I used to work for NEC Australia. It was a fun company to work for, good times.

@rbwannasee

2 жыл бұрын

I worked for NEC in Hillsboro, Oregon. Then it became NatSteel, then Solectron, then they outsourced everything to China, then laid off everybody, then closed.

Rockin' out! Nice amplifier is right. Great job on the meter fix!

Nice amp! I am currently restoring a NAD 7240 and referring to your videos, Dave, which you did last year on that model. I received it with all of the output transistors removed on both channels so I am testing the surrounding driver circuits for problems before deciding if I will get new outputs.

I still use my NEC Authentic series turntable i bought in the late 70's . AUP 7000 FE. Its a great turntable !

Agree 100% NEC made rock solid equipment had an early 90"s IA sounded great

that's a slick amplifier for sure. I'm an 80's kid that had a Pioneer SX-727 growing up and I miss the smell of the wooden chassis cover when it was warm

NEC is big into PBX switches, Microwave radio, light wave MUX, etc. so it is not surprising the can produce a quality audio product. Wouldn’t mind running into one of these.

Oh HECK yeah!!!! Gotta story I just gotta share about a nice NEC product I "found" YEARS ago----a 25" monitor and the tag on the front says c25-900a. I'll keep it short. So back in the day I worked for my local parking outfit downtown which covered three large parking ramps and several lots. Doing my daily morning drive through of one of the ramps I came across a large gray box somebody dumped off. Upon further inspection it was an NEC 25" tube color monitor set. Loaded it up and brought it down to the shop. Only thing it was missing was it's computer style power cord. Right then and there I decided to bring it home. Found the tube needed to be degaussed and some of the controls cleaned and that was it. This was back in roughly 1995-ish and I'm STILL using it to this day :)

I always preferred NEC to Sony in the late 1980's. NEC delivered what Sony only promised.

@eaglewi

2 жыл бұрын

I am totally happy with my nikko

A couple of years ago I bought a turntable that was bundled with an amp and speakers. I was after the turntable (Technics SL-Q303 in black) and the amp was an NEC V111E of the 'Authentic Series' . It is a combined receiver/cassette player rated at only 20 watts rms per channel. The speakers were in need of repair so I didn't bother with them and connected the NEC to a spare pair of 100 watt speakers. WOW!!! I couldn't believe the strength of the output and a very pleasing sound. A very good second system that I use most often.

@wyldanimal2

2 жыл бұрын

When the Title states "Under Rated" it doesn't mean the Power of the Amps were under rated. More it means "Not Recognized" or "Over looked" But your remarks about loudness just shows that Power and Loudness aren't equal. The dB scale of loudness is Logarithmic, so the loudness difference between 20w and 100w isn't 5 times louder, probably just 1.5 times. 20w = 43 dBm and 100w = 50 dBm But Pushing a 20w amplifier to it's 20w max will have more distortion than pushing a 100w amplifier to the same 20w output. This is the main reason you use a higher Power Amplifier. at Louder Listening Volumes, you don't have to Push it in to it's distortion range. or so, that is what has been explained to me..

Thanks for sharing. Very insightful. And from you makes it that much more.... better. 👍

So this NEC amp sounds pretty incredible. It seems like it really is/was a hidden gem. I probably would have gotten this to build my first stereo system when I was young.

@12voltvids

2 жыл бұрын

Owner of it loves the sound. Says it sound better than some of his other vintage Amps.

I own the NEC AUA8000E and I consider it one of my best vintage discovery. Built like a tank, it sounds powerful and neutral but never loses details.

@gwernette5971

2 жыл бұрын

The term neutral is different to everyone's ears but I always thought that the Yamaha series was a very neutral sounding amplifier

It made me feel really good when I said “looks like 2 mono blocks” just a moment before I heard you say the same thing!! I’ve really put time in on learning about electronics over what seems a week but has truly been ten + years. I think today I’ve got much more of the theory under my belt than practice and repairs. But just understanding that theory, and speaking the language of electronics is one of the most rewarding parts of my life. The people who are fluent speakers are some of the brightest and greatest most valuable assets relationships wise. At least it has been this way for me. Damn!?! That crazy transducer contraption in that meter would be fun to try and rig up to a spring reverb unit, I might guess?!! Hey, THANKS for sharing about this!!

How's this for a goody, I have a Harman Kardon CITATION TWELVE power amp in working condition. It was my uncles who had it for many years. In the early 70's I would ride my bicycle 12 miles to the other side of town to a home stereo shop named Modern Sound. The guys there would let "play" with the equipment that was on display. They had all the good stuff, notably the JBL Paragon, Linear power amp (model number excapes me but it was BIG!) various other book shelf speakers and intergrated stereos. What caught my eye was the Dynaco line of stereos, very affordable in kit form. Over the next two years I got the PAT 4 preamp, ST120 power amp and the FM5 tuner as Christmas and birthday gifts. When I got the PAT 4 preamp my parents didn't see me for three days, it took me that long to assemble it and it was fun! This was when I got really good at soldering. I still have this equipment as well. I also got a Acoustic Research fully manual turntable with a Shure M91ED cartridge from the same place. The 70's was a great era to grow up!

I have this amp and matching tuner. All the meters were stuck. Its probably the only weakpoint. The amp had no relais cover when i bought it! Love your video's .

@12voltvids

2 жыл бұрын

I did a tuner with a stuck meter too.

Wow does that remind me of my workbench when I was doing electronic repair. Covered with junk and just barely enough space for the product! Memories! :)

when u took the cover off that baby i said woohoo what monster!! nice i heard that nec made stereo gear for a few companies way back in the 80s i had an all in one stereo made by them rebranded curtis mathes very good sounding it fooled me ! the hi fi world and stereo nuts went to sleep on nec hifi i couldn't believe the specs on thier cassette decks crazy amazing nice to see this one again .

@12voltvids

2 жыл бұрын

Yes very good and built like a tank. They are available for very little money because so many don't know what they have.

don't expect that in all the Authentic Series amps. really sweet thanks for sharing. love dual mono blocs.

@12voltvids

2 жыл бұрын

As i said, under rated. People saw the name and passed. It was a solid design.

@AvidRetro

2 жыл бұрын

@@12voltvids Hi 12voltvids. I really enjoy your videos you have so much learned knowledge. I have a broken power supply in my Sharp Optonica SA 5101. It made a noise and blew some smoke through the headphone socket. I think a rifa capacitor failed situated by a couple of fuses but not sure what to replace with.

Close to my Rotel RA-1412, also not a "popular" brand but a fantastic amp. I bought it in 1977 in Japan when I was stationed there in the Air Force. It is also two mono amps in one. Except it has all the inputs on the right side, the speaker outputs on the left side, and the power transistors all the way across the back. Extreme heavy due to the two massive power transformers and caps. And it was rated at 110 watts per channel... but at 0.001% distortion!!!

NEC back in the 1980's, made very high quality and reliable commercial analogue telecommunications equipment.

@12voltvids

2 жыл бұрын

They made many tv transmitters too.

I recall NEC made televisions too Nice unit, quality build

@12voltvids

2 жыл бұрын

I serviced and nec plasma a few years ago.

I have a NEC HIFI system - AUTHENTIC series (bought it back in late 1988? ) Amplifier is NEC A730E with 2x70RMS - Inside it there is a TOROIDAL transformer (supposed to be better - lower noise) I am still using it! Combined with KEF C40 speakers its great!

Wow, you weren't kidding. That is definitely a wolf in sheep's clothing. I guess I'll be looking for this wolf on E-Bay now.

@12voltvids

2 жыл бұрын

Very under rated and very worth while seeking these ones out because they go cheap.

I had a NEC VCR that was unbelievable for it's time. Still have the TV from around 85 and it works perfectly. I use it about everyday and I have never fixed a thing on it.

NEC made incredible quality in many of their products. Also Hitachi, Nikko and Mitsubishi.

Nice piece! I always look for Nec equipment but only have found a handful of pieces in the last 14 years of collecting.

Back in its day, NEC audio equipment was much more expensive than the run of the mill Technics, Pioneer, etc. but was extremely reliable and sounded great. The problem was NEC didn't have the "brand" recognition and the profit margin wasn't there, and stores wouldn't haggle with customers on the price as they would with other brands. Plus, as you pointed out, customers wanted higher power.

My MCS version also has stuck meters both being pegged out at the 65 w mark.....thank you for the meter repair tutorial!

Nec built some good stuff ! I bought My Mom a NEC cell phone yrs ago & It was a very well built one & worked really well !

Sounds pretty good to me and 65watts per channel is plenty enough for most speakers.

I stumbelled over one when I was exploring a neighbour fleemarket, 100 Norweigian crowns!The owner asked if the price was too high, I gave him 200 crowns and clapped his shoulder!I had one of those in about 1980 or so and it was great.A friend of mine was more than average utdatert on Hi Fi electronics, he insisted this was great stuff.It was stolen in a house robbery,the thieves grabbed what they thought was quality.Yes,you are right,in Norway people believed it was worse than Phillips at their worst!Nic is not a very flashy name,right?

Even by today's standards , it's a great amplifier with a looks to match .

Very interesting, I've never seen anything from NEC for audio, don't think it ever came to the UK. I wonder if they used their own transistors in the PA section. As NEC were a big player in transistors and mosfets.

I've tried to repair and flip gear but by the time I'm finished I've become so emotionally attached I can't let it go . . .

I just got a NEC A820E amplifier. 80w/channel. Love the sound! Wasn’t expecting much for $30 with a cassette, turntable and tuner.

This is awesome design! My Musical Fidelity A3 integrated amplifier has dual mono configuration with two separate toroïdal transformers and i don't want to sell it. 85 Watts per channel for 8 Ohms load and 170 Watts on 4. Keeper for sure! "Everybody like's to see meter's bouncing" Hell yeah. It's hypnotizing.

@GS-HIFI-AUDIO

2 жыл бұрын

Yes hang on to it! It has extremely low distortion (0.008%) for an amp rated at 85w/8Ω. The best audio equipment came from the 80s and 90s.

@GS-HIFI-AUDIO

2 жыл бұрын

@@rc6717 Posting a ridiculous, subjective comment like that I can easily infer you are the one with significant mental impairment. I recommend you abstain from eating anymore paint chips. Now, when it comes down to performance specs of audio equipment, the best numbers will be found on amps, preamps, integrated, receivers, etc built circa 1980 to 1999. We can all agree lower distortion, lower noise floor, higher damping, and greater power output is desirable. Let's take the very top tier "mid-fi" amplifier (Almost hi-fi @ $799) the PM6007 by Marantz currently in production. THD 20Hz-20kHz 8ohm both channels: 0.08%, RMS Power output 8ohms: 45W, Damping factor: 100, SNR: 102dB. Nothing impressive. Now let's take the well known Yamaha M-85 for example made from 1986-1988. THD 20Hz-20kHz 8ohm both channels: 0.002%, RMS Power output 8ohms: 260W, Damping factor: 230, SNR: 122dB. Nice. Bottom line, today's equipment is still outperformed by the older gear. When the demand for feature rich AV receivers started around 1999, companies started cramming in Bluetooth, wifi, 7+ channels, HDMI, ATMOS, and on and on. The focus was no longer on musical fidelity and now on the number of features it had. I recommend listening to your favorite Raffi songs on freshly serviced Yamaha MX-1, then judge for yourself 🖕🖐️

👍🏾👍🏾Enjoyed this video, you may have answered an old mystery of mine from years ago, I do believe I had the black J.C. Penney MCS version of the old black NEC tuner that would went with that amp

Brilliant. Who woulda thunk. Very well done. Thank you! You have a new subscriber!

In the UK we used to aspire to the Quad 405 current dumping AMP -- trouble was you had to buy the whole Quad ensemble to use them, this amp does look nice for normal household use and after all tnhere are many amps that punch above their stated weight on paper.

I don't know about " underrated " but the Carver M1 magnetic field amp was mind blowing . massive power and very clear. I had one back in the 80s that drove the original polk SDA 1 speakers . the speakers could handle 500 watts a channel and i think the amp put out that much also . Still my all time favorite amp and speakers to this day.

I work at a TV station that back in the analog days, had an NEC transmitter. On the EEV blog, you saw Dave do a teardown of an NEC "exciter" that would have been similar to ours. They also tried to make professional videotape machine with little success.

We had an ITT stack system in the eighties which was mostly all NEC Japan OEM, bar the turntable which was a Mitsubishi OEM. The speakers were most likely the only European thing about it, and had Audax drivers with 'real--wood veneer' cabinets. Looking at the behemoth that is the Modular Component Systems 3275 receiver (an NEC AUR-8075 in disguise), it has some very minor cosmetic similarities that remind me of the ITT receiver originally in our setup..

That Nec fasia just reminds me of my pioneer Sa-706, it's like nec looked at pioneer and copied the basic look. I do like the seperate p.a modules and access :-D I have also loosened the bearing on many meters that got sticky, i think the bearing surfaces corrode. C.b/ham radios also suffered from the same problem.

I think if you look inside other audio equipment from that era, you'll find NEC parts. That speaks volumes about what a trusted name they were.

@12voltvids

2 жыл бұрын

Nec made millions of parts. They were one of the big 3 in Japan. The other 2 being Matsushita and Toshiba.

I'm a tech and never had the pleasure of servicing nec equipment. That unit looks like a beast

@12voltvids

2 жыл бұрын

That's because they never break down.

dual mono could drive 4 ohm loads and back then that meant the amp could produce twice the rated power. The old brochures would have mentioned that, those outputs where probably rated for 25 amps and at least 150 wts. Pioneer used something similar in their amps from the same time period that they call ring emitter transistors that where very durable and you will notice they are attached with 2 screws per which gave the transistor a better contact area for the compound to fill in intern providing better heat dissipation. With a little modification to the heat sinks they will accommodate To3 outputs which are more common . 10 thousand mics is plenty and won't overload the fuses when she powers up from dead most of the amps I have restored her the last 40 years have had caps with similar capacities to this the only time you would see ripple would be at clipping and I'd worry more about the high frequency drivers when driven to clipping as that can ruin them.

I once bought a marantz 2385 in excellent condition for 5 bucks at a garage sale. at another garage sale a lade gave me a excellent fisher 400 sold them together for 500 bucks cash about 15 years ago. the new texas instruments class T amps work so great they sound as good as vacuum tubes. my garage stereo is a RCA MX7 got it for free. In the past great stuff was cheap or free not any more.

I have an nec a10ii amplifier and it has to be one of the best sounding amp I’ve had the pleasure to listen to

Ive got an NEC a10 that sounds very good without any updates to it. Great amps

@Luca-sw8mi

2 жыл бұрын

The NEC A10 is one of the best integrated amp ever built! It's rare and very expensive.

It’s interesting to see some of you guys go to heroic lengths to reclaim older solid state audio gear. Most of the stuff, even the better quality stuff, was never really designed with repair or long-term viability/reliability as an imperative, and it’s only gotten to be more and more difficult with contemporary designs. I’ve nearly completely thrown in the towel with messing with repairing solid state gear, except for very basic repairs on otherwise good condition equipment. Endless online “Easter egg hunts” trying to find and stockpile obsolete semiconductor devices etc, storing stacks of dead donor carcasses to have a source of now near impossible to find NOS replacement parts…. I just hit my limit. Hats off to you guys still fixing the solid state stuff. Personally, I’ve gone straight back to working with tube amplifiers and preamplifiers ONLY, and life has been much easier and more relaxing since then.

@12voltvids

2 жыл бұрын

I hear you. Tubes are so much simpler to work with and they sound a whole lot better then most solid state gear, but they are incredibly inefficient, waste a ton of electricity which is getting expensive and operate at very high voltage which requires utmost attention when servicing as they can kill you in an instant.

I was thinking Nad when I seen but have never seen a NEC amp. It looks live a Sansui integrated amp-very impressive. I remember NEC made a VCR that had alot of guidepost problems.

@chrisristau8803

2 жыл бұрын

I have a small nad power envelope amp that kicks ass !

@audiogear474

2 жыл бұрын

​ @@chrisristau8803I agree. Nad had such high headroom that many of their receivers/amps could keep up with more powerful competition.

@chrisristau8803

2 жыл бұрын

@@audiogear474 it's only rated at like 20 watts per channel ! Id have to say it does a solid 65 watts per channel though if i were to guess. It's a 7220pe .

@BootJamesOut

2 жыл бұрын

@@audiogear474 NAD headroom came from rising up the low end cutoff fz. Instead of the amp playing from 20-20 let's say 50-20 hz when the button was push in. As bass demands power

@markanderson3740

2 жыл бұрын

i had a single cassette player that had the same black front but also had rackmount handles it could be carried by. NEC made beautiful equipment.

great amps. and great video.

They made excellent TVs back in the day

Thank you for giving me confidence in repairing my meters on my fisher RS-2003 by just loosening the screws 👍

Thanks for the video, I enjoyed your commentary.

Great-Video-very-Informative,Thank-You.

Some JC Penny house brand stuff was made by NEC. I had a Modular Component Systems (MCS) 3847, which is the same as a NEC AUA 7000e. I recognized the one you were working on based on the knobs alone :-D

I thoroughly enjoyed watching you, 12voltvids, troubleshoot that NEC analog right channel power meter! Great job indeed...

NEC is one of the manufacturers of best and most expensive projectors, 'til this day. But I did not know they have manufactured any home audio gear. Even today, some of the largest and most expensive LCD TVs are made by NEC.

My father had a NEC cd player back in 1984 bought on a trip to the US. But as you say not too common generally as a brand.

I loved their TV's and VCR's

I caught this because I have a JC Penney MCS 3285 Receiver from 40 years ago. It was great for its time. Unfortunately I let a friend work on it and he messed up the input board and then (says he) lost it. I only recently found out that it was made by NEC for JC Penney.

Yes, the speakers' relay did originally have a clear plastic cover. I used to be a hi-fi dealer, here in the UK in the 1980s, but NEC gear was seldom seen on these shores. Much was due to the snobbishness of the British hi-fi press towards Japanese equipment. When I moved to Italy there were more but still a rare find.

Great Amp. Looks great, and it is great. Professional meter repair.

Looks similar like a old Philips design, which I'm building at this very moment, two real monoblocks with Toroidal transformers, almost the same voltage. I think also specs around 50 or 60watts output. But if I see one on my bench will surely look at it closely.

Could I ask what artist we were listening to? It sounded familiar to these old ears.

@12voltvids

2 жыл бұрын

The composer is Jack waldenmaier and his production company is musicbakery. It's royalty free production music and you have heard it before in TV shows, radio commercials, and other productions.

@act.13.41

2 жыл бұрын

@@12voltvids Thank you sir.

Nice amp I have a nec a10ii and it's a beast of an amp but its only rated at 60 watts per channel

NEC made electronic components as well! I loved them as well as Toshiba and good ol MGA or better known Mitsubishi. Love this stuff! Right away you look at that power supply! That’s right only a 60w supply a channel! The separate transformers and caps! The relay cover was bad speaker wires or to small or load. They forced the protect on to jam! Ya got both channels? Hell yeah! Just esr those caps and replace if anything. Clean her controls up and you got a excellent pice of electronic history! I can get the original mount style but they are subs but better than other subs due to matching the spec of the original components. Huaggo semiconductor in China has allot of them great subs. But on USA soil I’d try east coast transistor for the hard to find stuff!

I have a 600 watt Kenwood amp from the 80's I think with two huge transformers that looks like the same layout inside. I dont know if there are any connections between the two companies but I can testify that the Kenwood I talked a friend out of when it was having some scratchy intermittent pot problems. after fixing it is a freaking monster. I need to save up to buy speakers that can take the juice that old beast pumps out.

i had one a couple of years ago but it was a overeas unit its power was 220 vac but it was the same desighn as this one your working on except i dought it was a dual mono amplifier, it had the same issue right channnel meter was stuck , but yes a great piece in deed

I had a Luxman L-58A - I was second owner, it was all original - which also had no cover on the output relays. A really nicely built amp - seems they can be all original without them.

Enjoyed the VU Meter education. NEC incredibly rare here in the States.

It’s just the jewels in the meters and I’d turn the jewl set screw to the left to break the glue loose. Then tighten it just enough to drag when turning to the right and tighten but just until the meter starts dragging to full scale then loosen it just enough to release it back to zero. And then another 1/4 turn to the left. It loosens the stuck jewl in the meter. A little of the glue dries and a piece breaks off and floats into the bearing. And needs cleaned and tension adjustment needed. That’s all that’s needed time and patience and knowing what to do. It doesn’t take as long! Lol

You mentioned the Hafler series 200. I purchased a pre/power combination when they were new in the 80s (dh110 and the dh220). Although musical it didn't have much Headroom. I ended up having to pair it with an NAD / subwoofer to get what to my ears was full dynamic range

@RobertSmith-tq6mf

2 жыл бұрын

I have the same amp and preamp also. Bought them new. They drove my Magnepan III B.

I had loan of a Sharewood black amp around 1988 and playing Macdonnas Laisa boneta "the sound was magical" and full - a cut above any amp I had before and since.

have the same problems with some cb radio meters,,, i just back off the needle screw a tad

Curious what the harmonic distortion level be? I have a Sansui 6 reciever/ amp I bought in 1974...it still works...the volume potentiometer wiper is worn making for spotty function.

Looks a lot like my old SAE TWO integrated from the late 70’s! A great little 50 wpc amp!

Another sleeper is an Optonica SM 4646. Also a dual monoblock but with a third transformer for the class A preamp stage AKA Delta Power.

I got an NEC ds8000u mk2 at goodwill for 10$ it works great, really cool vcr!

Underrated indeed. The specs for it show 0.1% THD and 95dB SNR, which is what lower end equipment performs at. Those specs don't match the design and quality put into this. They did make other models, like the A-10, that seem more appropriately rated (0.003% THD, 110dB SNR, 5Hz - 300kHz frequency response).

@marvinmartian7281

2 жыл бұрын

Yes! but the damping factor of 30 is no enough.

@GS-HIFI-AUDIO

2 жыл бұрын

@@marvinmartian7281 Higher damping factor numbers don't always translate to "better sound". It's all about the speaker/amp relationship and personal preference. You can boost the damping of the amplifier just by switching to higher impedance speakers if you enjoy a tighter, more controlled bass. Lower impedance for warmer, softer low frequencies.

@marvinmartian7281

2 жыл бұрын

@@GS-HIFI-AUDIO Yes! indeed. My SAE 2400L with(8 ohms) JBL 4411 Studio Monitors is a good example. These kind of vintage speakers like Altec A7 Valencia (846B) or electro voice need big damping factor amplifiers. I like the Phase Linear 700B amp the damping factor is 1000 Perfect for big JBL L200 L300 or 4435.

@marvinmartian7281

2 жыл бұрын

Muscle car amplifiers indeed!

@GS-HIFI-AUDIO

2 жыл бұрын

@@marvinmartian7281 your 4411s must be rare speakers since I could only find one on ebay listed at $1000 buy it now. What kind of material are your drivers made of?

I remember the first transistor radios,a sailor came back from the seven seas and brought with him a small Italian radio,in a neat leather holster,so small people believed it was an Electric shaving machine.

Great piece. For now, I think it would be useful to add "NEC Authentic Series AUA8000" to the name of your video. I own a NEC A10II Amp with a NEC T-6 tuner, but more on that later. I'm an old fan of NEC audio-I also once owned their AV-300E Surround Sound amp.

Nec I have repaired a couple of those back when that unit was not that old .

Hi 12V nice vids sir 👍🏼 Just wondering what your opinion is of Onkyo stuff? They seem pretty well made to me but I’m not a tech. I do have an AV Receiver/Amp TX-SR606 that I just love, it’s huge by today’s standards but the audio output on all channels is clean and pure. Keep on keeping on good sir. 👍🏼

@markpaterson6024

2 жыл бұрын

I just found one of your older vids fixing an Onkyo dsp chip, fingers crossed mine holds out.

Best Television I ever had was an NEC. I bought it in college in 1985 and it finally died in 2004 after nonstop use and being dragged across the country twice.

Just found your channel so far so good subscribed. Do you repair vintage Harmon Cardon

Nice Amp and great build quality. Not to sound critical but from a service perspective observations. (1) Is it possible to calibrate the meters ? The meter on the right Channel seemed to be demonstrating a higher output. I suspect it required matching calibration as it’s unlikely the balance was off or the inputs to the amplifier or the gain were imbalanced. (2) A little screwlock glue should be applied to the pivot screw after adjusting. These screws can vibrate loose and move. Great Video. Love your work.

Yes these were also branded under the MCS brand of electronics sold by JC Pennys....I worked on one these for a friend of mine ( faulty power switch) ....wow one of the cleanest most musical amplifiers I've ever heard! I liked it so much I purchased one cheep in not working condition...future project!

Nicely laid out, easy to work with. My dual mono Sansui is literally crammed together, there's not a centimeter of free space inside. Even inspecting a PCB requires a lengthy stripdown. This NEC is probably rated for far less watts, but so service-friendly.

A lot of good reasonably priced audio gear was made in the late 70s to early 2000s until the consumer electronics trend became driven by smart phones, internet streaming, Bluetooth speakers and making stuff small. The average audio fidelity of the home has gone downwards in the last couple of decades.

The style of the front panel reminds me a lot of an older Sansui AU-20000 amplifier I've got around here somewhere. It is really heavy (170 W x 2 ??), but I believe there is only a single large transformer.

I like the black Technics component systems that came out in the late 80s .. People dont know how good some solid state systems can sound

Great video! Question, what song is being played at the end?

I liked this from seeing the explosive soldering intro.

crown makes make some amps that most people don't know about that are really good at their price point especially the XLS series

What is the advantage of a dual mono design over that of a typical stereo amp? Are there any practical differences between two separate PSUs vs a single larger PSU?

@Satyrgo

2 жыл бұрын

you can have the both PSU working in a better way because they re moving 1 channel each one, less heat, less stress. If you dont know how to work Grounding techniques you may be causing GND Loops, but is a safer way to have a amplifier if i dont understand wrong

I had to go look at my Adcom GFA-535 mk2, it is 60 watts a channel and dual mono. There are 4 x 6,800 mfd 63v caps and two smaller E core transformers that you got there. Also the output devices on the Adcom do not have as much heat dissipation as the ones on this NEC, those have big wings and dual screws, where as the Adcom has a single screw per output device. The AVR series receiver model number, the first two to three digits are the wattage per channel, something like Marantz did. I could not find this one in my 1997 Orion Audio Bluebook, but I bet it is 80 watts per channel more likely.

@milesdufourny4813

2 жыл бұрын

That series of Adcom amps were designed by Nelson Pass.

@zulumax1

2 жыл бұрын

@@milesdufourny4813 Yes they were, love his designs.

My dual monobloc has toroidal tx with dual secondary's. The components are on the same board but it's split down the middle. It was a UK design by Graham Nalty and available as a kit. Sounds great. Seek DM30 from Everyday Electronics. Good luck.

@12voltvids

2 жыл бұрын

That doesn't count. Single transformer. Heavy load on one channel will influence other winding. Dual monoblock has seperate everything.