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Old 5th October 2013, 10:58 AM   #171
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I was quite amazed at the sound the simple $50 Guanzo preamp buffer produced via the ME550...; so who can say how much better a more esoteric preamp might sound. The Russian tubes got me, I must say, for the price to quality ratio they are just brilliant...
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Old 5th October 2013, 03:32 PM   #172
ChrisA is offline ChrisA  United States
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Distortion is a byproduct of gain. So you'd expect a unity gain buffer to sound good. The only thing that could beat it would be a "passive preamp" (basically a wire in a box.)

The buffer can do some impedance matching but this tread is way to long to know what you have on both sides of the buffer amp

Have you done any blind testing? It's hard because you need some way to flip a switch and bypass the buffer amp and not change the volume in the process. And of course you need an assistant to flip a coin and then hit the bypass or not. (the switch needs to be silent too, so yo can't hear if the assistant changed the setup.)

But there is no need to assume price determines quality in a small tube buffer amp. The parts are dirt cheap, A $9 tube and a few cents for passive parts is all you need UNLESS you need balanced outputs then you are into $100+ (each) for a decent transformer.

I just bought what turned out to be a pretty good microphone preamp for $29. Proof that you don't have to spend a fortune. This one even has regulated DC heater and a better mechanical design (without an exposed glass tube) You don't need one of these but as an example see the link:
ART-Tube-Studio-Mic-Preamp


I've recently gotten into building studio gear and of course the signal paths are all balanced, I have a goal to learn how to build my own transformers.

Last edited by ChrisA; 5th October 2013 at 03:36 PM.
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Old 18th March 2015, 11:39 AM   #173
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I think Zaph has finally conceded that a valve preamp will give a super sound regardless of the restrictive thinking with regards to 'solid state' he has so been suffering from all this time; given by the indication that we can take his non-responses to be a 'silent affirmative' in this regard...
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Old 18th March 2015, 12:06 PM   #174
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Have you had a dream?

I doubt it very much..
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Old 18th March 2015, 07:46 PM   #175
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Quote:
Originally Posted by TigerScent View Post
I think Zaph has finally conceded that a valve preamp will give a super sound regardless of the restrictive thinking with regards to 'solid state' he has so been suffering from all this time; given by the indication that we can take his non-responses to be a 'silent affirmative' in this regard...
Absolute and utter nonsense.

Read my previous replies. I have given you all the information you require to allow your ME550 to perform at it's best. A valve preamp is NOT (repeat NOT) one of those options. The BEST option is to use the preamp that the amplifier was designed for - an ME preamp.

Do I need to repeat it again to get you to understand?
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Old 18th March 2015, 08:22 PM   #176
VaNarn is offline VaNarn  Australia
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Zaphod knows ME amplifiers in every detail and it is well known that they perform at their optimum with an appropriately matched pre-amp.A valve pre-amp would require the addition of a buffer stage (solid state) or an power valve(maybe with a transformer in the o/p) to be in the running.There is no justification in terms of noise,distortion,listening or any other parameter that would warrant using a valve pre-amp to precede a solid state amplifier.
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