Seems to me that a lot of designers are missing opportunities for their amps in the power supply area - SMPS are relatively cheap for the amount of clean current they can deliver... and there are plenty of designs out there that are unnecessarily current limited by their power supply...
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Vintage amplifiers that could challenge or approach current state of the art amplifiers
- Thread starter restorer-john
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You are right. The power supply section is often hit by cost cutting. I also think some of the decisions are made because of audiophile tradition. -Like the toroidal transformer is more sought after than EI.
Hi Everyone,
How about this one? i'm kinda looking at this one for my next purchase, anyone has experience with this Yamaha?
it would very nicely combine with my Yamaha C2x Pre-amp
The shop that sells them (they have several) i trust 100% , my Pre- amp came from them.
Ever had a better amp than the Yamaha MX-10000?
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I have a few of the P2500S
I run 1 in my bedroom system. It's superb. The P3500S was also extensively tested on AP gear by an EE who I think is also a member on ASR. The test results were really good & worth finding his test results. I'll link it if I find it.
Joe
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Maybe...but not in stand alone. The pascals in my core 59's are really good. But for stand alone it was a serious amp & did it's job very well. It was also jewelry of the nice kind.
Joe
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I know. It's the one on the french forum, right?
YAMAHA A-S701 - tear-down, thoughts about the internals & few measurements
The R-N803 has the same mechanical build, power supply, heat sinks and power amp section as the R-S700, A-S700/701/801 and R-N800A. However, they have different signal-to-noise at 200mv input, according to Yamaha: A-S700 has 110dB A-S701 has 99dB R-S700 has 107dB R-N803D has 100dB R-N800A has...
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Jojo
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Kenwood KA-660. 0.006% thd / 107db SNR
60 watts/ 8Ω
As far as i understand, it is pretty similar to the "basic" series amplifier wich was presented here (M1-M2-M1A-M2A).
You got a tone control bass/treble plus one control related to sub bass.
For the story, it was a gift for my father wich had a very tired denon from the 80's. He needed an amplifier with cd/phono/aux connects.
I don't have any data to prove anything, but for the ears the difference between the two amplifiers on the same pair of speakers was impressive. Like having a new pair of Speakers. I saw the smile at my father face ; i saw the young man he was, who wanted to have a good sounding amp but didn't had the money back in the days.
Since then, every time i go to visit him, he's happy to remind me how good this amp sounds. And i'm very happy for him.
PS : i bought it 40€ on "leboncoin", french ebay. Even when you considere the actual offers, i think it's a bargain. There is the KA-880D too, more or less the same thd/snr but with much power (100w/8Ω)
Don't confuse with KA-660d.
60 watts/ 8Ω
As far as i understand, it is pretty similar to the "basic" series amplifier wich was presented here (M1-M2-M1A-M2A).
You got a tone control bass/treble plus one control related to sub bass.
For the story, it was a gift for my father wich had a very tired denon from the 80's. He needed an amplifier with cd/phono/aux connects.
I don't have any data to prove anything, but for the ears the difference between the two amplifiers on the same pair of speakers was impressive. Like having a new pair of Speakers. I saw the smile at my father face ; i saw the young man he was, who wanted to have a good sounding amp but didn't had the money back in the days.
Since then, every time i go to visit him, he's happy to remind me how good this amp sounds. And i'm very happy for him.
PS : i bought it 40€ on "leboncoin", french ebay. Even when you considere the actual offers, i think it's a bargain. There is the KA-880D too, more or less the same thd/snr but with much power (100w/8Ω)
Don't confuse with KA-660d.
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Hoping that I can get some insight. I have a Luxman 100V turntable that I use a small step-down transformer to power. Recently I have found that the transformer is injecting noise into my MM phono stage.
Is it safe to operate the turntable on 120V or should I replace the transformer with a quieter model? Open to other suggestions as well, but do plan to keep the turntable.
Please start a new separate Thread for your question. Thank you for your cooperation and understanding.
Sure. I think I found the answer from @restorer-john on a different thread anyway.
100V Electronics in US - Voltage Converter Really Needed?
Simple question: If I use a Japan market amplifier rated for 100V in the US do I really need a voltage converter?
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Musicofchance
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Im still at a loss to find a well insulated RCA cable to fit these suckers. Ive forced some on and have knackered the connectors, luckily not the amp ones.
The only ones that fit are the 'kenable' brand. Some will say well thats good enough but im guessing its about excepting once theyre on, you keep that cable specifically for this amp.
Brothers in arms, long time ago. I moved to the USA with that Luxman model (I posted a pic in another thread,). I ended up buying a high end transformer that was probably similar in cost of the amp at the time, and moving it as far away as possible.
terryforsythe
Major Contributor
Responding to the title of the thread, I have owned an Adcom GFA-585 and an Adcom GFA-5802 (the GFA-585 was damaged in shipping to Adcom for repair, and was replaced with the GFA-5802). They both sounded very good, but I would give the edge to the GFA-5802, although I was not able to do an A/B comparison and the placebo effect may have impacted my judgement.
Prior to my Adcoms I had a Carver M1. It had a sweeter sound, probably high distortion, predominantly second harmonic if I were to guess. If I were to characterize it, it sounded a bit like a tube amplifier. I enjoyed it, but these days I am not much into the sweeter sound for the music to which I mostly listen. Also, if I remember correctly, it did not have as much control over the bass as the Adcom amplifiers.
My first amplifier was a Rotel integrated amp (EDIT: RA820-BX I think). It sounded very good and was a good value at that time.
Prior to my Adcoms I had a Carver M1. It had a sweeter sound, probably high distortion, predominantly second harmonic if I were to guess. If I were to characterize it, it sounded a bit like a tube amplifier. I enjoyed it, but these days I am not much into the sweeter sound for the music to which I mostly listen. Also, if I remember correctly, it did not have as much control over the bass as the Adcom amplifiers.
My first amplifier was a Rotel integrated amp (EDIT: RA820-BX I think). It sounded very good and was a good value at that time.
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i have the feeling that some issues could come from the aged parts I understand that some gifted refurbishers can get really great sounds from old good units replacing parts with new and better ones I am sure of this
Capacitors considitions in particular could be very critical I would replace them all
Capacitors considitions in particular could be very critical I would replace them all
terryforsythe
Major Contributor
I think that the total amount of time left on may have some impact. I use to leave my GFA-585 always on so that it would constantly be up to temperature. It had to be sent in for repair twice in 12 years. I only turned my GFA-5802 on when listening to it. It was in great condition when I sold it after over 19 years.
you should have checked with caps have been replaced Imho there is little need to run an amp very warm at idle I had warm amps that sounded confused and cold amps that sounded cristal clear I think it depends more on the circuits and component used
wow they are both splendid indeed I had the little 545 and it was quite good I live in a small flat The power was more than enough
Great brand Adcom expecially from a quality price ratio point of view
It's the "temperature" that eventually causes a problem.
Heat is the enemy of all components and can eventually cause a breakdown of everything.
I'm still running 3 545II's and 2 535II's in my multich system.
All AFAIK all are original and all I've done was to check&tweak bias settings.
Very bad name choice for a device that heats up considerably...
..I would not leave it unattended playing high spl anthemic passages.AH! Just saw what Sal wrote above
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SirPaulGerman
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What about the Yamaha P2200, came out in 1976, around $1100
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