Denon EQ-10 (1983)
The Denon EQ-10 is a 10-band stereo graphic equalizer from 1983. It comes from Denon's early-80s separates line. It doesn't seem to have drawn much press attention, but the specs that survive agree across multiple databases.
Each channel has ten bands at ISO center frequencies - 31.5, 45, 63, 90, 125, 180, 250, 350, 500, 700, 1k, 1.4k, 2k, 2.8k, 4k, 5.6k, 8k, 11k, 16k, and 22 kHz - with a ±12 dB boost/cut range. There is a two-position tape monitor, so you can route a tape deck through the EQ loop. Frequency response is 5 Hz to 100 kHz within ±0.5 dB, which covers the full audible range with plenty of headroom above it. Total harmonic distortion is rated at 0.005%, signal-to-noise ratio at 100 dB, and channel separation at 60 dB.
Input sensitivity and output level are both 0.5 V, with a maximum output of 5.5 V. Power consumption is a modest 12 watts. The chassis measures 433 x 88 x 247 mm and weighs 3.6 kg. That is a standard half-width-ish component, and it would have sat naturally in a rack with Denon's tuners and amplifiers of the period. It runs on AC 100-240 V, which suggests it was sold across multiple markets.
Documentation on this model is thin beyond the spec sheets — no original price and no service history has surfaced. What the record shows is a capable, cleanly specified 10-band equalizer from a maker known for solid engineering. If you own one and can add anything about how it sounds or holds up, the archive would welcome it. A 1991 issue of HiFI-Stereo (September 1991, p.112) lists the EQ-10 among available audio accessories, suggesting it remained on the market for several years after its debut.
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