I am listing an almost mint Chord 64 in silver recently taken on trade. You honestly need a magnifying glass to find the tiniest mark in its chassis. Very, very clean unit. Unfortunately this unit lost its original box and packing years ago. I will be able to easily pack and ship quite well and safely. This unit works but has a very faint high freq noise in background and a bit of static when in its non-buffer mode. In the buffered mode, the static is not present. Crazy! I do not have the time to fool with it so selling cheap as-is.
The DAC64 looks as if carved from a
solid chunk of aluminum, the only visible highlights being a recess for
the gold-plated logo and a convex glass window, though which the circuit
board can be seen, illuminated by LEDs of various colors. In fact,
these internal LEDs provide feedback to the user: When you turn the
DAC64 on, blue LEDs light up. When the DAC64 locks to a data source, red
LEDs add a purple hue. When either of the RAM buffers is selected,
yellow LEDs illuminate.
The rear panel features three digital
inputs—TosLink optical, S/PDIF electrical via a BNC jack, and AES/EBU on
the usual XLR—selected by a three-position toggle switch. Although the
specification states the DAC64 will accept 192kHz-sampled data, the
necessary second AES/EBU jack doesn't exist. A second toggle selects
between no RAM buffer and either of the two RAM settings. Both
single-ended (RCA) and balanced (XLR) outputs are provided.
64-bit processing Description:
In its announcement of the DAC64, Chord fired a salvo in the numbers
wars by talking about a "64-bit" DAC. This sounds like overkill,
considering CD's and DVD's respective 14- and 16-bit limits. And, of
course, 64-bit performance implies a dynamic range that might well allow
the Big Bang itself to be captured in full fidelity. But what is
actually meant, as Chord's literature carefully explains, is that the
digital reconstruction filter used in the DAC64 is realized using a
64-bit DSP core, and that the Pulse Array D/A chip uses seventh-order
noise-shaping realized with 64-bit mathematical precision. Both mean
that any mathematical error due to the filtering and noise-shaping
calculations will be way below the analog noise floor, and therefore inconsequential.
D/A processor with
three digital inputs (XLR, AES/EBU; TosLink optical and BNC electrical,
S/PDIF), RAM input buffer, and balanced and unbalanced analog outputs.
Sample frequencies accepted: 32-192kHz. THD: <-98dB (1kHz, 24-bit
data). S/N ratio: >110dB. Channel separation: >110dB at 1kHz,
>100dB at 22.1kHz. Dynamic range: 120dB. Maximum output level: 6V RMS
balanced, 3V RMS unbalanced. Output impedance: 75 ohms (short-circuit
13.3" (338mm) W by 2.4" (60mm) H by 5.7" (145mm) D. Weight: 15.4 lbs (7kg).
Read more at http://www.stereophile.com/content/chord-electronics-dac64-da-processor-specifications#BpH1EbHKEgHyiOMz.99