Four-channel amplifier 4XD125B

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 12V / 65 Ah) for emergency power supply of the amplifier and one Comprio or DOM
  • Temperature controlled variable speed fans