Excellent Bryston BDA1 DAC. Gently used in very clean condition- from non pet/smoking home and working perfectly. Built like a tank, this DAC presents a stunning soundstage with great clarity and pairs well with my tube amp or solid state.One of Bryston's primary goals for the BDA-1 was to reduce clock jitter, ie, mistimings of the digital datastream presented to the DAC. Unlike the company's BCD-1 CD player, a one-box transport and DAC, the standalone BDA-1 must reclock all signals fed to its data inputs. To maintain timing accuracy, the Bryston engineers used three different methods of maintaining accuracy and keeping jitter to a minimum: impedance-matching transformers to provide the best interface possible, reclocking the signal, and synchronously upsampling the signal. The BDA-1's Burr-Brown SRC4392 sample-rate converter provides synchronous upsampling: 32, 48, and 96kHz data are upsampled to 192kHz, while 44.1 and 88.2kHz data are upsampled to 176.4kHz. The Compact Disc's 16-bit depth can be increased to 24 bits, the additional 8 bits filled with placeholder information. While this adds no new information, the conversions of the sample rate and bit depth transform the digital signal into a format that can be optimally converted into an analog signal by the DAC, says Bryston. The D/A conversion is done by a pair of Crystal CS4398 integrated-circuit chips, which feed discrete-component, class-A output amplifiers. The BDA-1 reproduced the music's warmth and fullness with none of the irritating edginess I've heard from earlier standalone DACs. Description: Digital-to-analog converter with remote control of digital input and volume. Digital inputs: USB 1.1, four S/PDIF electrical (RCA, BNC); two S/PDIF optical (TosLink), AES/EBU (XLR). Digital input sample rates accepted: 32, 44.1, 48, 88.2, 96, 176.4, and 192kHz (transformer-coupled S/PDIF, AES/EBU); 32–48kHz, USB. Input word lengths accepted: 16–24-bit, S/PDIF and AES/EBU; 16-bit, USB. Digital output: S/PDIF bypass loop output via RCA jacks. Control inputs: RS-232 port via 9-pin subminiature connector; remote 12V power-on/off trigger. Analog outputs: 1 pair each RCA, balanced XLR. Maximum output level: 2.3V RMS unbalanced, 4.6V balanced. Output impedance: 100 ohms balanced, 50 ohms unbalanced. Frequency response: 20Hz–20kHz, ±0.1dB. THD+noise at 1kHz: 0.002%. IMD (CCIF): 0.0003%, 19+20kHz. Channel separation: 109dB at 1kHz. Output noise: <4ÊV or –100dB, 20Hz–20kHz (ref. 1V). Signal/noise: 140dB. Dynamic range at –60dBFS: 123dB. Jitter: <250ps peak–peak. Power consumption: 10VA.
Dimensions: 17" (432mm) or 19" (483mm) with rack ears W by 2.75" (44mm) H by 11.25" (286mm) D. Shipping weight: 18 lbs (8.2kg).
Price: $1995; add $350 for BR-2 remote control. Approximate number of dealers: 200. Warranty: 5 years parts & labor, digital circuits; 20 years, analog circuits.
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