanced operation.  
Therefore, the common ground (pin 1) has to be connected to the (–) input  
(pin 3). The audio signal is now solely fed through the (+) input (pin 2).  
So, to be able to entirely make use of all the advantages the electronically  
balanced input stage offers – like the suppression of humming and  
interference noise – it is beneficial to re-establish balanced input connec-  
tion whenever possible.  
In case floating inputs are needed, the inputs are ready to be retrofitted  
with input transformers; one optional available extension kit NRS 90208  
(308840) per channel is necessary.  
Instructions On How To Install NRS 90208 Extension Kits  
·
·
·
·
·
·
·
unplug the power amplifier from the mains  
detach all screws holding the cover plate of the appliance  
lift and remove the cover plate  
disconnect the flat-wire cable of the printed board assembly 81340/1  
detach all screws holding the printed board assembly 81340/1  
remove the printed board assembly 81340/1 and unsolder the resistors R106 … R109  
attach insulators to the input transformers according to the corespondent marks on the printed board  
assembly  
·
re-assemble the appliance by performing all steps described in the opposite order  
19  
 
figure: block diagram input channel A  
figure: printed board assembly area  
channel A – transformer retrofitting  
Level Control  
dB-scaled rotary controls for adjusting the power amplifier’s overall ampli-  
fication. This control should be positioned between the 0 dB and the -6 dB  
marks to prevent distortion in source devices. The labeling indicates the  
actual attenuation applied to the internal specified factor of amplification.  
Input Routing  
If the switch is set to parallel/mono, the input connectors CHANNEL A and  
CHANNEL B are electrically linked for direct parallel operation. With only  
a single audio signal source connected, both channels are driven, while  
their volume levels are still individually controlled via the level controls A  
and B.  
If the switch is set to its dual/stereo position, channels A and B are  
separately amplified (two channel or stereo mode).  
Power Outputs A&B  
The loudspeaker cables are connected to the power amplifier through high-performance binding posts –  
with the necessary screw-plugs being supplied. For connection purposes, it is possible to remove the  
12-pole terminal plug. Cables with a maximum diameter of 2.5 mm2 can be utilized. To provide flexible  
connections, all floating output voltages – 25 V, 70 V, and 100 V (ISOLATED OUTPUTS) – as well as the  
low-impedance output (DIRECT OUTPUTS) of both channels are directly accessible.  
figure: power outputs of the DPA 4260  
20  
 
Power Outputs – AUDIO TRANSFORMER OUTPUTS  
The two integrated output transformers convert the power amplifier’s nominal output voltage to the  
commonly used loudspeaker line voltage standards – 25 V, 70 V, and 100 V. These voltages are  
simultaneously present at the correspondent floating outputs of the binding post strip. The two power  
amplifier channels can be operated using any possible output voltage combination. Simultaneous  
operation of low impedance loudspeaker systems and floating loudspeaker lines on a single power  
amplifier channel is possible as well.  
Caution  
It is possible that during operation shock-hazard output voltages can be present at the  
power output connectors (>34 V peak value). Therefore, the connected loudspeaker  
lines have to be installed in accordance to applicable security standards and regulations.  
When installing and operating 100 V-loudspeaker networks, compliance to the VDE  
regulation DIN VDE 0800 is mandatory.  
Especially, if a 100 V-loudspeaker network is included in alarm system applications, all  
security standards have to be in accordance to the security class 3 standard. Before the  
first operation of the power amplifier, the loudspeaker terminal strip has to be covered  
using the supplied protection cover.  
Power Outputs - Isolated Outputs 70 V and 100 V  
To reduce line attenuation effects when the distance between power amplifier and loudspeaker systems  
exceeds 50 meters, it is recommended to employ loudspeaker systems with 100 V or 70 V line  
transformers, which also allows conveniently distributing the output power to the individual loudspeaker  
systems.  
It is possible to connect as many loudspeaker systems until the total power consumption of the  
loudspeaker network equals the nominal power handling capacity of the power amplifier; while not  
declining the nominal load impedance of the power amplifier outputs.  
For details on nominal power handling capacity and nominal load impedance of the amplifier’s individual  
power outputs, please refer to the specifications in the appendix.  
figure:  
example configuration – DPA 4260 with 100 V loudspeaker systems – maximum load  
using 30 W / 100 V and 60 W / 100 V loudspeaker systems  
21  
 
Power Outputs - Isolated Outputs 25 V  
The floating 25 V output is mainly used for driving low impedance loudspeaker systems (4 - 16 ohms).  
Because of the effect of line attenuation, the distance between power amplifier and loudspeaker systems  
should not exceed 50 meters. It is further important that the total impedance of the entire loudspeaker  
network does not decline the nominal load impedance of the 25 V output. For details on the nominal load  
impedance of the 25 V output, please also refer to the specifications in the appendix.  
figure:  
example configuration – DPA 4260 with 8 ohms and 16 ohms loudspeaker systems at  
maximum load  
Power Outputs – DIRECT OUTPUTS  
In addition to the output transformer equipped outputs and for driving low impedance, high performance  
loudspeaker systems, the power amplifier’s direct, low impedance outputs are carried out as well, offering  
a minimal load impedance of 4 ohms. Each power amplifier channel is capable of simultaneously driving  
loads at the direct output and at the isolated output. But it is of major importance that the overall power  
consumption of the connected loudspeaker systems or lines does not exceed the output power capacity  
of the power amplifier.  
Example: If a loudspeaker system with 8 ohms and a nominal power handling capacity of 300 watts is  
connected to the DPA 4260 channel A Direct Output, this equals exactly half of the power amplifier’s  
output power capacity since the minimal load impedance for each channel is 4 ohms. That leaves the  
possibility to utilizes exactly half of the nominal output power capacity of the channel A 100 V output –  
which in this example equals 500 watts/2 = 250 watts – to supply a split loudspeaker line. The total  
impedance of the loudspeaker line has not to decline 20 ohms*2 = 40 ohms.  
figure:  
example configuration – DPA 4260 channel A in mixed mode  
22  
 
Bridged Mode  
Doubling the power amplifier’s output power is accomplished by engaging bridged mode operation, where  
the two power amplifier output stages are linked for push-pull operation. In other words, a monaural power  
amplifier is “created” offering double the output voltage and double the output power capacity of a single  
channel. As a result you are provided with floating 50 V, 140 V, and 200 V as well as with a direct output  
with doubled nominal output voltage.  
If the BRIDGED-MODE switch is engaged, the audio input signal has to be fed via the CHANNEL A input  
while the CHANNEL B input is without function. The signal is internally inverted and the power amplifier  
stage B is driven by that inverted signal. The power amplifier stage A is still driven by the unaltered  
incoming audio signal. Bridged mode operation is possible with using the isolated and/or the direct outputs.  
When using the isolated outputs, bridging the (–) binding posts of channels A and B is mandatory,  
2
2
using short cables with suitable diameter (1.5 mm ... 2.5 mm )!  
Careful consideration of the loudspeaker systems’ correct connection is important in preventing phase  
correlation problems. Channel A carries the signal “in phase” and therefore has to be connected to the  
(+)-pole of the correspondent loudspeaker system while the loudspeakers (–)-pole has to be connected  
to the (+)-output connector of channel B. The output voltage of each power amplifier stage A&B is present  
at the binding post strip, but utilization is not recommended because of the negative correlation.  
figure:  
output connection in 50 V bridged mode operation  
2
*Caution! The bridging cable has to be at least 1.5 mm in diameter.  
Driving 4 ohms loads at the direct output is not admissible in bridged mode operation. For details on  
nominal load impedance and nominal loads of the individual outputs in bridged mode operation, please  
refer to the specifications in the appendix. Also in bridged mode, the nominal load impedance is not to be  
declined.  
23  
 
GROUND Lift Switch  
The ground lift switch helps is a perfect means for eliminating possible ground  
noise loops. In case the power amplifier is operated together with other  
equipment inside of a rack shelf system, the switch should be set to its  
GROUNDED position. When using the power amplifier together with other  
equipment that operates on different ground potentials, the switch should be  
set to UNGROUNDED.  
Power On And Remote Control  
When the power amplifier is operated via power remote start (standard  
operation) an external 24 V power source has to be connected to the POWER  
REMOTE terminal strip and the mains switch has to be set to its OFF-posi-  
tion. When correctly connected and with a present supply voltage, the power  
amplifier is operational. The fans run for approximately 2 seconds and the  
POWER ON-LED on the front panel lights. The mains switch POWER on the  
rear of the appliance bridges the mains relay. It is meant for service purposes  
only. This allows to operate the power amplifier without the presence of an  
external 24 V power source. The current consumption at the POWER  
REMOTE input is approximately 25 mA.  
Limit Indicator  
The indicator lights whenever the integrated limiter is activated. While short  
blinking means no problem, the continuously lit LED indicates that the volume  
level needs to be reduced to prevent the connected loudspeaker systems  
from being damaged by overload.  
The audio limiters are capable of controlling overdrive levels of up to 20 dB.  
Most other power amplifiers without integrated limiters begin to clip, genera-  
ting nasty distortion that not only attacks your ears but also lead to damaging  
the connected loudspeaker systems by overload. The limiters are activated  
only in case of the occurrence of non-linear conditions within the power  
amplifier; e. g. signal clipping at the operation voltage limit. The limiters do  
not affect the power amplifier’s overall dynamic range.  
Signal Indicator  
This indicator is lit when the audio signal exceeds –30 dB. In case short-cir-  
cuits resulting from broken loudspeaker cables are detected or one of the  
power amplifier’s protection circuits is activated, the signal indicator is  
dimmed.  
PROTECT  
The PROTECT-LED lights whenever one of the power amplifier’s protection  
circuits – thermal overload, RF, DC, Back-EMF – is activated. In PROTECT  
mode all loudspeaker lines and output transformers are disconnected via  
relays and the power amplifier’s audio inputs are short-circuited to prevent  
the connected loudspeaker systems from being damaged. When the power  
amplifier enters the PROTECT mode please examine first whether the  
appliance is overheated. If this is the case, the front and rear ventilation  
louvres are possibly covered, the nominal load impedance has fallen below  
the specified minimum value, or a short-circuit occurred at the power output.  
When switching the power amplifier on, the PROTECT-LED lights for appro-  
ximately 2 seconds. This is normal. It signals that the protection circuitry is  
in working order.  
Power ON Indicator  
This LED lights when the power amplifier is connected to the mains and its  
power switch is set to the ON-position. If the indicator does not light although  
the power amplifier is switched on, the appliance is not connected to the  
mains or the primary fuse is blown.  
24  
 
Protection Circuitry  
The DPA-Series power amplifiers are equipped with extensive protection circuitry:  
·
·
·
·
·
·
·
·
·
initial current inrush limiter  
power-on delay  
RF and DC protection  
Back-EMF protection  
limiters for the audio signals  
output peak-current-limiters  
thermal overload of the heat sink  
thermal overload of the mains transformer  
output voltage overload limiters  
High-level signals in the low frequency range can drive the output transformers of power amplifiers that  
do not provide audio signal limiters into saturation, resulting in nasty distortion and high thermal load of  
the power amplification stage. The audio signal limiters of the DPA-Series power amplifiers are designed  
to quickly identify the occurring saturation of the core of an output transformer. The level is dynamically  
reduced to a value, that stays just below the point of where the saturation starts. The Limit-LEDs on the  
front panel indicate that the limiters have been activated. Despite the protection that is provided through  
the audio signal limiters, the Limit-LEDs should not light over a longer period of time. Please, locate the  
cause of the faulty operation – e. g. lower the LF-EQ setting at the connected mixing console when at the  
same time the input level at the power amplifier is approximately +10 dB above the nominal input level.  
The DPA-Series power amplifiers employ integrated Lo-Cut filters at 45 Hz with 18 dB/oct. for each  
channel. They protect the loudspeaker systems that are connected via output transformers against  
low-frequency audio signals, which, depending on the quality and size of the involved transformers, could  
lead to problems with core saturation. In addition to the 45 Hz Lo-Cut filters, the frequency response of  
the DPA-Series power amplifiers top margin is set by 30 kHz Hi-Cut filters with 12 dB/oct., preventing  
unwanted high-frequency audio signals from being present at the outputs.  
25  
 
Mains Operation And Leakage Power  
The mains power consumption as well as the leakage power is stated for driving the power amplifier at  
different levels. All the values were measured at nominal load via the 100 V output with two channels  
driven. The shown values differ only slightly when the appliance is operated at different nominal output  
voltages or in the Direct Out mode.  
mains operation at the  
100 V output  
U
[V]  
mains  
I
[A]  
P
P
[W]  
P [W]  
out  
P [W]  
v
BTU/hr  
mains  
mains [VA]  
mains  
DPA 4245  
idling  
230V  
230V  
230V  
230V  
0,34  
2,76  
5,54  
7,45  
78  
47  
47  
160  
normal operation (-10 dB)  
alarm (-3 dB)  
635  
490  
70  
420  
688  
720  
1430  
2347  
2456  
1274  
1714  
1040  
1420  
352  
700  
nominal conditions  
DPA 4260  
idling  
230V  
230V  
230V  
230V  
0,57  
3,66  
7,34  
9,86  
131  
842  
80  
101  
506  
1000  
80  
273  
normal operation (-10 dB)  
alarm (-3 dB)  
655  
554  
864  
900  
1890  
2948  
3070  
1688  
2268  
1370  
1900  
nominal conditions  
initial current inrush for both models: < 38 A  
[VA] = apparent power U *I , P  
P
[W] = active power, P [W] = output power,  
mains out  
mains  
mains mains  
Pv[W] = leakage power, 1BTU = 1055.06 W/s  
Fuses  
location  
pos.  
—-  
—-  
F1  
utilization  
value  
dimensions  
5 x 20 mm  
5 x 20 mm  
5 x 20 mm  
5 x 20 mm  
standard  
rear panel DPA 4245  
rear panel DPA 4260  
print 84171/1  
mains fuse 230V~ AC  
mains fuse 230V~ AC  
power supply  
T8A 250V  
T10A 250V  
T1A 250V  
T1A 250V  
IEC 127  
IEC 127  
IEC 127  
IEC 127  
print 84171/1  
F2  
power supply  
Extension Kits For The DPA 4245 And The DPA 4260:  
NRS 90208 balanced input (input transformer for a single channel)  
NRS 90235 1 pair of rack-mount ears  
26  
 
Technical Specifications: DPA 4245, DPA 4260  
Amplifier at rated conditions, both channels driven, direct outputs with 8W loads, isolated outputs with rated load and voltage,  
unless otherwise specified.  
DPA4245  
Direct Output Isolated Outputs  
DPA4260  
Direct Output Isolated Outputs  
DUAL MODE  
Output Definition  
8W 4W 100V 70V  
25V  
8W 4W  
100V  
70V  
25V  
Load impedance or rated output voltage  
Rated Load Impedance  
isolated outputs only  
28.5W 14W  
1.8W  
20W  
9.8W  
1.25W  
Maximum Midband Output Power  
THD=1%, 1kHz  
Maximum Midband Output Voltage  
THD=1%, 1kHz, RMS, rated load  
Rated Output Power  
240W 450W 410W 400W 390W 330W 600W 590W 580W 570W  
44V 42.4V 108V 74.8V 26.5V 51.3V 49V 109.5V 75.4V 26.7V  
230W 350W 350W 350W 350W 300W 500W 500W 500W 500W  
THD <0.2%, 45Hz ... 20kHz,  
>10min. according IEC 268-3  
Rated Output Voltage  
THD<0.2%, 45Hz ... 20kHz  
Maximum RMS Voltage Swing  
THD=1%, 1kHz, no load connected  
Frequency Response, -3dB, ref.1kHz  
LO-Cut-Filter: 18dB/octave, 45Hz  
HI-Cut-Filter: 12dB/octave, 30kHz  
Voltage Gain  
42.9V 37.4V 100V  
70V  
25V  
31V  
49V  
44.7V 100V  
52V 121V  
70V  
88V  
25V  
32V  
44V  
125 V 87V  
45 Hz .... 30kHz  
45 Hz.... 22kHz  
45 Hz .... 30kHz  
45 Hz .... 22kHz  
34 dB 34 dB 42 dB 39 dB 30 dB 35 dB 35 dB 42 dB 39 dB 30 dB  
0dBu ( 775mV) / 20 kOhm  
at 1 kHz  
Input Sensitivity and Impedance  
at rated condition  
Slew Rate  
Power Bandwith  
25 V/µs  
45Hz ...50kHz  
30 V/µs  
45Hz .... 50kHz  
45Hz .... 25kHz  
45Hz .... 25 kHz  
THD=1%, ref. 1kHz, half power @ rated  
load impedance  
THD at rated output power,  
MBW=80kHz, 1 kHz  
IMD-SMPTE  
60 Hz, 7 kHz  
DIM30  
< 0.05%  
< 0.08%  
< 0.03%  
< 0.1% < 0.2% < 0.3%  
< 0.1% < 0.3% < 0.5%  
< 0.2% < 0.2% < 0.2%  
< -80dB  
< 0.05 %  
< 0.08%  
< 0.03 %  
< 0.1% < 0.2% < 0.3%  
< 0.1% < 0.3% < 0.5%  
< 0.2% < 0.3 % < 0.3%  
3.15 kHz, 15 kHz  
Crosstalk  
ref. 1kHz, at rated output power  
Input Impedance  
20 kOhm  
20Hz ... 20 kHz, balanced  
Damping Factor  
at 100Hz / 1kHz, direct outputs only  
Insertion Loss  
> 300 / > 200  
> 300 / > 200  
0.7 dB 0.8 dB 1.1 dB  
0.7 dB 0.8 dB 0.9 dB  
isolated outputs only  
Signal to Noise Ratio  
Rated output voltage to noise, A-weighted  
> 100 dB  
27  
 
BRIDGED MODE  
Direct Output  
Isolated Outputs  
Direct Output  
Isolated Outputs  
Output Definition  
8W  
200V  
140V  
50V  
8W  
200V  
140V  
50V  
Load impedance or rated output voltage  
Rated Load Impedance  
isolated outputs only  
——  
57W  
28W  
3.6 W  
700W  
780W  
——-  
40W  
19.6W  
2.5 W  
1000W  
1140W  
Rated Output Power  
560 W 700 W 700 W  
600W 1000W 1000W  
1200W 1180W 1160W  
THD<0.2%, 45Hz ... 20kHz  
Maximum Bridged Output Power  
THD=1%, 1kHz  
900W  
820W  
800W  
GENERELLPower Requirements  
Power Consumption  
230V / 50Hz...60Hz  
at 1/8 maximum output voltage @ rated load impedance  
690 W  
870 W  
Protections  
Audio limiters, High temperature, DC, HF, Back-EMF,  
Peak current limiters, Inrush current limiters, Turn-on delay, Output Transformer Saturation Protection  
Input Connectors  
Euro-style, 3pin, detachable or XLR  
Output Connectors  
Cooling  
Euro-style, 12pin, detachable, covered  
Front-to-Rear, 3-stage-fans  
Regulations  
The appliances are in accordance with EN60065, EN50081-1, EN 50082-1  
Safety Class  
I
Operating Temperature Range  
Mounting Depht with Connectors  
Mounting Depht without Connectors  
Dimensions (W x H x D)  
Weight (net)  
+5°C ... +40°C  
437 mm  
377 mm  
483mm x 132.5mm x 382mm  
20.5 kg  
22.5kg  
28  
 

Cobra Electronics Computer Drive CPI M400 User Manual
Code Alarm Automobile Alarm CA 160 User Manual
Continental Refrigerator Refrigerator SW27 12M FB User Manual
Craftsman Saw 31522038 User Manual
Crown Audio Stereo Amplifier CT 210 User Manual
Delfield Refrigerator UC4464N 12 User Manual
Desa Water Heater CCL3018NR CCL3018PR CCL3018NRA CCL3018PRA CCL3924NR CCL3924PR CCL3924NRA CCL3924PRA CHL3924NR CHL3924PRCCL3930NR CCL3930PR CCL3930NRA CCL3930PRA User Manual
Dynex TV Mount dx drtvm112 User Manual
EVGA Computer Hardware 123 CD E635 KR User Manual
Fisher Paykel Washer WH60F60W User Manual