Spectral dmc 6 preamp
Note that vacuum tube circuits inherently perform this isolation nicely. The inherently linear and isolated construction of the DMA-50 eliminates these distorted currents and the resultant interconnect dependancy. Different cables and loads can alter these ripple through interference wave shapes thereby creating different sonics either at the amplifier or other equipment receiving this energy These tend to ripple through from stage to stage wi thin and often resurface at one or more connectors or grounds. Indeed, inner signals of many large complex high feedback amplifiers are extraordinarily distorted and harmonic rich. Additional interference rejection occurs from a 50 mHz cascade front end gain stage giving isolation between the inner amplifier signals and the outside world of cables, preamplifiers and loads. Such features improve sonics and assure absolute solid defined performance for any practical combination of loads and cables. metal construction yielding electrical accuracies only the most sophisticated test equiptment obtainable can measure.
SPECTRAL DMC 6 PREAMP FREE
As a sideline, these very critical parts are oxide free exotic. With less distortion coverup needed, feedback requirements then become less stringent thereby preventing internal overdrive problems that create the "kinks" and "funny stuff" all too prevalent with large complex designs.Īgain miniturization pays off by allowing an almost inductance free grounding scheme and making frequency compensated dividers along the very small feedback paths. Gain stages then respond tube-like with an inherent low distortion, a more symmetrical voltage slew and near glitch free overload recovery. Vacuum tubes do this smoothly however, for the DMA-50, the well known abrupt solid state junction behavior is rounded and linearized with very carefully thought out and chosen interstage canponents. Unfortunately, in practice, all amplifying devices change characteristics with variations of these conditions. Also, the amplifier is made unquestionably stable for all combinations of voltage, current, load, cables and wave time history conditions occurring anywhere in the circuitry. The most important ones eliminate subtle but cold, grainy, and often "skidderish" solid state sonics. To do this, many design features from microwave technology and master recording electronics experience are applied. This power, speed and quick recovery foundation sets the stage for very subtle and transparent reproduction. Hence with so much dynamic headroom, the DMA-50 will reproduce a DC to one megaHertz output signal virtually stress free. 1,000 volt per microsecond output capability when needed. Moreover, this quickness is backed up by an 18 amp.
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Because of this, the DMA-50 responds in 0.0000001 second to overloads, cable reflections and other real system requirements. Such high energy capability makes the following stage and load respond quickly without charge memory overhang from previous waveform events. Each channel has four of these, and each stage "is capable of very high drive current, overvoltage, and rapid charge sweep. Circuits feature quick responding bi-polar, J-fet, and large area enhancement mode amplifying devices, all cleverly arranged to make fast linear gain stages. Its miniturization is functional as its dense packed component arrangement assures fast in-phase response with precision timing along all circuit paths. This is the first amplifier to combine quickness, speed and brutality with meticulous design and performance detailing. Lets begin with Keith Johnson description of the DMA-50. One of the genesis products of Spectral designed by Professor Keith Johnson.