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HomepageMic PreampsDual Mic-Preamps › Heritage Audio DMA73
Heritage Audio DMA73

The Heritage Audio DMA73 2-Channel microphone preamp combines outstanding Class A preamp design and premium componentry to provide you pristine audio details and sonic flexibility.

Perfect for old ribbon mics, the 80dB microphone preamp lets you faithfully re-create that vintage sound. The Heritage Audio DMA73 also features ultra-high-impedance J-Fet direct input and 20dB pad, so you'll have clarity in your signal chain without the fear of overloading. Armed with Neutrik input and output jacks, the Heritage Audio DMA73 2-channel microphone preamplifier is a front-end like no other.
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. 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.
  • Specifications
  • Microphone input impedance: HI, 1200 Ohm minimum, LO, 300 Ohm minimum. Higher gain positions gradually have greater impedances, optimum for lo gain ribbon mics. Input is Carnhill transformer balanced and floating.
  • Line input impedance: 10K Ohms bridging, Carnhill transformer balanced and floating.
  • DI input impedance: Greater than 2 Megohms, unbalanced.
  • Output impedance: Less than 75 Ohms, Carnhill transformer balanced and floating, to drive a load of 600 ohms (factory terminated).
  • Maximum output: Greater than +26dBm into 600 ohms.
  • THD: Less than 0.025% at 1 Khz, less than 0.05% at 100Hz.
  • Frequency response: 20Hz ( +0.3dB ) to 20Khz (-0.2dB)
  • Maximum gain: Slightly greater than 80dB
  • Noise: Less than -100dBm.
  • Power consumption: Less than 200 mA @24VDC
  • Reviews
    Price *
     
    $2909.00
    Free shipping in Canada. Conditions
    Additional information
    For more information about the DMA73, please visit the website of Heritage Audio
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