Sensitivity: 1.0VRMS output at 0dB(maximum output)
Band-pass: 5Hz to 20KHz, +0. -.5dB
Hum and Noise: better than 92dB relative to1.0V output
Distortion: less than 0.05% THD
Phase: 0, 180 degrees of phase shift, switch selectable
Inputs: BNC and RCA Coaxial, TOSlink optical, ST Glass optical
Mechanical: 19” Wide X 3.315” High X 14 3/8” Deep
Weight: 16 lbs.
D/A-1 was a digital to analog converter using FET analog circuitry. Data
filtering in the D/A-1 is done by a digital linear phase filter. This
filter was chosen because offered very low ripple, and an imposing 100
dB of rejection of the stop-band. It also handles the final error
correction. Other filtering systems tended to sound much harsher.
Data Conversion is accomplished by a bit-stream DAC chip. Bit-stream
chips offer the most musical performance, especially in the critical mid
and high frequency ranges, contributing to the D/A-1’s smooth, extended
Analog filtering is done in the final stage of the D/A-1. This stage is
a low-pass filter, designed to remove high-frequency (supersonic)
artifacts of the conversion process. The analog stage is a second-order
Bessel filter and buffer circuit using jfets, tin-oxide resistors, and
all polypropylene and polystyrene capacitors.
power supplies in the DA/1 are critical to the overall design. Separate
discrete, regulated power supplies power the output filter and the
analog circuits in the DAC. These power supplies use polypropylene and
polystyrene exclusively. Separate power transformers, and a shielded
compartment isolate the analog stage from the digital circuitry.
Quando ho provato questo convertitore ho avvertito la stessa sensazione
di quando ho provato il
32 , nonostante siano macchine di qualche anno fa suonano davvero
bene , dolci musicali e armoniose . Davvero macchine di
altissimo livello .
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