Luxman R-106 (1986)
A solid-state receiver that runs hot enough to be a problem.
Overview
By 1986, Luxman had moved hard into solid-state design, and the R-106 is a good example of its mid-80s thinking. Luxman marketed it as a "Digital Synthesized AM/FM Stereo Receiver." It was built for the buyer who wanted modern convenience, a good tuner, and 60 watts per channel of clean sound, all in a single chassis from Lux Corporation, Japan.
Owners describe it as "affordable, luxury from the mid-1980's." It wasn't a budget receiver, but it wasn't priced like a flagship either. It has a phono stage for vinyl, a full set of tape in/out options, TV/VCR connectivity, and remote control capability. The digital VTF (Variable Tuning Frequency) display gives bright, clear tuning info, which looked futuristic next to the analog dials still common at the time.
Specifications
| Manufacturer | Lux Corporation, Japan |
| Model | R-106 |
| Year of Manufacture | 1986 |
| Type | Digital Synthesized AM/FM Stereo Receiver |
| Power Output | 60 watts per channel into 8 ohms |
| Total Harmonic Distortion | 0.05% |
| Frequency Response | Phono: 20Hz to 20kHz (±0.5dB). Aux, Tape: 10Hz to 70kHz (+0, -3dB) |
| Signal-to-Noise Ratio | Phono: 76dB (IHF A). Aux, Tape: 90dB (IHF A) |
| Input Sensitivity/Impedance | Phono (MM): 2.5mV/47kΩ. Aux, Tape: 150mV/47kΩ |
| Inputs | Phono (MM), Tuner, Aux, Tape 1, Tape 2 |
| Outputs | 2 x Tape outputs, 2 x speaker outputs |
| Tone Control | Bass: ±10dB at 100Hz. Treble: ±10dB at 10kHz |
| Loudness Control | +6dB at 100Hz |
| Power Requirements | 120V, 60Hz (for North American model) |
| Power Consumption | 170 watts |
| Dimensions (W x H x D) | 438 x 144 x 328 mm (17-1/4" x 5-11/16" x 12-15/16") |
| Weight | 10.5 kg (23.1 lbs) |
| Tuning Range | FM, MW |
Key Features
Duo-Beta Circuitry: The Engine Room
Inside is Luxman's proprietary "Duo-Beta Circuitry," a design approach aimed at minimizing distortion and maximizing transistor efficiency. The exact technical implementation isn't detailed in the fact sheet. The published numbers are a THD rating of just 0.05% and a frequency response that stretches well beyond the audible range on line inputs. Users report "NICE Sound!" and "60wpc of clean sound."
Digital Synthesis & Tuner Performance
The R-106's digital synthesized tuning was a major upgrade over analog variable capacitors. It gives precise station selection, excellent stability, and strong reception. One reviewer called the tuner "very good." The digital VTF display makes tuning easy to read, which beats needle meters and dial lights.
Connectivity for the Analog Lifestyle
This receiver was built for the late-80s home audio setup. It has a dedicated phono (MM) input, two tape loops, aux, and TV/VCR in/outs, enough to anchor a full analog system. A preamp-out/power-amp-in loop is implied by the separate tape in/out and signal flow, which gives room to expand later. It worked with a remote, the RC-406, which still turns up on the secondhand market for around $34, though many units now sell without one.
The Heat Pipe Quandary
Now the hot part. Owners consistently report that the R-106 runs "extremely hot." It uses a unique "Heat Pipe" cooling system: a copper tube filled with refrigerant, connecting a small heatsink on the output transistors to a finned radiator on the rear. It's an elegant solution when it works. These heat pipes can fail when they lose their internal charge, and as one technician noted, Luxman stopped making replacements for these assemblies before 2005. If an R-106 is overheating, the first step is checking the bias in each channel. Drift in the bias circuit, possibly from past adjustments or failing transistors or pots, could be the real culprit. If the heat pipe itself is dead, the repair might require improvisation.
Historical Context
The R-106 was produced in 1986, when receivers were getting more integrated. Digital tuning, remote controls, and expanded connectivity were becoming standard. One owner believes it was "their top of the line remote receiver in the late eighties," though that is not officially confirmed and remains unverified. Today it's listed under "Discontinued" integrated amplifiers on Luxman's own website.
Collectibility & Value
The R-106 isn't a blue-chip collector's item, and it isn't turning up at auctions for thousands. As of 2026, working units are listed on eBay for as low as $99, with most between $119 and $164. Many are marked "AS IS" with the caveat that the seller couldn't test the phono input. "Very Good" condition units with shipping have asked $120, and one Canadian listing recently asked $145. The real premium goes to restored units: one electronically refurbished R-106 was listed for $379 in July 2024, nearly triple the price of a standard used model.
A stock unit is a functional vintage receiver at a fair price. A restored one has the heat pipe and bias issues addressed. A buyer should ask whether it runs cool, whether the display works, whether the remote is included, and whether someone has checked the bias. One owner confirmed that "sonically and operationally it is fine." A receiver with a dead heat pipe can cook itself without any warning.
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