Sumo Axiom CD transport & Theorem II D/A processor Specifications

Sidebar 3: Specifications

Theorem II D/A converter: Frequency response: 20Hz–20kHz ±0.5dB. THD: <0.004% at 2V output. Signal/noise ratio: !w100dB. Channel separation: >80dB. Induced jitter: <80ps. Conversion system: 18-bit hybrid DAC. Digital filter: 8x-oversampling. Analog section: discrete, DC-coupled. Inputs: TosLink optical, RCA coaxial, clock (RCA).
Dimensions: 19" W by 2.75" H by 11" D. Weight: 20 lb.
Serial number of unit reviewed: 1000956.
Price: $899 (a version with true balanced outputs costs $1099) (1995); no longer available (2019).

Axiom CD transport with remote control: Digital output: one coaxial on RCA jack, one AES/EBU on XLR jack. Clock output: RCA jack. Output impedance: 75 ohms (coaxial), 110 ohms (AES/EBU). Output level: 1V p–p (coaxial), 2V p–p (AES/EBU). Clock output: 384x-oversampling, crystal-controlled.
Dimensions: 19" W by 3.5" H by 12" D. Weight: 16 lb.
Serial number of unit reviewed: 3581200.
Price: $899 (1995); no longer available (2019).

Common to both: Approximate number of dealers: 55.
Manufacturer: Sumo Products Group, Agoura Hills, CA 91301 (1995); company no longer in existence (2019).

Sumo Products Group
Company no longer in existence (2019)

hollowman's picture

As was done recently with orig. 1987 PS Audio DAC, Stereophile should re-review the gear if possible. Ask for loaners on FB or the forums as needed.
New product developers and customers need some sort of "reference metric". E.g., how much has digital technology improved ... subjectively and objectively (measurements).

JRT's picture

For more than two decades, you have been able to rip once, play many, and do so with more precision and accuracy and consistency than with any real time CDP.

Playback using physical media is archaic, regardless if CD, LP or 8-track tape cassettes.

Ortofan's picture

... start with this unit:
The measured performance was outstanding and JGH said he'd buy one.

Bogolu Haranath's picture

Bryston BCD-3 ($3,500) measurements are comparable to the Sony CDP-X779 ES :-) ........

Bogolu Haranath's picture

Maranz CD 5005 ($400) and CD 6006 ($500) could offer similar excellent measurements as the Sony and Bryston CD players :-) .........

Bogolu Haranath's picture

Stereophile could review the Denon DCD-600NE ($300) CD player :-) .........

Bogolu Haranath's picture

Adjusted for inflation the Sony CDP-X779 ES would cost approximately $4,000 in 2019 :-) ........