Type HMA4000 is a dual channel hi-voltage microphone amplifier with better than -90dB channel cross talk and an extremely impressive frequency range from 10Hz to 200kHz +0dB/-1dB. It can handle input signals of up to 160V peak with the attenuator set at -20dB, and has an extremely wide dynamic range of 140dB with the attenuator set at 0dB.
 
The output stage design is balanced Class A and has a cable drive capability of up to 300m. The input stages uses state of the art SMD technology to build up the circuit around the input connectors for higher electromagnetic immunity and perfect thermal stability. The HMA4000 is designed for use close to the microphones to keep microphone cables as short as possible, it therefore has an extremely compact, simple, and rugged chassis design.

Besides being a microphone amplifier with unsurpassed specs, the HMA4000 is an extremely comprehensive microphone power supply unit with 130V for the hi-voltage microphone preamplifiers, 200V for capsule polarization and 6V for heater voltage in tube microphones. Armed with this, you are prepared for the future in microphones...