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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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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: Optimal -3db high pass point for volume control? posted by andy evans on March 5, 2006 at 03:28:00:
...around there, your system will sound shy of bass. The rule of thumb is that the filter (= -3dB) point should be at least 2 octaves below the lowest frequency you want to pass, and for decades in this industry and hobby, that 'lowest frequency' has been 20Hz. So calculate what you need for about 5 Hz and you'll be safe.If you're trying to save money, you might use something like a 1µF (or smaller) SoniCap-1 as a base (not 'bass') cap so you have plenty of room for adding those Russian teflons in parallel.
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Follow Ups
- Andy, there are musical fundamentals below 32Hz, and if you use a filter point somewhere... - jeffreybehr 08:18:55 03/05/06 (2)
- Yes, but 32Hz is the lowest commonly used - andy evans 10:06:19 03/05/06 (1)
- 'Zero' is not the correct term. 'Filter point' is, and that's defined as the frequency that's -3dB. BUT... - jeffreybehr 14:11:55 03/05/06 (0)
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