Technics SU V9 Power Amplifier. An underrated monster worth consideration. Fantastic sound.

A great shape Technics SU-V9 to add to my collection. It is one of the best sounding amps I own now, and it has dethroned my Luxman LV103 as my studio amp. This thing has balls, and is unbelievably clean.

[@THOMMGB]

Dave, I've got a little Technics SU-Z45 that works very well except for needing its switches and controls cleaned. Your guide to servicing and cleaning all those controls will give me the courage to get into mine and give it the cleaning it needs and deserves.

[@andybrook1585]

I have the SUV909 version, bought new by my father in law in Germany when stationed there in 1982. (similar to a few others commenting here!) It’s travelled from Germany to the UK, and is now in Australia. Monster amp, and so loud

[@user-jm7ou6vg5d]

Es un amplificador de gran potencia en casa es para escuchar en volumen 2 para que tenga un sonido agradable y saber regular el bajo y el fino

[@raymond9839]

Just today I turned mine on to test it for sale, and the exact same problem! I did not pay attention to that flat black cable that was moving the switch in the rear. Sprayed it with Caig Fader Lube, viola FIXED! Thanks for the video! And yes it is a very powerful amp that my cousin was a one owner of till he passed, it is a great sounding, heavy piece from 1981.

[@e.j589]

dave, I wanted to thank you for your video because after reading it I looked for and found a technics su v9 in Germany that I received a few weeks ago. I must say that I already had amps of great renown and the technics made everyone agree. the sound is pure and detailed whether at low or high volume, the music scene is incredible. I plugged it into my jbl l112 and the result is amazing. really thank you because the value for money is just perfect.

[@12voltvids]

Yes this one is a hidden gem of an amplifier.

[@ashleycox432]

One of the best amps Technics made, I've wanted one of those for a long time but they're hard to find in good condition. Bags of power and beautiful sound.

[@craigstaggs8597]

They sound shit , overly bright and get really muddled on anything complex .

[@mrpresidentatruevintageaud3128]

Pls share feedback of technics suv-10x

[@ndf8095]

this brought back memories of my technics v3 amp i had in my teens in the UK........loved that thing, loved the video too

[@12voltvids]

Well the v3 is not a v9. I love this amp and love what i paid for it even more. (Free)

[@michaelmurphy5029]

Very nice video, enjoy seeing your experienced troubleshooting!

[@12voltvids]

This is nothing. Wait for the Luxman LV103 heading to the cloud as soon as my computer finishes rendering it. The LV103 is a hybrid tube / mosfet amp, and it has a few problems that took some head scratching to figure it out to the 1 part that was causing the problem.

[@bbelen61]

Thank you for the video. I have the same amp but unable to use because of dirty switches. I will be cleaning them soon now that you have shared the information. Thank you!!!!

[@markmarkofkane8167]

Reminds me of the record button on tape deck going to a slide switch on the other end of the board. I enjoy your videos.

[@theotherchannel2279]

I bought a nice Technics SU-V4X because these are also underrated for what they can do. I wanted the pass through for extra connections. And it sounds fantastic.

[@Budro4764]

I love Technic's products...... When I was a mobile Dee Jay I had 2 set ups..... I had 2 Technic's turntables on one set up and 2 Hitachi's on the other set up...... All four turn tables has the S Tone arms style.... I used Ortofon styli , they were pricey but sounded great............ Great video as always Mon Ami.......

[@12voltvids]

Hope to put this one in service in my studio, perhaps tomorrow I will hook it up. Going to be a busy day tomorrow. Have to get my new company laptop provisioned. I have no idea WHY I AM DOING THIS ON MY DAY OFF, I should say screw it, and book 4 hours out of the load at work to do it. Only reason I will do it at home on my off time is because I know there will be problems with air card and VPN and crap that will need to talk to the IT guy to get help doing it.

[@fulwell1]

They were beautiful amps, very well put together and to be honest we rarely saw them in the workshop. I never could afford one back then, and doubt I could find one in good nick nowadays. Great video as always :)

[@12voltvids]

Heavy as hell.

[@angelodagnolo984]

I bought mine new back in the day, can't remember the actual cost, but it was a lot of money...... its awesome to see one still working. The MC circuit was really good too, I was so impressed when I changed my TT from MM to MC, great amp.

[@seansweeney3532]

Just lucked into a nice one myself. And while I usually sell these, I'm holding onto this one for a while. I've had a KM German preamp for years... and now I'll use this one for my mids and highs. Had one of those sandui 150wpc power bricks...no controls, just the big LED level readout... so that one will sell... just have to figure out how to fire the subs off the Technics.

[@crispuloveneracion2067]

Thank you for this video, I dug out this amp (Japanese version 100V) from under my near trash pile. It was running great until the switches cut out on me. Cleaned it out using your suggestion, the switches in the back of the unit and the bottom panel. It is now running and all the controls (except the Phono 'cause I have to dig my turntable out, too) check out. I will be connecting it to my larger speakers later today. Still have the laundry to do. 😀😃😄

[@71Fenderv22]

That is one beautiful amp, great video.

[@12voltvids]

I like it. Sounds great in my studio

[@TrevorsBench]

That is a nice rig, well done

[@brianwood5220]

Love Technics. Great video. Thanks

[@craigstaggs8597]

Its tequniquies.... As Dave calls it ....

[@gordthor5351]

You scored. That is a nice integrated amp and it looks to be in great physical condition.

[@12voltvids]

Hooked it up tonight. Very impressed. Now I find out what other equipment died since the last time I used it. Played my minidisk. Played disc perfectly. Was 1 track of test tone I went to delete. When writing to disk it died and now won't read. Amp sounds great and drives my altec lansing 315 really well. The slm1 turntable sounds great through it. I may have found a new favorite amp.

[@alvinpillay9995]

Lovely Amp. I got the suvx800. These technics are collectors items now

[@bobadornetto6599]

I purchased the same unit back in 1982 when I was stationed in Germany. I have the exact same issue with mine at the moment. I'll be purchasing some De-oxit and cleaning the contacts. I bought this and a Technics Space dimension controller SH8040 and the amp for $353.00, times have changed. I still have my Technics SL-10 turntable and ADC Sound Shaper Twenty graphic equalizer, Klipsch and AR58's playing the classics

[@davidmoss9679]

Lol same here raf wildenrath 1982 bought brand new

[@MXSLICK]

that is a really beautiful amp

[@12voltvids]

Thanks I like it. Getting the matching tuner for it too.

[@michaelwolak3098]

Hi another great video if all repairs could be that simple and thanks for hocus pocus will look on i tunes for it Mike

[@tharkthax3960]

I used to have one of these! My friend pulled it from a skip. Put it into tech to get repaired, was only a faulty transistor. Had it for years. Thanks for explaining what new class A means 🙂

[@retrogamer33]

I always wondered what New Class A meant. I know now.

[@12voltvids]

A real class A is single ended. Class B Push pull. The problem with class B is cross over distortion when switching from 1 transistor to the other. Class AB adds a slight bias to keep the transistors idling so at no signal both the transistors are in very slight conduction. The non active transistor does go off completely when there is a signal present but it also comes back on before the other one goes into cutoff. This is how most amps are biased. A true class B has high distortion. New class A is still a push pull, they just drive plenty of bias to both transistors soothe transistors are in full conduction and passing a fair bit of current even when there is no sound. Right through the max power limit of the class A bias limit, both transistors stay in conduction. This is very power inefficient and these units will draw a fair bit of power even when producing no or very little sound. I believe the bias drops down with volume to save power but at the max level for class A operation the transistors are wasting much power as heat. Once the power level goes beyond the limit for class A operation the bias drops to the AB bias level. This happens instantly. So these units uses for background music will spend the vast majority of their time in the power hungry class A mode but the distortion is almost immeasurable. Will be interesting to see how this compares to my old luxman hybrid.

[@tharkthax3960]

@@12voltvids outstanding explanation- thankyou. I used to have a marantz pm6200, beautiful amp. Had a class A mode switch which gave 30w class A sound. Normal mode was class AB which was much more powerful, i enjoyed class A on for intricate music, sitting in the dark. Was stunning. Funny how music comes to life when its pitch black! I gave the amp to my folks few years back and they barely use it! I use a NAD c352 these days. Superb amp. And of course i changed out the fail prone crappy caps with decent ones!!

[@pliedtka]

So Dave this is sort of like a sliding bias, for low level amp operating in very overbiased class AB. Many DIY people commonly set bias at way over 50mA per pair. As for the tone controls, I learned to live without if spkrs have good crossovers and are well voiced, but I would use some boost below 50Hz. Can I have the Luxman 😉

[@12voltvids]

@@pliedtka I don't know of the bias varies or just goes full on class a bias at low level

[@joshm264]

I need to get some deoxit for my Sony STR-AV910. I love the thing, and even has a spectrum analyzer!

[@alanarmstrong2323]

Nice chunky control knobs like a Yamaha receiver love it thanx.

[@12voltvids]

This one stacks up nicely to a Yamaha

[@python244]

I had one of these I can confirm the sound out of this amp is amazing

[@12voltvids]

Sure is.

[@davidtillwach5542]

Thats a very nice amp I see it has a built in step up mc transformer for moving coil cartridge .

[@tee-jaythestereo-bargainph2120]

I remb when these came out ! I always wanted one !

[@12voltvids]

So did I, and now I have one. Listening to the beatles live at the hollywood bowl right now.

[@angelodagnolo984]

I had one of those, back in the day, I used to bring my parents house to its knees lol It was paired with a pair of Celestion ditton 66's and a Ariston RD80 TT and Aiwa adf6600 cassette deck. I wish I still had that system.

[@adnanbinahmad]

Top of my wanted list! Kinda hard to get where I am however I have the SU-V7, SU-V6 and my daily driver, the SU-A900 MK2.

[@WApnj]

wow. that's a beauty. I've never seen that model before.

[@12voltvids]

I like this amplifier. It is now my studio monitor. It has such good sound, probably one of the best sounding amplifiers that I own that don't use vacuum tubes. Another one is my luxman LV 103. I got this one for free. Just had to clean the input switch. The guy that owned it thought he cleaned the switch and it was still noisy so he gave it away. He cleaned the switch all right the switch for the panel lights the switch for the audio are the ones at the back that have to pushrod cables connected to them.

[@SDAune]

Great video, very helpful. I bought almost the same amp a couple weeks back for $20 and the one channel cuts out when you touch the selector. I guess I will get my deoxit out and give it a go this weekend. I probably never would have spotted those switches in the back. Thank you!

[@12voltvids]

The guy that gave it to me tries cleaning the switches at the front. These are for the lights. The real ones around the back.

[@SDAune]

@@12voltvids I used the deoxit on the switches like you did and it worked perfectly. The amp sounds great now and there is no crackle or cutting out. I have another similar amp that has the same problem so I am going to pull it apart next.

[@j.t.cooper2963]

👍🏻😎 I have a Technics SA-1010 that has the same rated output 125 WPC @ 8 Ohms it also has that huge power supply and it's 600 watts at the plug. Mine has selectable voltage on the back so I suspect it was a non-U.S. model because the ones that they sold here in the States didn't have the selectable voltage. It is a beast and is underrated by a good amount. I'm pretty sure it will do 150-160 WPC easy. It's in perfect condition and still works fine as far as I can tell. It's the pride of my collection too.

[@int53185]

I have an old 90's Technics receiver with only 35 watts per channel but the sound is very clean and the power output is more than sufficient to drive my Bose speakers to deafening levels. The only thing I have done to it is to clean the speaker select switches.

[@craigstaggs8597]

Bose ..... Ok.

[@souldoc123]

i have HK pm645,and it blows away a lot of new amps...have su v9 too :)

[@truebras]

So, I pulled out my SU V9 from 10 years in storage. I didn’t test if there was any sound cut out / static sound. However, I decided to De Oxit as show in the video. Very easy to access all switches and potentiometers, with exception of the balance one that has no easy access because it sits in the middle of transformer chassis. So, after everything is put back together, I connected a pair of Bose bookshelf speakers and Nad CD player. Oh boy, I forgot how good of the sounds this integrated amplifier makes. I can hear much of sound details even at low volume. Someone mentioned at comments here that the sound is dull. I actually think is quite warm even when bypassing the pre amp controls. Using pre amp controls are actually quite discrete and by personal choice, I like this way. I just put an order for a pair of Klipsch RP 600M. I think this will be a good set up.

[@12voltvids]

This is one of if not the finest integrated amplifier that Technics made. The distortion is at the limits of measurements 0.003%. I use mine in the edit suite.

[@EastAngliaUK]

cool I have to turn the bass up on my epos or kef 10 inch subs if need more bass hear. though these are more than loud enough for me

[@rea8755]

Good evening. I could watch all your videos. I believe I will start this week. I have a Harman Kardon 570i. And I am trying to figure out the pulley/cord direction/wrapping for the changing the am/fm.

[@TonesElectronics]

I’m also working on a 570i that could be my first video as well. I will try and get some shots of the cord set up, as my fault seems to be in one channel of the preamp so far.

[@spannerm8335]

Great video! would love to see a recap done on one of these.

[@12voltvids]

Doesn't need it. Recapping is over rated. This is a DC or direct coupled amp. Caps are in the power supply and tone boards. Not many elsewhere. Turn the tone off and most are not even being used. Seriously recapping is over rated.

[@janchristensen9858]

@@12voltvids yes it's a new in today to make recape. Only do this if its is Necessary to recap the unit totally. Like a amp that's run very hot and has done this for many years then a recap maybe is a good idea

[@scrunts666]

Those are so easy to fix when it comes to those sliding switches :D

[@xtra1car]

I use DeOxit mostly, and it can be very effective. I have had quite a few instances lately with switches in older equipment where I have to remove the switch and take it apart to really clean it. Have you run into that?

[@truebras]

I just pull out my Technics integrated amplifier this week which has been stored for 10 years. I didn’t remember the model, it turned out to be a SU V9 in black. I will be testing and cleaning the rotary switches and potentiometers. I have a question, what should I use to clean the DIN jack plugs in the back that doesn’t harm the gold plated surfaces? I also got a Technics ST S6 digital turner that went dead during the time that has been stored. That will be more of work to fix.

[@williamlogan4049]

No doubt about it Excellent Machine, I almost envy you and your Expertise oh and your good friends who give you such a machine.Keep up the good work and thank you

[@12voltvids]

Known Blake since jr high school. We worked in the same shop for 20 years. He was sales manager I was service manager. I fix his stuff and he tosses me a bone from time to time 😁

[@Petronix777]

Superbe ! I'm restoring a SU-V7 , especially the "New Class" light is out of order and the "rec selector" is broken in the transmision sleve. :-) Any link or info is greatly appreciated.. Greetings .

[@davidmoss9679]

Had one of those stationed in germany when i was younger sold it cheap didnt know what i had ah well

[@lawrencecavens5760]

Hey there, that music I reconise it's the sound track to Joyce Meyer ministries. Going way back to the 1990's when she was staring her ministry

[@12voltvids]

It is musicbakery but they could have used it.

[@machannel8746]

IIRC the DC offset is controlled by an IC. If you measure it you'll be surprised at how low it is, it gets to or very close to 1mv! Also, the New Class A light normally lights up.

[@12voltvids]

Incandescent bulb is blown.

[@fernandobalta1530]

Its possible to get the replacement of those switchs? i have a technics su-v5 and unafortunately the wire cable remote that move the position of switch.. exist spare parts or a way to fix it?..

[@705johnnyboy]

nice piece of kit dude ,and im not a technics fan ,pity they stopped making good gear but recently there trying again...

[@tenmillionvolts]

I'm envious. Wonderful amps. After years of servicing them and many other brands including big name supposed audiofile models, the Technics new class A and class AA were some of the only amplifiers where I could truely tell the difference straight away. Very clean and tiny background notes coming through well. I'm still looking to find one of my own. I'll have to pay silly money for one of the great models now but I'll grab one when the time comes.

[@mikwhiting938]

Hi - I have a Technics SU-X990D Class A amp that has suddenly started cutting out when I play things through it. I have no idea what is causing it - any ideas? Any help would be greatly appreciated - the unit sounds awesome and I miss it! :)

[@pliedtka]

That's one from the days when Technics made really good equipment, sort of the Golden Days of Japanese audio. Nice big Sankens. Yeah, from time to time I come across service manuals that are, like you described - very important info missing, or covered so people can't read it, f...rs.

[@123clis321]

Technics didn't use Sankens at this level. They used proprietary outputs which were matched mosfets. Fisher and Sanyo, later Marantz used Sankens almost exclusively.

[@MacPhantom]

Joe W The Technics SU-V9 uses Sanken transistors, like the SE-A3MK2 and others.

[@kec1012]

I have su-8 but the belt on input selector and other one are broken,can someone help how can i fix that ,cant find spare parts?! Please help!

[@Manny2211]

Wow this amp looks a lot like the awesome kenwood KA 1000

[@mathuetax]

I always liked my Technics equipment, got some peculiar hate over that for some reason. Never understood how Matsushita Electric managed to mess up the brand in the 2000's

[@serviselektrotobelo]

wow very good video.I am tuser from indonesia

[@weerobot]

Quality...to the Max Amp...

[@paulduran869]

Hi 12Volts, I bought my very own Technics SU V9 Power Amplifier about a year ago and it has been amazing until about a week ago when I was sitting down listening to a record and the amp went into protection mode. I always have the volume at about 2 and it was the same now. Can you tell me what the possible causes could be? Thanks for have this channel.

[@deangale4496]

Yes please

[@malteehlers9784]

thanks for this. Just found a pretty good deal on this. What's the music?

[@ricfair9919]

Sounds like a winner, sometimes it pays to be a repair tech!

[@12voltvids]

Winner winner chicken dinner!

[@MacPhantom]

That "New Class A" logo in the bottom right behind the glass door is indeed supposed to light up. The black V9 have it illuminated in amber, the silver ones either in amber or green.

[@12voltvids]

The incandescent bulb is blown. Not critical i haven't replaced it.

[@souldoc123]

@@12voltvids not critical,but..you know that its broken...:)))

[@raymond9839]

Yes it has 2 small flat bulbs, if one burns the other is also out. Replaced mine I believe it was a 8-9 volt. Some replace it entirely with a LED.

[@123clis321]

It's a good feeling to hear the outputs are good from jump. They're impossible to find oem. Chi-com transistors are copies! But if you think that Japanese amp is built well, you've never worked on a Sherwood HP2000 HP 1000 or Quad 303, 405, 33, 34, 46, 606, 306. They practically fix themselves.

[@12voltvids]

I have worked on quad and Sherwood and I assure you they do NOT fix themself.

[@nathaningalls9751]

Great video! I have this amplifier and sometimes the right side will cut out and I have to tap the unit to get it to come back. Any suggestions?

[@79kcirtap]

I have the exact problem same side on this amp. Did you figure it out?

[@davidpinfold852]

I think this must have been the top of the range integrated amp in its day. I have what I think what may have been its descendant - the SU-A900 MK2. Good match for the RS-M275X cassette deck. Does anyone know what the difference between New Class A & Class AA (which my one Is) ?

[@pliedtka]

Every person that owns the RS-M275 deck speaks of it very highly, is it really that good? Maybe you can find service manual at hi-fi engine.com. A lot of people publish them there and there is usually some short description about given piece of equipment.

[@dedr4m]

The AllDatasheet site requires you to follow the download-PDF link (Free), The reason for the blurring is because they use a terrible algorithm for auto-generating the preview. Others probably stated the same. However, trying to get datasheets on most things from the last few years is near impossible, especially schematics and board-views.

[@12voltvids]

I do not install "free" readers or any other add on apps to view something. If a clear pdf is not available I move on. The reason for this is because spyware and viruses lurk in these free reader or helper applications. I have enough pop ups from google, which I allow because I am a partner and I make money when ads run on my videos and I feel it is fair to allow others to make money if I watch their content. So for that reason I do not block Google's ads, but I won't install and 3re party helper apps and I also don't but into the so called ad blockers. I did many many years ago. I paid for a commercial spyware and ad blocker and felt pretty good that I was safe from spyware as i was using a commercial, not ad supported free version. Then i got a physical letter in the mail from the federal trade commission informing me that the company I had dealt with had been ordered shut down by the FTC for all kinds of fraud and illegal activity. While their software was telling you that the sky was blue and grass green and everything was rosy on the computer they were infact data mining all kinds of info, masquerading as the good guys. (Read up on spy killer). So excuse me if I don't trust anyone or anything in the cyber world. Once bitten.....

[@dedr4m]

@@12voltvids IDK how on earth going to alldatasheets dot com and downloading a PDF from there (like a lot of people... probably also Louis Rossmann too) causes viruses and "ultra-extreme-pro-edition"-ware to magically install.... but then again, I only use my blandroid phone as a dumb-phone, don't use a FRiPhone and use Debian Wheezy distro patched up to the hilts with libraries cross-compiled on one distro and made to work with this one on a Lenovo T400... and yes, I do security patches by manual checking of CVE advisories... there's probably tonnes of holes and not yet have I got a virus... also even though I made no mention to adblockers... I may as well mention now the topic is up... I use Adblock Latitude only when logged in and disabled for most sites of my liking when logged out... else google's youtube has a habit of putting up some confusing advert choices that are meant to be relevant to I but not being relevant at all... Like how does lipstick help a guy like myself solder? Maybe advertise soldering stations instead google? Also the adblocker Latitude one I managed to bodge into working on my Palemoon web browser (Firefox clone... because failfox is one way to sometimes get spied on... they've been caught out a few times... so ya know)... the adblocker doesn't force up adverts... though cant block all adverts (The ones that use less common scripting... I can use NoScript for that instead if I have to).... Also I'm aware of the possibility the adblocker may try to filtrate data out... since Wireshark shows no odd activity loading google.com with adblock latitude on vs off... it seems clean... Then again, if I need actual anonymity, I'd use the tor browser and hitch off a random hotspot (We have BT-WiFi hotspots here and many people openly share their logins with friends they trust, sometimes going a bit further a field. Then there's generic hotspotting, even though I'm aware of MITM attacks, they're a little difficult when the hotspot has to circumvent app-to-server encryption.)

[@nickbenke3306]

Grrr! Service manuals!! I was given a DJ Controller with a faulty Headphone channel. I found the schematics and spent days pulling my hair out while trying to signal trace; one of the boards turned out to be a different revision and All the parts were numbered differently! I finally traced the faulty chip using ID numbers!!! That amp though!! It's a Beautiful piece of engineering! Thanks for such eye candy and well done on the quick prognosis! :-)

[@nickfrench7372]

When u tilted the amp to look at the power consumption specifications on the back,,,I noticed what looks like a ic on the back of the heatsink fins.

[@12voltvids]

Nope. 4 big transistors I am sure there is an ic for the computer drive class a biasing.

[@nickfrench7372]

Ok,,,must b big round transistor types,,on that heatsink.

[@ElectoneGuy]

Damn I hate those twist-type speaker connectors!

[@Kowinaida]

What's the '80s TV drama theme' music (the one with the piano)?!

[@johnb5519]

That was a nice score, and it was fixed just by spraying deoxit into the switches. Now you can blow the roof off the house with it.

[@12voltvids]

Blow the windows out.

[@12voltvids]

Got the tuner coming for it and I already have the matching cassette deck.

[@johnb5519]

@@12voltvids Nice, your going to have to show us how it sounds.

[@Sans_Solo_]

Best sounding vintage integrated amp I've had the pleasure to own was a Luxman L-11.....hands down :)

[@12voltvids]

My lv103 sounds great.

[@Sans_Solo_]

@@12voltvids Am well aware of near Alpine takeover Luxman products LV103/107....but the Laboratory series is something very special. Very very rare to find.....but if you do, super well worth it!

[@12voltvids]

@@Sans_Solo_ but you see I would never spend the kind of money that people ask for these things. I didn't become a millionaire by blowing my cash on audio components. I get stuff for very little cost or for free and my system at home sounds very good indeed.

[@kurtzembower9297]

The class a light do light up my brother had this reciver he bought it I'm Germany when he was in the army back in 1982

[@12voltvids]

Not when the bulb is burned out is doesn't.

[@Tysman909]

I have an old Harman Kardon tube amp in very good condition theres an issue with a Hum when my hand is near a certain area towards front if I touch metal Hum goes away. It's near a tube I tried switching tubes but same issue in same area. I need some help diagnosing the cause

[@souldoc123]

there is a bad soldering on board..

[@saqibsami7967]

4:22 what do you call these speaker connectors? Like some are banana plugs, spring loaded connectors

[@craigstaggs8597]

Twist locks.... Great until you try to use any decent cable.....

[@retrogamer33]

I have a Technics SU-X301 amp, it's bloody loud.

[@shaniabalmores4884]

gud pm sir.....my ampli technics su v9 ....the problem is.....the speaker relay do not work or function....although my unit have a power.....so that......it has no sound or audio..... what is the posible trouble sir....thanks alot sir....god bless and more power to your channel all switches and controls are working......ive already check the mainbord the parts one by one... d they are all good.....this made me crazy haha.....ive tested one zinner diode its bad...so i replaced it....but still the relay donot works....thank you so much sir

[@eulinpetit-woodyear6816]

Yes, the "New Class A" supposed to light up.

[@tacofortgens3471]

Later came with the su-95 which did 110wpc in 8 ohms

[@12voltvids]

Your point. The suv9 is 120wpc into 8 ohms with no more than 0.003% thd. It's one of the best sounding amplifiers I have ever heard.

[@seanbennett6008]

I remember hearing Panasonic, Pioneer and Techincs are all Panasonic brands. Ah interesting sounds like it wants to work. By the way I still have a slightly faulty Denon CD Recorder I think I’ve figured out how to fix the CD Recorder drive as it’s currently stuck. As I tried it in my Marantz CD Recorder but failed as I found it was too big, so I bought one from Instrumental Parts in the US. As I live in the UK but could get one from here. Anyway I fixed my portable one and it’s fully functional now. The problem with the Denon was I couldn’t find the switch and having looked at videos I thought ah maybe it’s there!! So I will try again soon then re eBay sell it. It’s perfect apart from slightly dented as I reckon someone accidentally dropped it probably.

[@12voltvids]

Well technics was definitely a Panasonic brand. They had some real high end stuff. I now have the set. I am getting the tuner that matches this unit, and I have the rsm275 direct drive cassette deck that matches it and the slm1 turntable that also matches. I don't know that pioneer was involved with panasonuc.

[@pliedtka]

@@12voltvids Dave you have to tell me, I'm very serious - what is it about this RS-M275 deck that every one likes so much. I never have a chance to hear one. But if my belt driven Nak will misbehave after I change the capstan motor and belt, I might be looking for serious DD 3header (no Permaloy heads). The best Technics deck I heard was top of the line 965 (or something like that) with Amorphous heads sold in Europe (Germany). I was teenager back then. Very nice machine with DD and bias, tape sensivity level adj. with test tone generator. Damn expensive, same price as top AKAI, Aiwa, Sony, TEAC, JVC, etc.

[@oooeurorosi]

Спасибо за хороший обзор Technics SU V9!

[@young_of_the_mill9560]

What do you think about the SU-V8X?

[@THEtechknight]

I have the SU-V4 version, but sadly they decided to use one of those screwball STKs, and guess whats bad!

[@12voltvids]

Soon to kaboom

[@BoB4jjjjs]

Technics make some good equipment. Always liked their stuff, mostly had the edge in sound.

[@djshumon]

Join technics worldwide group facebook.

[@sonnylou8087]

This must be amplifier week, I have a kenwood KT5500 that I have had for about a year, and it powers on and the speaker relay protect seems to be working, but there is no out put, I checked for voltage at the output transistors and there is power there but no audio, at least I have a service manual for it, but doesn’t mean I’m going to get it working, I guess that’s going to be my next winter project, that’s what I get for buying something like this off of EBay, you talk about undisclosed items, but of course I new I was takeing a big chance buying from EBay , but if your in the market for a certain amplifier or other piece of equipment, and you just can’t find it any were, that’s the way it go’s. From what it looks like no one has ever disturbed anything, other than it’s obvious that they’ve had the cover off of it because one of the speaker terminals was striped out, what an idiot who ever did that, I think they were going to try to fix it and they were not successful, well that’s about the end of my amplifier episode for this week, maybe I will get it going and maybe I won’t, time will tell.

[@EargasmicAudioShackInternal]

I have a question since I own one, is it possible to modify the twist lock for the speaker out to a banana plug socket?

[@12voltvids]

I'm sure they can be changed but i never considered it because these ones tie down my heavy speaker wire completely.

[@EargasmicAudioShackInternal]

@@12voltvids Understood Sir, Thanks!

[@64bakes]

I do love these early eighties Technics amps. However, my first "serious" amp was an SU-V5 my dad gave to me many moons ago. I used to love Technics as a youngster so I bought an SLPG 590 and ST GT 350 to go with it as my first proper system. Anyway at the time I found a cheap Trio Kenwood KA 3700 and hooked that up to compare with the Technics. The Trio sounded so much sweeter, and made the V5 sound terribly dull. I'm not sure if this was the typical Technics sound signature for gear of this era? Anyway I didn't gel with it. I don't think the V5 was cheap in it's day either!

[@richardcrook2112]

Good info, thanks.

[@jimle22]

Hey go easy on us old people you're getting there. Just a matter of time my friend.

[@mrkattm]

I had that model, had a borken glass door but still worked, I sold it about 10 years ago in a yard sale for like 50.00 us dollars, how stupid of me, I just checked ebay and they are going for around $500.00, I loved that amp :o(

[@12voltvids]

Try 800usd. Just looked one up!

[@souldoc123]

all we do some stupid things..:)) you are not the only one..

[@cgavin1]

My amp! :) Still the only thing I have that will really drive my 70's Wharfedale Crossover speakers. At what point do you think those big PSU caps will need to be changed? I have seen 70's caps that have REALLY gone bad. Are the 80's ones any less squishy? PS: Yes the Class A logo is supposed to light up. But since its literally a BULB in there, its always loooong since blown.

[@12voltvids]

Yes the bulb is blown.

[@williammelton2037]

@@12voltvids like you video on this amp. I just obtained a Su v707, I have cleaned all slider pots and switches. Still no sound on mains or remotes. Headphones has some sound but very very little. Any pointers I would appreciate greatly.

[@roverwaters3875]

all those switches and preamp controls compromise so much the final output signal

[@12voltvids]

One button, the DC button bypasses all the unnecessary controls. You have your input select and volume control that's it. Even the balance is bypassed.

[@IncognitoChild]

Hi Dave, I have just picked up one of these lovely amps myself. I have heard that this amp has quite high power consumption and that it has a large in'- rush current on power up. Do you know if it is normal for the mains switch to pop a little bit when you switch it on, or is it more a case of cleaning a dirty switch? This is a great informative video, by the way👍🙂

[@12voltvids]

There will be inrush at power up and yes it is relatively high in power consumption as it is a heavy biased amplifier. It's a push pull class a that switches to ab at higher power levels. At power levels under 9 watts it operates lime a single end. Both transistors are conducting throughout the entire waveform so even at no output there is a fair bit of heat produced this power consumed.

[@IncognitoChild]

@12voltvids so just to confirm: do you think I need to clean the power switch if it's popping (arcing) a little bit when pressed👍

[@12voltvids]

@@IncognitoChild cleaning probably won't do anything. Might need replacing at some point.

[@nickfrench7372]

Looks like there,s an ic on the back of that heatsink too.

[@12voltvids]

Big transistors.

[@ntag411]

That's not a power amp, it's an integrated amp. Fairly common for solder joints and switches going intermittent. They always used non glass epoxy boards except with some of the higher-end stuff. My Stax SRM mark II headphone amp is well build and uses glass epoxy. A more expensive Stax headphone amp, that I returned, did not. My Nakamichi CR1 (I think) dual capstan 3head cassette deck, pricey, no glass epoxy. Stax and Nakamichi are now owned by the Chinese.

[@gteaz]

I've got a V5 V303 two V505 and next week buying a V9. I do want the V909 though, but four thousand pounds isn't worth it for a V909 compared to the V9 for £350.

[@12voltvids]

Considering they are so close in spec. The 909 having a slightly better SNR and slightly better DF. I myself wouldn't pay 50o for one either as there are many around for free like i got mine.

[@tonybalm1513]

Try the new WD40 Switch Cleaner. It's a fraction of the price the cans are bigger. I used to use Deoxit I found it overpriced. I have had very good results with the WD40 Switch Cleaner.

[@12voltvids]

Yes deoxit is expensive. I reserve it for my stuff.

[@souldoc123]

@@12voltvids i tried PRF 7-78 220ml Taerosol,good one...

[@goboslament5535]

I love this amp. If anyone has got a black su-v9 and wants to trade for a silver one, give me a reply. Mine has been my daily driver for 6 years but I've always wanted the black one. I'll even make an offer on a non-working one if the exterior is in good shape so I can swap the guts.

[@whodatdere1]

I usually go through alltransistors.com for most of my amp transistor references and cross. Otherwise I'll go through alldatasheet.com for the rest. They usually are pretty good at linking to most sites or have their own PDF online to view without pay.

[@young_of_the_mill9560]

What’s taped on your screwdriver?

[@12voltvids]

Magnet, to make the bit magnetic.

[@aurthorthing7403]

It's gotta have some opamps.... everything has opamps.

[@2009numan]

isn't the actual speakers that make the sound

[@int53185]

It's not worthless. These go for over $500 us on fleabay.

[@12voltvids]

Try 700. It is now my studio amp.

[@int53185]

Canadian