4XD250B Four-Channel Amplifier

Esser’s 4XD250B Four-channel amplifiers with integrated battery recharging system are used for the emergency power supply to the VARIODYN D1 Comprio. The 4XD250B features 4 independent amplifier channels, each with 250 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 and 4XDxxxW models). The amplifier can be used in combination with the VARIODYN D1 Comprio as well as with a DOM.

It is also possible to use the amplifier also with a separate PSU, the internal PSU must be switched of then. It gets self-monitoring and self-test by microcontroller. It is protected against overload, short circuit and overheating.

• Class D technology, efficiency> = 80 %
• 4 independent amplifier channels
• One of four amplifier channels can be used as general back up channel
• Two Height Unit (2 HU)
• Ideal for use with the VARIODYN D1 Comprio
• Self-monitoring and self-test by microcontroller
• Protected against overload, short circuit and overheating

• EN 54-4
• EN 54-16