Except the folks here don't get it, the folks that rave up the Benchmark 3 are on no more stable ground than the guys that rave this up. "Highly Recommended".
All audio devices are imperfect, IMHO. One could call some things 'nearing the best anyone knows how to do at this point,' and it would be more truthful than to call something stunning or some other superlative.
One could of course say, 'this amplifier measures well, which bears partial correlation to how it sounds,' which would also be truthful.
But, people don't want to read things written in such terms. They won't buy magazines or read free ones paid for by advertisers (although advertisers probably wouldn't pay for it either).
I complain about it. The IMD muddles everything together. That's not how the recording was intended to sound.
I mostly agree with you on that - but there are precious few really good recordings around IMV.
Ask a roadie ?
They go to 11, on the Markw4's amp.There's a pot called Drive and another one called Gain...crank them both up, in this order for you.
No. Already known we could do that with greater complication and lots of gnfb. With matched transistors this thing I showed can go down so low, i cant measure it (-160). maybe SG could.
However, thats isnt the point... how low harmonic distortion can be made.
It is that fets do not offer any particular advantage. Even less so, with unobtainable fets.
JC said he uses fets because fets dont have high order harmonics. But, this proves that bipolars in this and many topologies do not also.
-RNM
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Two 8-legs is not a lot of complication but frankly the THD stuff is lost on me (for audio that is).
When guitar amplifiers are adjusted to make this much distortion, the settings are labeled "clean."
Two areas where JFET’s are better that bipolars are RFI susceptibility and input current. In the Analog Devices book “Op Amp Applications” on page 7.125, BJT vs JFET for RFI rectification, the conclusion is that BJT’s are 1500 times more sensitive that JFET’s. A bipolar first device in a phono preamp can cause current to circulate in the phono cartridge, so a DC blocking cap should be used on the input.
I have heard many bipolar based audio products that sound good to me, so both BJT's and JFET's can sound good with the right design.
You still dont get it. Or pretend not to? Not too sure how practical/scale-able up to power amp levels use it would be.
Unless, you are making SET amplifiers, fets offer no advantage for audio performance. Measured or subjective.
So, if JC amps consistently are rated more accurate (?) sounding it probably is due to a number of other things besides just using fets.
??
THx-RNMarsh
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