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RE: Need assistance..... again!!! Thanks

Posted by JBen (A) on September 18, 2012 at 23:52:36

In Reply to: RE: Need assistance..... again!!! Thanks posted by neolith on September 18, 2012 at 18:07:59:

Thanks, Neo. I meant low pass "section" of my setup, not the function of this filter itself which is a high pass, as you well indicate.

In my case, this particular HP filter affects only the low pass of the bi-amp. It is in series at the input of and tuned to this 2nd order low pass. The HP filter for the tweeter is separate.

However, in Atank's case the high pass filter we are talking about would affect the full panel, meaning both drivers. The big question would be if this could be enough for Atanks needs. In my case, I boosted the low end "acoustically", and then I lowered it back down with the filter. Thus, I was able to start much higher up than 80hz.

By starting higher, the shallow 1st slope removes more of the very bottom bass signal under 40hz while achieving a near parity where I wanted it further up (because of the acoustical compensation).

If Atanks starts with 80hz, 6db down at 40hz may not be enough for his purposes...then again, it could be. Perhaps he can also test adjacent values up from 80hz? The acoustics in his room may make a contributing difference, which partly happened in mine.

Failing the above, I guess he would need an active filter to support sharper slopes, something that I have contemplated but keep avoiding, for now.

In any event, it is inexpensive to try the passive approach with small-value caps, and quite easy. For resistors, the PRP have turned out to be the ticket to transparency in this kind of line-level application and cost for this top resistor quality is no issue from the start.

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Sonic Craft

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