Sony TA-3650 Vintage Integrated Amplifier – 55 WPC
$695.00
Out of stock
Get first dibs on the next one
Sony TA-3650 55 Watt Per Channel Stereo Integrated Amplifier – Classic Japanese Hi-Fi Power
This pristine example of Japanese audio engineering from Sony represents the golden age of stereo amplification with exceptional build quality and sonic performance. The TA-3650 delivers 55 watts per channel into 8 ohms with remarkably low distortion and impressive dynamic headroom, making it capable of driving a wide range of speakers with authority and finesse. This particular example includes the original optional wood-grain side panels, which were sold separately as model TAC-15 when new.
Built during Sony’s 1976-1979 production run, this amplifier features a sophisticated direct-coupled pure complementary output design with dual FET input stages for enhanced transparency. The comprehensive connectivity includes two phono inputs for MM cartridges, tuner, auxiliary, and dual tape loops with full recording capabilities. The precision-detent volume control and comprehensive tone shaping with bass and treble controls, plus high and low filters, provide exceptional flexibility for any audio system.
The attractive wood-grain finish side panels complement the brushed aluminum faceplate beautifully. These panels feature a simulated wood appearance rather than real wood veneer, but provide the classic vintage aesthetic that makes these amplifiers so desirable among collectors and enthusiasts. Many units are found without these optional panels, making this a particularly complete example.
The robust construction utilizes a substantial power supply with dual 10,000µF reservoir capacitors, ensuring excellent transient response and dynamic power delivery. The amplifier’s clean, clinical yet musical sound signature makes it exceptionally versatile across all music genres, from delicate acoustic performances to powerful rock presentations.
Product Specifications:
Continuous Power Output: 55W + 55W (8Ω, 20Hz-20kHz)
Dynamic Power: 85W + 85W (8Ω), 100W + 100W (4Ω)
Total Harmonic Distortion: 0.1% at rated output, 0.03% at 1W
Frequency Response: 5Hz – 40kHz (+0dB, -2dB)
Signal-to-Noise Ratio: 70dB (phono MM), 90dB (line)
Damping Factor: 35 (8Ω)
Input Sensitivity: 2.5mV (MM phono), 150mV (line)
Tone Controls: Bass ±10dB (50Hz/100Hz), Treble ±10dB (10kHz/20kHz)
Filters: High filter (-6dB/octave above 10kHz), Low filter (-6dB/octave below 30Hz)
Semiconductors: 4 FET, 43 transistors, 27 diodes
Dimensions: 17.1 x 6.7 x 12.8 inches (430 x 170 x 325 mm)
Weight: 26.5 lbs (12 kg)
This exceptionally well-preserved Japanese-made amplifier has undergone our Level One service and testing which should ensure many more years of reliable performance ahead. Complete with its original optional wood-grain side panels and timeless design, the TA-3650 represents outstanding value in vintage hi-fi and will complement any serious audio system beautifully.
Asking $695; buy with confidence and benefit from Radique’s “Bumper to Bumper” warranty and Perpetual trade back policy.
| Weight | 30 lbs |
|---|---|
| Dimensions | 16.8 × 21.1 × 10.7 in |
Sony began in Tokyo in 1946, founded by Masaru Ibuka and Akio Morita, and it helped bring the world the Walkman and the compact disc. We carry Sony stereo and AV receivers, CD players, cassette decks, amplifiers and speakers. We've had more than 220 Sony listings so far, covering more than 185 different models. Every used Sony 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.
Sony models we've sold more than once include the TC-K61 cassette deck, the CDP-CE305 and CDP-C335 CD players, the STR-DA5700ES AV receiver and the STR-4800SD stereo receiver.
The Sony story, 1946 to today
Masaru Ibuka and Akio Morita founded Tokyo Tsushin Kogyo ("Totsuko") in Tokyo in 1946, growing out of a radio repair business Ibuka had started the year before. The company was renamed Sony in 1958.
Tape and transistors. The G-model tape recorder of 1950 is described as Japan's first, and the TR-55 transistor radio of 1955 was the first Sony-branded product.
ES. Sony describes the TA-1120 integrated amplifier of 1965 as the first all-silicon-transistor stereo amplifier and dates its ES ("Elevated Standard") line from it.
Walkman and CD. The Walkman went on sale in Japan in July 1979. Sony worked with Philips on the compact disc, and Sony's CDP-101 was among the first CD players on sale in Japan in October 1982. Sony still makes ES AV receivers.
Which Sony is which?
STR receivers: stereo receivers from the late 1960s on, such as the STR-6120, and later AV receivers, including ES models.
TA amplifiers and ES separates: from the TA-1120 to the TA-E86 preamplifier and TA-N86 power amplifier (1978).
CDP CD players: from the CDP-101 (1982) and CDP-701ES (1983) to changers such as the CDP-CE305 and CDP-C335 we sell often.
TC tape decks: reel-to-reel recorders until 1985, and cassette decks such as the TC-K61 and the three-head TC-K777ES.
SS speakers: such as the SS-G7 floorstanders of 1978.
Buying used Sony: what to check
CD players. Open and close the drawer several times; hesitation can be an early sign of trouble. Laser pickups wear, skipping is a symptom, and tray belts age.
Cassette decks. Belts dry out and cause slipping or uneven playback, and worn heads dull the sound. Run fast-forward and rewind, and check Dolby.
Amplifiers and receivers. Noisy switches and dirty relay contacts cause many faults, and bias settings drift with age. On tuners, look for blown bulbs and broken dial cords.
Everything we list is inspected, tested and serviced as required here, and comes with our warranty.
Related Products
Braun Atelier A1 Vintage Integrated Amp – 55 WPC, Pre-Out, Japan
The component that makes the rest of an Atelier system work, and the one people hunting these usually look for first. 55 watts per channel into 8 ohms and 80 into 4, with a preamplifier section that separates from the power stage — engineering that is not an afterthought to the industrial design. 445 mm wide and 70 mm tall, the exact footprint of the T1 tuner and C1 deck, so the stack reads as one machined object. Made in Japan for Braun. Good condition.
Arcam Alpha 5 Integrated Amplifier – 40 WPC, Made in England
A British integrated amplifier from Arcam's Cambridge factory, 40 watts a side, built on the principle that anything which does not improve the sound does not go in the box.
✔️ Condition: Very Good — tested and working properly
✔️ Covered by Radique Warranty
✔️ Includes Perpetual Trade-Back Program eligibility
✔️ Expertly packed for safe shipping
Harman Kardon PM640VXi Vintage Integrated Amp – 45 WPC, Japan
A 45-watt amplifier built by a company that spent the 1980s arguing the watts were the wrong thing to look at.
✔️ Condition: Very Good
✔️ Covered by Radique Warranty
✔️ Includes Perpetual Trade-Back Program eligibility
✔️ Expertly packed for safe shipping
Marantz 1200 Vintage Integrated Amplifier – 100 WPC, Made in USA
Marantz's flagship integrated of the early seventies, built in Sun Valley, California, through our Level 2 service and playing as it should.
✔️ Very Good condition — faceplate and knobs present well, light marks of age; offered in the stock black metal case
✔️ Through our Level 2 service — a substantial round of component replacement on the bench, then bias and offset set and the amp run in
✔️ Covered by Radique Warranty
✔️ Includes Perpetual Trade-Back Program eligibility
✔️ Expertly packed for safe shipping
Marantz 1070 Vintage Integrated Amplifier – 35 WPC, Serviced
A slim mid-seventies Marantz integrated amplifier, through our Level 1 service, in very good condition, with a phono stage, a three-band tone section and a microphone input on the front panel.
✔️ Very good condition — free of significant marks
✔️ Through our Level 1 service on our own bench
✔️ MM phono stage, three-band tone sliders and a front-panel mic input
✔️ Covered by Radique Warranty
✔️ Includes Perpetual Trade-Back Program eligibility
✔️ Expertly packed for safe shipping
Blaupunkt Micronic A-60 Micro Amplifier – 20 WPC, Made in Japan
A rare Blaupunkt Micronic A-60 micro amplifier from 1981, designed in Germany and made in Japan: 20 watts per channel with LED power meters, in a case 25 cm wide.
✔️ Tested on our bench, input, outputs and every control
✔️ Very good condition
✔️ 20 WPC, LED power meters, one RCA input
✔️ Covered by Radique Warranty
✔️ Includes Perpetual Trade-Back Program eligibility
✔️ Expertly packed for safe shipping
Blaupunkt Micronic A-60 + T-60 Micro System – 20 WPC, Bundle
The complete Blaupunkt Micronic 60 system from 1981, the A-60 amplifier and the matching T-60 AM/FM tuner and preamplifier, together for less than buying them separately.
✔️ Tested on our bench, both units
✔️ Both very good
✔️ Radio, phono, tape and a 20-watt amplifier in a stack 25 cm wide
✔️ Covered by Radique Warranty
✔️ Includes Perpetual Trade-Back Program eligibility
✔️ Expertly packed for safe shipping
