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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: Re: Very soft bass - scratching my head posted by Chris O on February 28, 2007 at 13:01:04:
Many thanks for the suggestions.The reason the phenomenon seems very odd to me is that I've done the same topology (i.e., plate chokes, interstage, grid chokes, though with different tubes) before and the results were quite excellent. So I am thinking that may be I misspecified the circuit?
I forgot to mention that the rest of the frequency spectrum sounds excellent, somehow just the mid/low bass is very weak/subdued (the difference is like full range vs mini-monitor).
My choice of coupling caps is odd but I've determined that in my system the best sounding coupling caps are the Black Gates VK or N series (as good as or better than V-cap, old AN silver foils, Mundorf Silver/Gold, etc.). The only BGs with high voltage ratings also are high values so I have to use the 100uf and 68uf ones. I really like the 22uf 350V VKs.
Cheers.
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