DAC3MKII Digital-Analog Converter
The DAC3MKII uses a high-performance monolithic input receiver and a delta-sigma converter supplied to Audio Research by Crystal Semiconductor. The differential converter is capable of 107 dB dynamic range in the audio band, and includes 8x interpolation and a 64x oversampled delta-sigma modulator which outputs to an all-tube (four 6922 twin triodes), class A operation analog output stage. Constant-current source technology and highly regulated power supplies similar to Audio Research's best preamplifiers contribute to the natural musicality of the output stage. The suppression of sonically destructive jitter in the DAC3MKII is accomplished via three primary methods: by two voltage-control oscillators used to reclock data in the digital interface and in a phase-lock-loop circuit just prior to the analog stage; and by extensive internal damping of critical components and chassis areas to minimize mechanical resonances.A detachable AC line cord has built-in filtering.Among other conveniences, the DAC3MKII offers selectable phase inversion via a front-panel toggle switch. The DAC3MKII offers a full array of digital inputs for compatibility with any high-quality CD/LD transport or player, and provides both-single ended and balanced analog output connectors for similar compatibility with high-quality line-level preamplifiers. Audiophile-grade digital and analog interconnects such as Audio Research brand DigitaLink and LitzLink2 are strongly recommended for best performance.
Control Functions: Power On/Off, Normal/Invert, Input 1/2/3.
Inputs (Digital): ST-Standard Fiber Optical, TOSLINK Optical, Coaxial-AES/EBU (switch selectable).
Outputs: (Digital):TOSLINK Optical (digital pass-through).
Outputs (Analog): SE, BAL.
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DAC3MKII Specifications:
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FREQUENCY RESPONSE: 0.1-20,000Hz, ± .2dB. SIGNAL TO NOISE RATIO: 90 dB (unweighted 20-20,000Hz). DISTORTION: -86dB (0.005%) 1kHz. CHANNEL SEPARATION:120dB (1kHz). PHASE LINEARITY: ±0.5° (20-20, 000Hz). DIGITAL INPUT 1: ST type glass fiber optics; 1300 nm, 62.5/125 fiber. DIGITAL INPUT 2: TOSLINK fiber optics 660nm. DIGITAL INPUT 3 (Switch selectable): BNC coax 75 ohm (SPDIF) or XLR Balanced AES/EBU. FORMAT: 32kHz (DBS), 44.1kHz (CD), 48kHz (DAT). |
INPUT RESOLUTION: 18 bits (maximum).
CONVERTER RESOLUTION: 64x oversampled delta- sigma 1 bit. STEREO ANALOG OUTPUT: 1.50 Vrms (+5dBV full output). Unbalanced RCA Phono Jacks 3.00 Vrms (+11dbv full lntput). Balanced XLR Jacks. OUTPUT IMPEDANCE: 200 ohms unbalanced, 400 ohms balanced. DIGITAL OUTPUT TOSLINK FIBER OPTICS: 660nm. RECLOCKING METHOD: PLL x 2. 2nd PLL corner frequency @ 12Hz. INVERTING SWITCH: Digital Domain. PANEL INDICATORS: Power On, Digital Lock. |
COMPLIANCE: RF interference complies with FCC and VDE.
POWER SUPPY: 2 Transformers, 2 Discrete Regulators, 8 IC Regulators. POWER REQUIREMENTS: 95-135VAC 60Hz (190-270VAC 50/60Hz), 55 watts maximum. LINE FUSE: 11/2A slo-blo (3/4A slo-blo 240V). DIMENSIONS: 19" (48 cm) W x 5.25" (13.4 cm) H x 11.75" (29.8 cm) D. Handles extend 1.50" (3.8 cm) forward of front panel. Rear chassis fittings extend .75" (2.3 cm). WEIGHT: 15.2 lbs. (6.9 kg) Net; 27 lbs. (12.3 kg) Shipping. Specifications subject to change without notice. |
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Audio Research Corporation
3900 Annapolis Lane North
Plymouth, Minnesota USA 55447-5447
Phone: 763-577-9700 Fax: 763-577-0323
www.audioresearch.com
©2000 Audio Research