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RE: Addendum

Posted by KIS on April 27, 2012 at 18:35:50:
With the 57s, they have a 1100pF to roll of the bass.

Remove this cap, and depend on the natural roll off. They sound better this way, but less SPL obviously.

Alternatively, use an air capacitor here. It is as good as having no cap IMO. You can not do this with the 63 and that is one of the reason why many still prefer the 57s. The original 1100pF cap in the 57, is not as bad as the 220uF cap found in the 63.