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RE: 1st order tweeter xovers? Not pros and cons BUT passive line level Vs a single spkr level cap

Posted by andyr (M) on March 21, 2008 at 03:43:22

In Reply to: 1st order tweeter xovers? Not pros and cons BUT passive line level Vs a single spkr level cap posted by Timbo in Oz on March 7, 2008 at 18:47:26:

Timbo, mate,

A 1st order series line-level cap will IMO sound much better than the equivalent spkr level cap. However, this requires a separate amp for the tweeter, right - ie. bi-amping! :-))

For a 1st order filter, the equations give you the -3dB point. However, you don't want the -3dB frequency for the tweeter HP to be the same as the LP -3dB frequency ... you need to spread them apart a bit, to get it reasonably flat across the XO region.

And, yes, component quality is just as important here as in all other applications. So some caps will sound much better than others. However, whether Holco sounds better than Vishay sounds better than Beyshlag sound better than Phillips ... is something I cannot comment on. However, *definitely* some reses sound better than others! :-))

If you are using reses in series (to tame the tweeter) then I would recommend the hugely expensive Duelund - based on feedback from a USA mate of mine who mods Maggies for a living. He tried out a lot of reses.

Reses in parallel are perhaps not so critical?

Regards,

Andy

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