The DMA-73 brings Heritage Audio’s 1073 microphone amplifier designs into a 2U rack mount unit. It’s powered by an included linear PSU to decrease hum in the audio path.
Features:
- 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.
- 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.