Four-channel Amplifier 4XD125B


Part of EN 54-16 approval

Four-channel power amplifier with built in battery charger for emergency power supply of VARIODYN D1 Comprio. 4XD125B has 4 independent amplifier channels each with 125 W in class D direct drive technology. Due to the fact that all amplifier channels are completely independent from each other, it is possible to use one channel for back up. This could be for the other 3 channels or alternatively for other amplifier channels of other amplifiers with the same or lower output power (only 4XDxxxB models). The amplifier may be used with the VARIODYN D1 Comprio, as well as a DOM. It is also possible to use the amplifier with a separate PSU, in this case the internal battery charger must be disabled.

  • EN 54-4 and EN 54-16 certified
  • Compliant with EN 60849 and EN 50849
  • Class D technology, efficiency> = 80 %
  • 4 independent amplifier channels
  • One of four amplifier channels can be used as general back up channel
  • One height unit
  • Ideal for use with the VARIODYN D1 Comprio
  • Self-monitoring and self-test by microcontroller
  • Protected against overload, short circuit and overheating
  • Smooth and fast step-down in 1dB steps in the event of overdrive or over load
  • 24 V DC PSU for back up mains power
  • Integrated battery charger according to EN 54-4 for charging batteries up to a capacity of 65 Ah (2 x 12 V / 65 Ah) for emergency power supply of the amplifier and one Comprio or DOM
  • Temperature controlled variable speed fans

Additional Information:
The amplifier 4XD125B is not suitable for use with VARIODYN D1 loop technology.

Color gray, similar to RAL 7016
Channel separation > 42 dB
Harmonic distortion at nominal level < 0.3 %
Rated current 2.95 A
Rated frequency 50 ... 60 Hz (+10 % / -5 %)
Rated voltage 230 V AC
Emergency power supply 24 V DC
Air humidity 0 ... 93 %
Technology Class D
Ambient temperature -5 °C ... 55 °C
Storage temperature -10 °C ... 55 °C
Dimensions W: 483 mm H: 44 mm D: 402 mm 1 HU, 19"
approx. 9 kg
Power output 4 x125W
Transmission range 20 ... 22000 Hz
Load impedance > 20 kΩ (balanced)
Declaration of Performance
  • 583491 Input cable DOM amplifier, 0.5 m, green (two units required)
  • 583477.21 Output cable 2 amplifier DOM
  • 583414 Cable set 24 V DC VARIODYN D1 Comprio / 4XD
  • 583413 Cable set for connecting the batteries to the 4XDxxxB amplifiers

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Product data sheet VARIODYN® D1 Comprio Version: 12.2013 837 KB