DMA 73

Stereo Micpreamp with PSU

80dB Class A Microphone preamplifier, HI-LO selectable minimum input impedance, balanced and floating. High gain positions show a higher impedance, ideal for old ribbon mics.

50Db Class A Line preamplifier, bridging input impedance, balanced and floating.

All discrete Class A Ultra High Impedance J-Fet Direct Input on a high quality Neutrik Jack. The DI circuit is ahead of the Mic Input transformer, so the transformer is on when in DI mode.

Class A single ended, 2N3055 driven, high headroom output stage.

Individual Neutrik gold plated XLR connectors for microphone and line inputs.

Gold Plated Neutrik XLR output.

PAD: 20dB Mic input attenuation ahead of the input transformer to avoid overloading it.

HI PASS FILTER: Active all discrete Class A 3rd order Bessel, 80Hz Hi Pass Filter. 18dB/octave slope.

OUTPUT control to allow overloading of the preamp.

External linear PSU to avoid electromagnetic radiation into the audio transformers ( a.k.a. hum )

Carnhill Input and Output transformers.

3 gain stage, genuine B283 gain card modular construction.

Marconi style knobs and vintage style engraved pushbuttons.