Denon 4000

Little is documented about the Denon 4000. The record shows a professional double CD player for the rack-mount market, built to the standard 19-inch width in a 3.5-inch (two-rack-unit) chassis. The dual-deck design implies it was meant for continuous playback or DJ-style switching between discs. Nothing on the transport mechanism or control layout survives in the research.

The measurements are about all that's confirmed. The unit draws 20W at 120V/60Hz, weighs 19 lbs (8.6 kg), and measures 19 × 3.5 × 12.5 inches (48.3 × 8.9 × 31.8 cm). No production years, original price, or audio specs like frequency response or signal-to-noise ratio have surfaced.

One caution on identity. Denon's professional division lists a "DN-4000" CD player on its website, and that model may be the same product or a different one. Without corroboration, the specs from that page have been left out here rather than risk misattribution. A 1984 issue of Audio magazine notes that Denon is credited with inventing the PCM recording process in 1972 (Audio, December 1984, p.71).

Type: Professional double CD player
Power: AC 120V, 60Hz, 20W
Weight: 19 lbs (8.6 kg)
Dimensions (W×H×D): 19 × 3.5 × 12.5 in (48.3 × 8.9 × 31.8 cm)