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Pioneer SX-939 Vintage Stereo Receiver – 70 WPC, Cherry Wood - Image 1

Pioneer SX-939 Vintage Stereo Receiver – 70 WPC, Cherry Wood - Image 2

Pioneer SX-939 Vintage Stereo Receiver – 70 WPC, Cherry Wood

Pioneer SX-939 Vintage Stereo Receiver – 70 WPC, Cherry Wood - Image 3

Pioneer SX-939 Vintage Stereo Receiver – 70 WPC, Cherry Wood - Image 4

Pioneer

Pioneer SX-939 Vintage Stereo Receiver – 70 WPC, Cherry Wood

Name: Pioneer SX-939 Vintage Stereo Receiver – 70 WPC, Cherry Wood
Brand: Pioneer
SKU: 9791
Price: 1595.00 CAD
Availability: OutOfStock

$1,595.00

Out of stock

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Description

Gorgeous, Vintage 70 WPC Pioneer SX-939 Stereo Receiver in Custom Cherry Wood cabinet

This exceptional Japanese-manufactured Pioneer SX-939 AM/FM stereo receiver delivers the warm, rich sound that made the SX series legendary during the golden era of 1970s hi-fi. Originally part of Pioneer’s prestigious SX line, this 70-watt per channel powerhouse has been transformed with stunning custom cherry wood cabinetry crafted by our master woodworker, elevating this already impressive receiver to a true work of art.

This fully serviced receiver features Pioneer’s renowned parallel push-pull OCL power amplifier with less than 0.3% total harmonic distortion, paired with a completely new PLL MPX circuit and frequency linear 4-gang variable capacitor. The unit has undergone our comprehensive Level 2 service protocol, ensuring optimal performance and reliability. While there is some light wear along the top metal lip of the faceplate, this character-adding patina is typical for a 50+ year old component and tells the story of this remarkable receiver’s journey through the decades.

The custom cherry wood cabinet is brand new and absolutely gorgeous, providing a stunning contrast to the classic silver faceplate. The receiver lights up beautifully with its signature illuminated dial, and the sound quality is fantastic with tons of power to drive virtually any speakers.

Product Specifications:

Power Output: 70 watts per channel into 8 ohms (80 watts into 4 ohms)

Frequency Response: 10Hz to 40kHz

Total Harmonic Distortion: 0.3%

Signal-to-Noise Ratio: 70dB (MM phono), 95dB (line)

Tuning Range: FM, MW (AM)

Inputs: Dual phono (MM), microphone, auxiliary, two tape inputs, Dolby NR adapter

Outputs: Pre-out, tape record, headphone jack

Speaker Connections: Three pairs of speakers

Twin Tone Control System with bass and treble main/sub controls

Semiconductors: 3 FET, 4 IC, 57 transistors, 39 diodes

Dimensions: 20.5 x 6.9 x 16.5 inches (520 x 175 x 420 mm)
Weight: 40.8 lbs (18.5 kg)

This Japanese-crafted Pioneer SX-939 represents the pinnacle of 1970s receiver design, combining exceptional build quality with the musical warmth that made Pioneer legendary. The custom cherry wood cabinet transforms this already desirable vintage receiver into a centerpiece worthy of any audiophile’s system, while our Level 2 service should ensure years of reliable enjoyment.

Asking $1595; buy with confidence and benefit from Radique’s “Bumper to Bumper” warranty and Perpetual trade back policy.

Additional information

Weight	45 lbs
Dimensions	24.5 × 20.5 × 10.9 in

About brand

Pioneer at Radique

We service Pioneer, too. Bring us your own Pioneer receivers, amplifiers, tuners, turntables, cassette decks and CD players for repair, servicing or restoration (not reel-to-reel decks), with a 90-day warranty on the work. See our Audio Service page

Pioneer began in Tokyo in January 1938, when Nozomu Matsumoto set up shop around the A-8 speaker he had built the year before. By the late 1970s its SX receivers were at the heart of the hi-fi power race. We carry Pioneer stereo receivers and AV receivers, CD players, cassette decks, tuners and equalizers. We've had more than 240 Pioneer listings so far, covering 140 different models. Every used Pioneer here is inspected, tested and serviced as required, then photographed in-house and covered by our Bumper-to-Bumper Warranty and Perpetual Trade-Back Program. Don't see the model you want? Tell us on First Dibs and we'll email you when one arrives.

Pioneer is one of our two top-selling brands of vintage amps and receivers, along with Marantz. Our five best-selling Pioneer models so far: the SX-650, SX-750, SX-580, SX-780 and SX-680, all vintage stereo receivers from the 1976 and 1978 SX families. We also offer our custom cherry cabinets for these vintage Pioneers, hand-made from all-natural Ottawa Valley cherry, and we've upgraded dozens of Pioneers with them so far.

The Pioneer story, 1938 to today

Nozomu Matsumoto developed the A-8 speaker in 1937, and in January 1938 he set up Fukuin Shokai Denki Seisakusho in Tokyo. "Pioneer" was first the name of that speaker. Some histories give 1936 in Osaka as the start, but Pioneer dates itself to January 1938 in Tokyo. The company was incorporated in 1947 and renamed Pioneer Electronic Corporation in 1961.

Stereo and the US. In 1962 Pioneer introduced the PSC-5A, which it calls the first stereo with separate speaker cabinets, and its first PL turntables. Pioneer Electronics U.S.A. was founded in New York in 1966.

The power race. After a 1974 US Federal Trade Commission rule tightened how amplifier power was rated, receiver makers competed on watts. Pioneer's SX-1250 of 1976 was rated at 160 watts per channel, and the SX-1980 of 1978 to 1980 at 270.

CD and Elite. The P-D1 of 1982 was Pioneer's first CD player, and Elite-branded components were on sale by 1985.

Today. Pioneer sold its home audio business to Onkyo in 2015, keeping its car and DJ businesses, and Pioneer-branded home theatre gear was later made under licence. In December 2025 CarUX, part of Taiwan's Innolux, completed its purchase of Pioneer Corporation, which now focuses on in-car products.

Which Pioneer is which?

Early-1970s SX receivers: models such as the SX-424 to SX-828, rated at about 15 to 50 watts per channel.

The 1976 "x50" SX receivers: from the SX-450 at 15 watts per channel up to the SX-1250 at 160. Our best-selling SX-650 and SX-750 come from this family.

The 1978 "x80" SX receivers: including the SX-580, SX-680 and SX-780 we sell most, up to the SX-1980 flagship with quartz-lock tuning, which weighs more than 35 kg.

Spec and Exclusive separates: higher-end amplifiers such as the Spec-1 preamplifier (1976 to 1980) and the Exclusive C3/M3 pair (1974).

Elite: Pioneer's upper line from the mid-1980s, for example the PD-9010X CD player.

PL turntables, CT cassette decks and CD players: PL turntables from 1962, such as the PL-12 and the linear-tracking PL-L1; CT decks such as the three-head CT-F1000; and CD players from the 1982 P-D1 to magazine-loading changers such as the PD-M6.

Buying used Pioneer: what to check

Controls and switches. Crackle when you turn a control or work a switch usually means dirt, and restorers clean every pot and switch.

Capacitors. Electrolytic capacitors in 1970s receivers are often past their best, and full restorations replace them.

Big SX models. Owners and restorers report heat stress on the power-supply board of large receivers such as the SX-1250. Ask what has been done.

Relay, lamps and bias. The protection relay is a common replacement, dial lamps burn out and are often converted to LED, and restorers set the bias and DC offset.

Cassette decks. Check the heads, fast-forward and rewind, Dolby and every button. Belts age even when the deck looks perfect.

Everything we list is inspected, tested and serviced as required here, and comes with our warranty.