Heritage Audio DMA-73

Microphone Preamplifier

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Technical Data

Manufactured by Heritage Audio
Released in 2013
Average price : $2267
80 dB Class A microphone preamplifier
HI-LO selectable input impedance
High gain settings have a higher input impedance
Ideal for older ribbon microphones
50 dB Class A Line preamplifier
Discreet Class A Ultra High Impedance J-Fet Direct Input to a high-quality Neutrik jack
The DI input is in front of the input transformer, which is directly in the signal path
Class A single ended 2N3055 output stage with enormous headroom
Gold-plated Neutrik XLR connectors for inputs and outputs
PAD: 20 dB Mic input PAD in front of the input transformer to avoid overdriving the transformer
HI PASS FILTER: Active third-order discrete filter (Bessel)
80 Hz Hi Pass filter
18dB / Octave slope
OUTPUT control allows turning down in order to intentionally override the preamp.
External power supply to avoid electromagnetic interferences and thus "hum"
Carnhill input and output transformer
3 Gain stages
Marconi style knob and engraved "vintage" push buttons