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Analog Line Level Preamplifiers , Passive Pre-amps, Crossovers, etc.

Rolls Crossover Question SX 21
Rolls Crossover Question SX 21
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Old 28th March 2020, 01:32 PM   #1
ODougbo is offline ODougbo  United States
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Join Date: Aug 2011
Location: Maryland USA
Default Rolls Crossover Question SX 21

The Rolls SX 21 (24db) is a bare bones crossover with a few basic features. I have read reviews that said the polarity is backwards, which is not the case but what are the options to correct phase?

I had some success with this project where the phase was 90 degrees [maybe 180 degrees] off; in any case there were no signs of a dip by reversing driver connections. I thought there may be a simple answer and added a 12uf cap at the tweeter, which was a huge improvement, although the tweeter connection needed to be reversed for the straighter response.

Are there other options?
Is a reverse connection a issue, or it just about the final response?

Many thanks!

Phase Q.png
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