I think the stunning Technics SU-V8 is one of the most beautiful amplifiers from the golden age. As part of my first Technics Month, let’s take a look at the classic SU-V8 integrated amplifier.
Yep, it’s #TechnicsMonth at Liquid Audio. What exactly that means, I don’t know, but I’m going to focus only on Technics for the next couple of articles. What better to start than with the stunning SU-V8 integrated amplifier.



Before we go too much further, feel free to watch my accompanying video on this SU-V8 clean, repair and service:
Features
The Technics SU-V8 was the top integrated amplifier from Technics in the early ’80s. The 110 Watt per channel beauty featured some of the buzz-tech so typical of the time like ‘New Class A’ which isn’t class A, and ‘Super Bass’ which boosts the bass. As with most of these features, leave it turned off.


This stunning silver amplifier has gorgeous machined aluminium knobs reminiscent of Accuphase gear and every switch and control feels solid, smooth and secure. It’s also a great sounding amp, solidly built and very serviceable. The SU-V8 is the kind of amplifier you might buy and keep for a really long time.
Anyhow, Technics was really in its stride during this era and consistently producing some of the sexiest looking and sounding hi-fi gear. Who could forget the futuristic SL-10 linear tracking turntable for example? The SU-V8 was the amp that matched the SL-10 and the other gear they sold, like the SB-8 honeycomb speakers.
You can read more about the SU-V8 at the Audio-Database entry for the amp and don’t forget to check out the awesome brochure @ HiFi Engine!
Specifications (adapted from Audio-Database)
Form | Integrated DC amplifier |
Line Level Specifications | |
Effective output power | 110W/ch (8 ohms) |
THD | 0.003% (-3dB, 20Hz – 20kHz) |
Power bandwidth | 5Hz – 100kHz |
Frequency response | DC-20kHz+0 -0.1dB DC-150kHz+0 -3dB |
TIM | Too low to measure |
SN ratio (IHF-A, DC) | 106dB |
Noise (straight DC) | 550uV |
Damping factor (8ohms) | 60 |
Load impedance | main or remote: 4 – 16 ohms main + remote: 8 – 16 ohms |
Other Specifications | |
Input sensitivity | Phono MM: 2.5mV / 47 kohm Phono MC: 170uV / 47 ohms Line: 150mV / 47kohm |
Phono SN ratio | MM:88dB MC: 71dB (250uV input) |
Phono frequency response | 30Hz – 15kHz, +/- 0.3dB |
Filter | High: 7kHz – 6dB / oct Subsonic: 20Hz – 12dB / oct |
Loudness control | + 7dB (50Hz, Volume – 30dB) |
General | |
Year manufactured | 1980 – 1984 |
Power consumption | 260W |
Dimensions | 430 W x 153 H x 351 D mm |
Weight | 15.7kg |
Problems
This poor old SU-V8 suffered so badly from dirt and previous poor service that it hardly worked at all. This is a perfect example of why getting the right service is critical. This thing ran on one channel, buzzed and popped when controls were actuated, protection kicked in all the time and was generally one very unhappy amplifier!
In fact, the grime level in this one was so great that it took me three hours of cleaning and servicing switches, controls and boards, just to remove the goop that had been sprayed into this thing over the years and get her working reliably again!
There are quite a few adjustments in these higher-end New Class A models, so all that had to be attended to as well, plus there was a broken board. For the rest of this article, we’ll get her back up and running and chat about why these are such a classic piece of gear.








Cleaning
You can’t do anything much or even know what’s going on until you properly clean a very dirty piece of equipment like this. It’s always the starting point when servicing something like this, but it’s tedious. Unfortunately, there are no shortcuts.












Repairs
Once I’ve cleaned and dried everything, reworked the boards as needed and thoroughly serviced the switches and controls, I generally start repairing things. In this case, the driver board needed fixing, as did the ‘New Class A’ logo lighting on the front panel.








Testing & Adjustment
Once the repairs are done, it’s time to allow the amp to warm up, carefully test everything and then make all the adjustments, as per the service manual.








The Finished Product
I try to include quotes from owners when they get the gear back, so so here’s what this lovely owner said when he plugged everything back in:
Wow, this sounds amazing!
This put a smile on my face and he’s right, it sounds fantastic, plus just look at the thing! My customer bought this amplifier for next to nothing because it barely worked. He spent some money having it properly cared for and now has a perfectly working example of a SU-V8, an iconic Japanese hi-fi amplifier. You’ve gotta be happy with that.





If you would like me to service, repair or restore your Technics SU-V8 or any other Technics amplifier, don’t hesitate to get in touch.
Hello Crina,
Ask the seller, he may have it but its not listed. He still had the V9 input board when i asked him. With luck he may have it, Being in Italy the shipping will be less.
https://www.ebay.com.au/usr/hifi-teile?_trksid=p2047675.l2559
Greetings from Australia
Sam
And don’t forget folks that there are potentially other remote switch assemblies that will also work. The trick is finding and trying some. If there is a local SU-V9 being parted out though, that could be very useful.
Hi Sam,
thank you very much for your help.
I write from Italy and it would be great if the cable was still available.
I did a search on Ebay but couldn’t find the SU-V9 cable! 🙁
Hi Crina
One of my V8s input selector cable broke also and i found one on ebay, but I was fortunate it was being parted out.
There is a Technics SU-V9, i got a new inputboard from the seller for my V9, It should fit a V8, ask the seller he may have it. Shipping is pretty steep for a small cable. He still may have the cable for the input selector
https://www.ebay.com.au/itm/264301163015
Hi,
Congratulations on the excellent article, very useful.
I have a beautiful SU-V8 with a problem.
The input selector has broken and I can’t find any spare parts.
can you help me?
this is what i’m looking for:
https://i.postimg.cc/zvkP01Jp/IMG-20191010-170534.jpg
Thanks
Hi, thanks and glad you found the article useful. I don’t have a switch like that in stock but this system was widely used. I am sometimes able to find parts like this given time and where equipment comes to me for service or repair. I’d need the unit here for physical matching in terms of length, number of detent positions etc. Do you live locally? I don’t generally sell or ship service parts for reasons relating to time, cost and the aforementioned need for matching in this case.
Hi there is it recommended to fit a cooling fan to the SU-V8 amp
Hi Joe, it’s not necessary under normal usage conditions, ie adequate ventilation, amp sitting in free space, not in a cabinet, sensible speaker load etc. Generally, these things don’t run hot, if yours is, this indicates something else is not right.
Can you tell me what the foaming cleaner you used to wash the amplifier is called ?
Hi Jeremy, thanks for your question. I love helping my readers but I like keeping them alive as well! I don’t generally go into details about how I wash equipment for a number of reasons. There are technical considerations and the method varies according to the type of equipment, boards and dirt present. Most importantly though, it has the potential to kill you if you get it wrong. For these reasons, I strongly suggest not washing electronic equipment unless you have access to a temperature-controlled drying oven and really know what you are doing. I hope this makes some sense, let me know if you have any other questions.
They are a great amplifers i have 2 , a black and silver, and would never part with them. Great to see them getting revived and brought back to spec
Hi Sam, you are very lucky to own two of these, thanks for your comment and glad you enjoyed the article!