SPEC-1 - Pioneer Preamplifier One Of The Best Old Vintage Stereo Preamps. Repair Restoration Testing
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- Опубликовано: 8 сен 2024
- A Pioneer SPEC-1 stereo preamplifier repair and restoration video. Known as one of the best old vintage preamps. The power supply, input circuit, mixing amplifier, filter amplifier, and tone amplifier assemblies along with the fuse board in this Pioneer SPEC-1 preamp were completely rebuilt. This Pioneer SPEC-1 was then bench tested. This was a top to bottom repair and restoration that after 40 years of service this vintage amplifier needed. This Pioneer SPEC-1 preamplifier now sounds great and will be reliable for decades to come.
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Развлечения
Back in the 70,s I worked as a consultant in the audio industry in Toronto. At the end of this video you showed shots of a bunch of units. I found myself yelling out the model numbers as they came into view. This is why I am a subscriber and love your descriptions of the units operations. You and I are both vintage units
Hello Sir, I would like to invite you to my home page to look at my speaker, he is developed by me, really want to get your approval
Best wishes
I bought one of these Spec-1 preamps in 1978, along with the Spec-2 amplifier; while stationed on Okinawa in the US Marines. The headphone amp in this Spec-1 is awesome!
Yes, The Spec-1 and Spec-2 are great examples of the quality that was available in stereo products of the 1970's. Thanks for your service!
Ooh, that’s good to know!
Good timing! I am in the process of refurbishing my Spec1, Spec 2 , CT-F1000 and HPM-150's that I bought in 1978. Back then, I was the service tech at a hi-fi store, and all of the major manufacturers offered a 50% discount to employees of their retailers! I bought all of this plus a Pioneer electronic crossover, a Marantz tuner and a Marantz power amp for only $2000. What a deal! Glad I hung on to it all.
Yes, good move keeping everything. You were a tech so you'll breeze though the restorations and that equipment can live on.
I got an even better deal when I bought my stuff broken and then fixed and modified it. I was a repair tech for many audio stores in Pittsburgh.
I like that you're interested in the story of the owners. I hope when I'm gone someone cares that much about my audio equipment.
Thanks. Just tell someone in your family or write it down. It will be passed on.
Same!
Back in the day, HiFi magazines were full of this high quality Japanese HiFi gear when they were new. It's great to see them once again on here, second hand they may be, but this Japanese gear still sounds great to listen to!!
Yes, the old equipment can hold it's own. The issue is the need to restore these 30, 40 and 50 year old units. When they are up to snuff, they can sound excellent.
@@vintageaudioaddict I believe so to much better than things made today for the same price.Thanks.
I’m looking forward to the time when I can afford to fix up my Spec 2 and then service my Spec 1. Covid put a real damper on things so hopefully 2023 will be the year!
i have one working since 76 with the spec-2 it is a very especial pre-amplifeir, when others systems i bought in late 80´s and the 90´s ,i had to conect this because it never failed other than cleaning the tone controls knobs, this when the newer ones failed for a lack of quality matter and have a older receiver that works since 74 in the tv room because of it´s matrix 4 with two extra speakers
The older audio equipment really is very durable. Most of it will outlast us. Thanks for watching.
a master piece the sound is impressive to say the least
I have no formal training in this but I just finished restoring a Spec 1 Preamp. I bought a Capacitor kit off E-bay because I do not have the time and patients to sit down and do all the ordering. It came out perfect, everything on the Spec 1 Works and it sounds great. Thank you.
Thanks for sharing. I'm glad that your restore went well. The SPEC-1 is a wonderful piece of gear.
Sitting through your presentation, was like listening to an old friend. Thank you for sharing your experience and expertise.
Thank You. Glad you enjoyed it!
Looks very similar to my SA-9500 II, but without the amp section obviously. Impressive piece of equipment.
Yes, it is.
Hard to find equipment like that nowadays, Rack systems,Spec one is one of the best for sure!
Yes, the vintage equipment is getting harder to find and it's pretty expensive when you do find it. Thank you as always for watching and commenting.
When I was 15 instead of buying a car I bought a high end Pioneer system. My friends thought I was crazy. But to this day, half a century later, I still remember hearing it for the first time, the music filled the room as if the musicians on the record were in the room...incredible. Been a audiophile ever since...was a musician at the time and 10 years later became a audio engineer. But just the cosmetics of the components in those day were beautiful and exciting to look at. Big VU meters, aluminum panel and knobs and those fantastic feeling switches. I sure miss the look of these.
Thanks for sharing your story. I'm with ya. So much excellent audio equipment was produced in the 60's and 70's. Beautiful to look, sounds good and is reliable.
not only the look but the sound quality,i still am amazed when hearing considered good integrated amplifiers not being as good as mid 70´s material
The mode control is useful for determining if speakers are in phase, and helps with speaker placement to avoid bass node cancellation.
Good answer.
I have all my boxes with all packing materials. I have all my manuals. I have all my original receipts. Which means i have had these items along with the equipment since 1975, talk about a a piece of work. Thanks again.
Wow! Not many totally complete packages out there. Congratulations on still having your gear for all of these years.
the L+r feature and the others were very handy because of the first stereo records ,this if you had a huge room to fetch the sound on the far speaker
Thanks for sharing.
"Mono left," "mono right," etc., were of considerable use to audiophiles who had high-end preamps and integrated amplifiers from the 1960's and 1970's. In particular, you'd use this option for playing LP's.
Many record collectors, particularly fans of classical music, who were a majority of the customers for high-end audio equipment, had a large number of monaural records. And until the early 1970's, a fair number of LP's were issued separately in both monaural and stereo, with the stereo records commanding a premium of $1.00 per LP. A 1970 dollar is worth almost $8 today.
And sound engineering of early stereo classical LP's sounded unconvincing: all too many records were engineered with exaggerated, ping-pongy separation. Listening to some records was like listening to a tennis match. This doesn't bother non-classical listeners, but it drives classical listeners frantic. So having a "mono left + right" option made unlistenable stereo records listenable in monaural.
Another abomination of early stereo was reissuing remastered recordings in pseudo-stereo, where all the high frequencies were shoved into the left channel and the low frequencies were shoved into the right channel. Even today, I listen to such records in monaural mode.
In addition, earlier turntables and cartridges, even high-end ones, were not kind to records, so in mistracking and groove damage to one wall or the other of the groove was common. "Mono left" or "mono right" let you select the better side of the record groove.
Just a little bit of history from when dinosaurs stalked the earth.
I need one of these to pair with my 8500, I'm nearly fifty now, and have built my dream vintage system, my kids will be happy when they inherit all of them
Thanks for sharing. Yes, they will.
Dá prazer em ver 1 Pioneer em nossa frente!!! 1 mais bonito que o outro. Parabéns pela restauração. Em 16:20min pra frente é pra ficar louco kkk Seu serviço e dedicação são incríveis!!! 1 HUG e THANKS EVER.
Thank you for watching!
You have to be proud to own such a beautiful preamp and amp. Pioneer is much easier to work on compared to some of the other manufacturers of that era. Some such as Sansui can be a bear to access boards. Someone, hopefully not soon, will be inheriting some great audio gear.
Thank You! Thanks also for keeping me alive for a while longer, LOL. When that time comes I'm thinking of donating the equipment to charity but not 100% sure.
U gotta love those old pcb layouts and configuration of the internal system layout so nice and easy to remove and repair it
Great preamp. Thanks for the video! 👍
I like very much to see this piecies of glorius Hi Fi of '70 & '80, increasing the interest to learn how we can make a restoration and manteinance of this equipment. Thank a lot.
Your welcome and thank you for your kind words.
Good job
Thank You!
I believe one of the most beautiful sounding and aesthetically looking pre-amp was the Phase Linear 4000.
Phase Linear made some wonderful equipment back in the day.
@@vintageaudioaddict That's early Bob Carver.
THE PHASE LINEAR 4000 was a noisy PreAmp compared to many units in the day.
@@josephsiciliano3681 Phase Linear was a very good brand with engeniered amplifiers by Bob Carver ,i tried some carver equipment in early 80´s and was amazing good but where i live there´s no technician that knows how to do easy fixes on them i ended up selling the all system and Phase linear were good built and looking good ,pioneer bought the brand but didn´t knew how to develope the brand after buying it, it died after that but one can see phase linear decks and cd player released under the pioneer logo but built with cheaper material like the CT-a1 or the PD-a1 ,cassette deck and cd player, but i have not enough knowledege about phase libnear after being bought by Pioneer
Knob & Switch Paradise....❤❤
That's for sure.
Been watching most of your restorations and I am very impressed with the condition of your equipment. Most of them look brand new or probably a year old. You're very lucky to find such great sounding hifi equipment. I just started collecting simple vintage receivers. I currently have 5 receivers in my possession. I recently got hold of a victor CD-4 GX-450 receiver and when I switch it on there is a crackling sound coming from the speakers also when you turn it off. You professional advice will be very much appreciated Sir. Thank you in advance.
Thank you for watching. I have some pretty beat up equipment also that I work just as hard on. My next video will show the repair of one of those. Pops and crackles of this sort are many times noisy transistors, or it could be a power supply issue, but if you have not cleaned the controls with deoxit do that first. It's hard to say for sure.
Wow very clean !
The guy before me is the one to thank for that. He obviously cared about his equipment.
I hope to get one of this masterpiece... One day..
Pioneer J'adore , merci pour ces videos.
Your welcome and thank you for watching.
Great days back then for High Fidelity. People would actually sit down and listen to a whole album.
Actually was able to get my parents to sit through all of "Wish you were here"and they were in shock. One of my very best memories.
LOL....Next up Mom and Dad is "Dark Side Of The Moon"
@@vintageaudioaddict Always thought about that too. Sad never happened. They had great taste in music.
i love your colection and make me need to buy some of them
Un Gran Amplificador,Amo el hifi Vintage
This looks so much like the SA 8100 I am eyeing right now.
A lot of great Pioneer gear. It's hard to choose.
I use my spec 1 as my main preamp I am running a 3 way amp setup the marantz sm 1000 a marantz sm 11 a Yamaha pro amp to power my beautiful AR 9ls that have been modded to sound amazing with new more powerful subwoofer
Nice Gear!
Love the mic input, Cordless mics can be fun, I had a FM interuptor hahaha
Thanks for sharing
Back in the day when McIntosh Labs had their traveling road show HiFi clinics I brought my Spec 1 and 2 to be tested. After running them through the tests the tech took a step back and exclaimed, "I didn't know the Japanese could build stuff this good! The distortion is below the residuals of my test equipment!" With a preamp of this quality the tone controls/filters were rarely used. It was expected that owning such equipment spoke well of the owner that they would be listening "on the flat" and not need tone controls. The only feature missing on the preamp was a "Loudness" control. It would have been nice to be able to turn it down and still get some bass response. When I was buying it was a hard choice between the Pioneer and Sansui. Guess the handles sold me and the WAF went way down when I set it up in the living room.
Thanks for sharing. This equipment brings back great memories for most folks. I'd look at the McIntosh products at my local dealer but then head over to the equipment I could afford. So many great audio products were produced back in the day.
Wow you like a lot of the same equipment I have and love I would love to see you do a Mesa baron tube amp I have 2 of them one had bad capacitors and short out the secondary power section it’s the most impressive amp I have ever heard even better than my McIntosh tube amp
I own a few pieces of tube equipment but not that one.
The mic input is good for a sing a long 🎤
Yes, I guess back in the day I couldn't remember my lines when I was listening to Dark Side Of The Moon. LOL
Un Verdadero Monstruo,Me Gustaría tenerlo
I have worked on the pioneer model CT-F1000
I have a beautiful sony amp from that period also a Luxman
Great Gear!
Amazing 👍🏻👍🏻👍🏻
It is easy to work on it!
All the assemblies being on the same plane really helped.
This is what I have in my custom Pioneer Rack, all works but needs a long overdue tune-up. Real-to-Real RT-909, Pre-Amp SPEC-1, Power AMP SPEC-2, Tuner TX-9800, 2 Cassette Decks CT-F1250, Reverb SR-303, Dynamic Processor DR-2, 12 Band EQ SG-9800, Turn Table PL-630. I am going to start going through all, can you tell me where you buy your parts? capacitors, transistors etc. Do you have a parts list for the SPEC-1 and others? Also, the power light is out on my SPEC-1 (where can i get that) and headphone jack stopped working, not sure why. Thanks
You can get parts at mouser.com or digikey.com. I don't have parts lists as I have most of the parts in stock and just get started on the next project.
@@vintageaudioaddict Thanks for getting back to me, I will start checking things out soon, just wating for some more tools to come in etc...
As good as it ever got.
Yes, great stuff
Computer motherboard manufacturers switched from regular electrolytic caps to solid caps over 10 years ago. According to articles I have read, "solid capacitors are far more robust, in addition to their extended life span (23 years) they don't have any liquid components so they don't leak or exhibit the tendency to corrode, bulge and burst and can sustain heavy use for much longer period and can operate efficiently under harsh temperatures." Would it be beneficial to replace old stereo gear electrolytic caps with solid caps ?
My personal opinion would be not to use them as they are more suited to digital electronics where they work really well. I've tried them in analogue circuits such as pre-amps for by-passing and they sound lifeless (Os-Cons).
Thanks for commenting. Ya, why not? Maybe in the future that would be an interesting project. I'll have to read up on "solid capacitors". Thanks again for sharing.
I wanna plug this or something like it into my modern amplifier.
Find a sa 9500, it has pre outs and a very similar pre
@@hegonefishing9122 it’s a preamp. It shouldn’t be a problem.
I check all new records to see how mono sounds. I use sticky notes with painters tape on the record sleeves so I remember exactly what I did before.
I’ve always bought pioneer
They made a lot of good gear.
I really enjoy your videos and after retiring from auto mechanics have decided to teach myself to do audio equipment repairs. What I find the most frustrating is sourcing transistors. Alot of them are no longer available and so the search begins for equivalents. Do you have all the transistors and capacitors in your possession and would you recommend a starter kit of both caps and transistors or do you put a list together for each unit and then order them? Thanks.
What model number is the Pioneer at 18:17? Great video!
Thanks! That's the Pioneer RG-2 dynamic expander.
Having so may equipment and deferents brands, what do you prefer? The pioneer spec 1 preamp or a Marantz Preamp I don't know maybe the 3300 or the 7t . Im asking because I have those 3 preamps , but the spec its not working wright now. Thanks in advanced!
Very informative, technical sound presentation. I have only one question: are you confident in replacement transistors? I would be very cautious replacing low noise and matched transistors with something from "current production".
First of all I'm a hobbyist not a professional. Whenever I do anything that's a "can I do this?" I consult with people that have forgotten more then I'll ever know about audio design and repair. Just in a nutshell almost all of the modern transistors are superior in almost every area to vintage transistors. Again this is not my conclusion as audio engineering/design is not my profession but is the opinion of professionals that I am in contact with. From my experience of "doing what I'm told" of using modern transistors in vintage audio equipment I've never had an issue in the 15 years or so that I've been restoring equipment.
@@vintageaudioaddict you mean you put in there some new, different spec transistors. Then you should call this more like upgrade and not so much of a restoration. Anyway, very good job and most important in this kind of work is your personal satisfaction! I gladly watch your channel!
Would they be mosfet transistors ?
I have one the same theme
Thas very nice amplifier for , rasons the cleer son .
Congratulations on owning a SPEC-1. It's a wonderful Preamp.
Kenwood 7300 opinion?
I heard they had a great pre section
No love....
You know all my old Kenwood was better than the Sansui and pioneer in dads closet ,
Just saying
So much good audio equipment was produced back in the day. Kenwood made some wonderful gear. I've never owned a KA-7300 but I bet it's a great integrated amp.
Would you consider a sa 9500 to have same pre with a amp added?
Where do you source your replacement parts? I’m looking at refurbishing an old Hafler 500 I built and just replaced the foam surrounds on my old 901 series IVs with cloth type. The Hafler was able to support the headroom necessary for the Bose active equalizer input. I’m sure the old caps are probably in need of replacement. It’s been a while but I do still have all the essentials except I gave my oscilloscope to a friend since I wasn’t using it.
Mouser.com or Digikey.com will have most of what you need. Yes, the old electrolytic capacitors need to go. Good luck with your project!
Rev possibly for phasing issues.
Yes, that too.
I own a APT Holman because it have an excellent phono stage, what about this SPEC-1 ?
The SPEC-1 sounds good with vinyl.
Is this the US equivalent of the Japanese C77/M77?
Still waiting and hoping for a 10B service :)
LOL, to be honest I'm a little scared of her. I feel like I'm responsible to restore a Picasso and I better not screw up. Just kidding......kind of.
@@vintageaudioaddict it is... I have one myself it is like a maze inside. Good luck. Does it work properly or does yours needs work?
have you ever worked on a phase liner preamp from around the same time period
Yes, I have a Phase Linear Preamp as well as a Phase Linear power amp in my collection. Great Stuff!
What I've never understood is, are there really any advantages to owning a separate power amp, preamp, and tuner, versus just a receiver? Given that so many receivers are widely respected and even worshipped, especially the monster receivers. So how are separate components better, if at all?
So What Dose that Actually Do when being Used, Dose it put out Watts to Speakers? I've Never really understood preamps
ruclips.net/video/isQ48qn1CK8/видео.html
To understand the pre-amp, understand that a separate power amp of the day has only a single input and output. I have one of these and a matching power amp. The pre-amp has all of the source inputs (turntable, tape deck, etc) and acts as a pre-amp for the phono input since turntables of the day typically didn't have them. It sends then a single output to the power amp. Power amp output goes back to the pre-amp for speaker output. You can attach speakers directly to the power amp - but then the headphone jack on the per-amp doesn't work and you can only power one set of speakers from the power amp.
A receiver tends to combine all of these things together in one unit with a radio receiver.
What would a repair like this cost ?
This SPEC-1 would need $50-$70 or so in parts and a good 8-10 hours of labor. I'm a hobbyist and I don't do this professionally so it would depend on what your tech would charge for his labor.
@@vintageaudioaddict Thanks. so if they charge 25 or 35 an hour or even more it could be a $500.00 or more repair ,just wondering.
Great Videos. Tried sending you an email to your email address but it bounced back because your folder was FULL, LOL.
Thank you very much. I'm sorry about the email issue. I try to respond to everyone but that's becoming a full time job in itself, LOL.
@@vintageaudioaddict Just wonder where you are located.
I got a sa-8800 pre amp, how would you rate it? What i've read online it's considered to be quite good
Oh Man, the SA-8800 is a great integrated!
How do you feel about Carver equipment ?
Which ones?
I remember the carver was in the Krell back room with big adcom and was definitely competitive
@@dednside5229 HR-772 receiver.
You know, I happen to really like it. I have a few Phase Linear and Carver pieces. I really respect Bob Carver. Unlike myself there's a guy that knew what he was doing. Actually going back to his Motel room and doing measurements. Making his Carver amp sound like a Conrad-Johnson and then letting the reviewers at Stereophile magazine figure out which was which. They couldn't! Amazing!
@@vintageaudioaddict Thanks, I have mine that I bought new many years ago in repair now I hope it is worth it. Wish me luck !
Do you plan to cover that Onkyo M504? Is that yours? Thanks!
Thanks for asking. Yes, I will do a video on the Onkyo M-504 in the future. She's a great amp!
Thank you man! My dad and I are fans of your channel. He wants to get his M-504 working again. We're concerned about the caps, and it has a lazy VU.
Has anyone ever heard any day and night difference over re-capping the crossover in speakers?
Re-capping any piece of electronics, it's as much about making the equipment reliable as the sound improvements that may or may not come with it. All electrolytic capacitors fail at some point but they don't all blow up the same or start sounding bad at the same time. They will all fail at some point in some way. This is why I don't try to question the manufacturers data and I replace the old electrolytic capacitors.
I had 2 recapped crossovers for my Pioneer HPM-900's, recapped with mostly identical values. Still had the original un-recapped crossover's inside the speaker, I was very skeptical of replacing the original with the new. So i pulled 1 out & replaced it & left the other original, OMG what a huge difference, I had the other crossover out & replaced in a heartbeat. It's a fact capacitors don't last forever. These vintage pieces need recapped!
I don’t really understand why you changed the transistors.
There are several problematic transistors in the SPEC-1. Google "pioneer spec-1 transistor problems" There are plenty of discussions over the past 20 years or so related to those issues.
eto gusto gusto kong mabili wala namang pambili.....
Dear VINTAGE: On my Spec 1 Pre- amp, a problem has occurred. If or when I turn the 100 hz Bass control knob to 'plus', there is then what soon becomes a violent 'hum buzz' coming out of the speaker(s). The 'hum' starts out low, but then builds and builds and gets louder and louder (as if the speakers are going to Blow) so I (of course) turn the bass knob back to zero. I have the Spec 2 Amp. Also, the tape monitor switch does not appear to be functioning. I had the unit in storage for some time and then shipped to new my new home address. Other than the 'building hum', and the tape monitor switch not working, everything else is fine. Any trouble shooting thoughts? Thanks :)
Consult a vintage stereo professional ... Shoot if you can find 1...good luck
Contact me with information on one for sale.
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