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Technics SU-3500

Stereo Integrated Amplifier (1976-77)

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Technics SU-3500


Power output: 43 watts per channel into 8Ω (stereo)

Frequency response: 5Hz to 100kHz

Total harmonic distortion: 0.08%

Damping factor: 100

Input sensitivity: 2mV (MM), 100mV (line)

Signal to noise ratio: 70dB (MM), 90dB (line)

Output: 100mV (line), 30mV (DIN), 1V (Pre out)

Speaker load impedance: 4Ω to 16Ω

Dimensions: 410 x 140 x 340mm

Weight: 10.2kg


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Reviewed Feb 12th, 2019 by profano

Simply a beautiful piece of art, that's what I think of this powerful and well built amplifier. One of my favourites in my collection for sure. So many options and inputs you can never get tired of it. If you come across one just grab it, this one is a winner!

Reviewed Dec 17th, 2018 by fj2525vl

My favourite amp from Technics.

Reviewed Jan 20th, 2018 by sssboa

Although I prefer early 1970s gear I must admit it's the most specious sound I heard, therefore it sounds great as a headphone amplifier for high impedance headphones, very 3d like dolby sound but without distortion of dolby. Not a slouch on speakers either of course. Very precise potentiometers, very stable bias and DC offset.

Reviewed Nov 17th, 2016 by guest

Zde platí pravidlo, že ne vždycky je vysoká modelová ?ada lepší. Tenhle p?ekoná spoustu svých vyšších koleg?. Výborné parametry, které nejsou jen psány na papí?e, ale 3500 je dokáže i zahrát. Klasická podstivá tranzistorová konstrukce, žádný hybryd. Vytknout se dají pouze plastové ovládací pá?ky, které p?sobí lacin?.

Reviewed Aug 11th, 2015 by anderscastle

Not long ago I was offered this amp from a friend. I was just sitting in his workshop. He felt it was a shame, cause according to him, this was a great amp and he ask me if I considering testing it out to see if it was something for me, and I thought what the hell…let's try to see how it performs, how bad could it be?
I have several of the Pioneer fire digit SX receivers and from the start I thought this couldn't by far be better than them and I had beforehand a bit of a bad impression of the Technics brand mostly due to the ‘black' plastic boxes from the nineties. I know they made some descent stuff back in the early eighties and in the seventies. So it was behind on point even before it was plug in.
Putting this amp in my car and straight away, felt that this little amp had some weight to it, and i thought;' hmm okay points for weight',
Got home plug it in straight away, on a couple of JBL 120ti and Philips CD 202 in the other end and let's see how this perform.
Miles Davis Kind of Blue: So what.
I was a bit unreal a first, the clarity of the trumpet when they first appear, and you could really feel and hear the bass, you could almost feel the wood vibrate on the upright bass.
Excellent dynamics, Superb detail.
If you find one, buy it, you won't regret it. It plays now in my main system, and has done ever since I first plug it in and it performs great no matter what I put it together with.

Reviewed Mar 18th, 2015 by Hottuna

This is a real sleeper right under the radar amplifier from Technics. Detailed and very real sounding beautiful top and midrange. Bottom end is excellent but not solid pile driver. Easy to listen to for hours.

Compared to a similar era Naim 32 & 160 pre power amp combo I preferred the Technics SU-3500 and before hearing the Technics I never thought I would say that!

Reviewed Jan 06th, 2015 by Simon Spiers

Wonderful sounding Technics amp, for superior to the Marantz 1060. Fairly powerful, built to a high standard, loads of inputs and two phono inputs for MM and 3 loading settings.
My favourite amp from Technics.



re: SU-3500

vraiment magnifique cet ampli..je l'ai comparé à un sansui 6500 et à mon gout il est au dessus..et pourtant le sansui est déja excellent..

re: SU-3500

Amplificador obra maestra de Technics, materiales y acabados de buena calidad. Componentes electrónicos que apenas se resienten con el paso del tiempo, bien seleccionados y calculados en diseño. Elementos mecánicos sin fallos, robustos, pensados para dar servicio muhos años (ya son más de 40) y cableado interno de lo mejor, con muy poco ruido.
A nivel de sonido es equilibrado, dinámico y abierto. Control de ecualizacion preciso, filtros alto y bajo progresivos. Entradas de plato con 3 valores de impedancia para cápsula MM muy útiles y un montón de características de alto nivel.
Protección de altavoces que abre la alimentación principal a la etapa de potencia en vez de hacerlo en la salida de audio. Una pareja de transistores para dar alrededor de 40W RMS sin apenas calentamiento con un factor de amortiguación de 100.
De lo mejor en sonido de los años 70 y uno de mis favoritos de la marca.

re: SU-3500

Just taken delivery of an SU-3500 (wooden case version) ill put up a review as soon as ive had a good listen , Fully refurbed this looks stunning

Ozzie 54's picture

re: SU-3500

I had this unit in the 70's brand new and did i love it. i miss it so much i wish i had a new one again. It was simply so smooth for it's time and i was more than happy with the balls this thing put out. what a pleasant memory. Pure love !!!!!!

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