Digital Do Main started making them for their own amps over in japan i believe.
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I'm Grant.
Digital Do Main started making them for their own amps over in japan i believe.
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The trick is not to play the amp at full blast.Originally Posted by walpurgis
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Location: brighton uk.
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I'm jamie.
it wont be anywhere near that level due to room and neighbours etc.
My System
John Wood KT88 Amp.
Paradise Phono Stage
Sony TTS-8000 Turntable.
PMAT-1010 MK6 Tonearm.
Ortofon Cadenza Bronze
Sony X555ES Cd Player
Yamaha NS1000m Speakers
Trade: Magazine Journalist
Location: Hampshire, UK
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I'm Adam.
It's also worth checking that any VFET amplifier you buy actually has VFETs in it!
For those who don't know, I have an amplifier that looks exactly like the Yamaha B-2 pictured that I bought unseen for a very low price. Unfortunately, on investigation, it turned out to have had its VFET output stages removed and replaced (not very well) by some MOSFET output modules. I was rather gutted but, actually, when the installation was tidied up and made safe and properly working, and the meters re-connected and calibrated, it sounded really nice. So much so that I still use it in the lounge today. And it's probably going to be the most reliable 'Yamaha B-2' out there!
As an aside, my good friend Tim helped me with the restoration effort and took a good deal of hilarity from the whole experience. Luckily I was able to retaliate in kind when he bought a Sony VFET amplifier a few months back to find it had been subjected to exactly the same treatment! Who is this mystery VFET/MOSFET bodger, I wonder....?
Engineers: fixing problems you didn't know you had in ways you don't understand.
Senior Member
Location: brighton uk.
Posts: 4,737
I'm jamie.
i was hoping you'd see this thread adam,if i buy it you can guess where its going to be checked over
My System
John Wood KT88 Amp.
Paradise Phono Stage
Sony TTS-8000 Turntable.
PMAT-1010 MK6 Tonearm.
Ortofon Cadenza Bronze
Sony X555ES Cd Player
Yamaha NS1000m Speakers
Senior Member
Location: brighton uk.
Posts: 4,737
I'm jamie.
a very kind chap on pfm has kindly let me borrow one to hear in my system,i pick it up on sunday.happy days!
My System
John Wood KT88 Amp.
Paradise Phono Stage
Sony TTS-8000 Turntable.
PMAT-1010 MK6 Tonearm.
Ortofon Cadenza Bronze
Sony X555ES Cd Player
Yamaha NS1000m Speakers
Drunken Moderator
Location: Staffordshire, England
Posts: 37,883
I'm Martin.
Has it got the right transistors in it?
Current Lash Up:
TEAC VRDS 701T > Sony TAE1000ESD > Krell KSA50S > JM Labs Focal Electra 926.
Trade: Magazine Journalist
Location: Hampshire, UK
Posts: 3,663
I'm Adam.
Prepare for some ribbing in that case. He still maintains that VFET actually stands for "Very Fragile; Expect Trouble"i was hoping you'd see this thread adam,if i buy it you can guess where its going to be checked over
Engineers: fixing problems you didn't know you had in ways you don't understand.
I'd be cautious. I haven't tried the Yamaha SIT amps but I did try a couple of Sony ones, with assorted Tannoys. Sounded ok for the money, but well behind a decent valve amp in my view.
I don't doubt that there is potential to do some cool things with SITs, as some well documented DIY projects as well as a recent Nelson Pass project demonstrated.
However I doubt very much whether many of these old jap amps that have suddenly become desirable out of rarity value really deserve their new found cult status. Some might, but in my experience, disappointment is rather more likely.
Trade: Magazine Journalist
Location: Hampshire, UK
Posts: 3,663
I'm Adam.
I wouldn’t be cautious at all. I have three Yamaha power amplifiers and they are all superb (even the one that isn’t what it’s supposed to be!). I still have yet to hear a VFET unit myself but various pairs of ears that I trust say they are even better than the standard FET designs. As a result I’d have no hesitation in grabbing one for a good price. But not too good a price, obviously - just in case!
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Engineers: fixing problems you didn't know you had in ways you don't understand.
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