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Technics SU-V5

Stereo Integrated DC Amplifier (1981-83)

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Technics SU-V5


Power output: 60 watts per channel into 8Ω (stereo)

Frequency response: 20Hz to 20kHz

Total harmonic distortion: 0.005%

Damping factor: 40

Input sensitivity: 0.17mV (MC), 2.5mV (MM), 150mV (line)

Signal to noise ratio: 67dB (MC), 79dB (MM), 89dB (line)

Channel separation: 55dB (line)

Output: 150mV (line)

Speaker load impedance: 4Ω to 16Ω

Dimensions: 430 x 97 x 310mm

Weight: 7.8kg


schematics   English -

instruction/owners manual   English - chirodian

instruction/owners manual   Italiano - gaspar502

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Reviewed Feb 03rd, 2016 by chiragdesai

Excellent powerhouse. I had attached CD player,Turntable & equlizer. Working in good condition & cristal clear sound with good bass. I need to change speakers. Any one have suggestion for speaker selection, Pl. share with me.

Reviewed Jan 08th, 2015 by Live_Steam_Mad

Exceptionally enjoyable amplifier! I have had two SU-V5's now, my father had a silver one that he got from a local 2nd hand shop in 1989 approx. for about 25 GBP, but he was a chain smoker and the selector switch and also volume control both started to go very bad since about 2008 onwards (probably gummed up with tar) so I had to get rid of it in 2013.

Since I prefer black audio components, I got myself the black one in very good / excellent condition from Ebay in 2013 for about 70 GBP. Again the selector switch and volume control on this one are just slightly sometimes a slight problem but only until I turn them slightly again, it's hugely more reliable than my father's.

The sound is excellent, the treble is very bright and clear without sibilance through the 1 dome tweeter of my MS Pageant Series 2 speakers, and there is plenty of really deep bass without distortion, enough to make the Pageant's LF drivers move in and out a huge amount when playing organ music with 32 foot pipes.

The speakers (50W/ch) seem to be the weak link not the amp. The noise floor is undetectable through speakers or headphones in a dead quiet room. I love the fluorescent peak power meter which still works perfectly, and it's dual readout range (x1, x100).

Now for why I love this amp. so much, it's for the incredibly MUSICAL sound. I compared it directly with my Sony STR-DA1200ES AV amp. just for kicks and the Sony is dead flat and cold and dull in comparison, so neutral and unmusical and lifeless and boring. The Technics is nothing like it, there's a night and day difference. The Technics definitely has a character to the sound, it makes anything sound lively, musical, warm and engaging and exciting.

Particularly effective with Stock, Aitken and Waterman pop music, heavy Classical Organ music, and big American Theatre organs music. This amp. has a big sound. This amp. and the MS PS2 speakers are a dream combination for me for now! Highly recommended. It's only real drawback is the lack of a remote control capability and well-known selector switch/volume control problem as they wear a little with age (I knocked off 1 point for these, maybe electrical cleaning spray might help on the bad ones?).

Reviewed Apr 03rd, 2013 by oldestpunkinargentina

I acquired this amp in mint condition from a friend back in '95 for a 2-channel home theater setup. At 60 wpc and paired with sensitive Klipsch towers. Concert DVDs sounded tonally fantastic with reasonable dynamics despite a modest damping factor of 20 at 8 ohms and 40 at 4 ohms and equal power at both impedances dynamics are more than adequate sounding even authoritative.

S/N ratio of both line and phono is not fantastic on paper if you care to look at the manual but nothing can be heard with the faintest music playing. One of the fluoro VU meters peaks a little earlier than the other but my technician said both channels were running even and that the amp's fluoros were not the best and could not be replaced or repaired, so judging for ear has since been my motto.

The thing is built like a tank; at 7.8 kg is a big chunk of all-metal amp. Not a big fan of anything Technics except for thir CD players but this puppy proved me wrong bigtime and turned out to be a keeper.

The loudness button has a center freq. of 50 hz and provides a max. boost of 9 db, very useful for small speakers and even for enhancing the punch of big subs when it's lacking. The speaker selector is managed by an audible relay which does a great job of switching between 2 pairs of speakers at any volume without a single thumping noise that could damage them. The rec selector is the most intricate I've ever seen bar some Yamaha preamps.

Compared to my Pioneer SX-980, this is a mediocre amp but at face value and compared to most current budget amps this puppy has state-ofthe-art performance, esp in the tonal department.

If you come across one of these, keep in mind it's only mediocre for its time, but better than most of today's amps, and don't pay a fortune for it.



dfsman's picture

re: SU-V5

I have this amp I purchased in Germany 1982. It is a dual voltage and has been the work horse of my audio listening for over 30 years now. It has been all over the US. All I have had to do is clean the slider switches a couple of times. It was a part of a complete technics setup. However, the cassete player lost its capstan rubber and had to go, but I still have the SL-D30 direct drive turntable, SH-8045 equilizer (awesome addtion),and SH-4020 audio timer. Long ago I had SBG-910 speakers that have since met thier dimise. Very Sad. Currently this amp is used to play MP3's off my BB. It powers a set of Fisher speakers and then some. I have this hooked to speakers in the garage and outdoor speakers. This amp is simply awesome. Class A performance and kicks ass on these IC amps of today. It draws 500 watts to power 60 watts of speaker ouput. Not efficient, but no compromise in sound quality. I mean, 0.005 THD? Really? And that was 30 years ago. Wish I could publish some pix.

re: SU-V5

I just recently got the SU_V5 amp, and SH-8015 and SH-8055 equalizers as well as a 2 technics tape players, a tuner and Phonograph. I'm having trouble setting up the AMP and Equalizer combination. if you could please help me figure how you wired you amp and equalizer together so the other components works with it.
Thank You.

Powering units up with 230

Powering units up with 230 volts when the switch is set to 110 is never going to end well.
The first thing to check are the internal fuse(s). The service manual shows this unit as having 2, but it will depend on what version of amp you have (they vary depending on country).
It is possible one of the fuses has blown, protecting the transformer.
If the fuses are intact and there is still no signs of life, then the next most likely problem is the primary winding of the transformer has blown open. The only ways to fix this is have the transformer rewound or replace it.

internal fuse?

Does the SU-V5 have an internal fuse or some other protection against powering it up with the wrong voltage selected on the selection switch? My unit was powered up on 220 with 110 selected. Does anyone know how to fix that?

about power supply.

Well when you apply 220 v with 110 selected normally the core of transformer is blow becouse the voltage of conversion is dupplicate to begining and not only the Fuse burn else the cores coils transformer, diodes, capacitors, resistors, you need open the unit and see what components are exploded, if you has a multitester you can test the components (diodes, capacitors, resistors,), except the capacitors (capacitance uF) for that you need a capacimeter. I can think that the solution is search another su-v5 for parts service and put the power supply on your amplifier. you can search on internet the part number of power transformer to this case you need rebuild it...


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