Descripción
| DMA 73 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. DMA 73 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. |
