Denon TU-380R / TU-380RG
The Denon TU-380R is a late-1980s FM/AM tuner that came in two versions. The black TU-380R was released in 1989 at ¥30,100. The gold TU-380RG followed a year later at ¥34,000, with wooden side panels. Past those release dates, the historical record is thin. There is no production timeline, no market positioning and no contemporary reviews. What exists is a solid manufacturer spec sheet and a handful of secondhand-market sightings.
The headline feature is the 30-station preset function, run from the included RC-114 wireless remote. That was still something of a luxury in 1989. Denon put real engineering into the FM front end. It uses three-series varactor diodes and a j-FET for high sensitivity, with a ceramic filter in the IF stage chosen for constant amplitude and delay characteristics. The PLL comparison frequency is set at 100 kHz, deliberately outside the audible band to avoid beat noise. A low-impedance output circuit (500 Ω or less) is meant to keep the signal clean regardless of what amplifier it feeds. An RF attenuator helps with interference from neighboring stations, and its ON state can be stored in memory. The AM section uses two high-sensitivity ceramic filters plus an LC-type filter to reduce distortion. It ships with a low-impedance indoor loop antenna that resists pulse noise.
The manufacturer's specs are complete for both bands. FM covers 76.0-90.0 MHz, the Japanese FM band. Usable sensitivity is 11.2 dBf, mono sensitivity is 15.3 dBf and stereo is 38.5 dBf. Signal-to-noise is rated at 82 dB mono and 78 dB stereo (audibility-corrected), with THD of 0.08% mono and 0.15% stereo at 1 kHz. Selectivity is 50 dB at ±400 kHz, capture ratio is 1.5 dB, and separation is 45 dB. AM spans 522-1629 kHz with an 18 µV practical sensitivity. Power consumption is a modest 8W at 100 VAC. The TU-380R measures 434 × 73 × 287 mm and weighs 3.1 kg. The TU-380RG is slightly wider at 470 mm because of the wood side panels.
Used prices are modest. Japanese secondhand shops have sold these for as little as ¥324 at Hardoff, with another Hardoff sighting around ¥3,000 plus tax. Russian listings have asked 5,000-8,000 rubles, often with the manual, remote and antenna included. One listing mentions 220V operation, but that conflicts with the manufacturer's 100 VAC spec. It is likely a modification, so treat it with skepticism.
The documentation gap is real, but the spec sheet that survives suggests a well-engineered, remote-friendly tuner aimed at the practical listener rather than the audiophile purist.
Similar items on eBay
No exact Denon TU-380R listings are live right now — these searches show current Denon and similar vintage audio gear on eBay:
As an eBay Partner, we earn from qualifying purchases. This helps support our independent vintage technology research.
Related Models
- Denon TU-701 (1976)
- Denon 680NAB
- Denon 700-AM
- Denon DTU-1600AL
- Denon DTU-S10
- Kenwood KR 3200 (1973-1975)
- Kenwood KR 3400 (1977-1979)
- Kenwood KR 4070 (1977-1979)
- Kenwood KR 4200 (1975-1977)
- Marantz 1515 (1976-1978)