Crossover cap replacement results.

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Hi all,
2-3 weeks ago i've replaced all caps on the crossovers of my Kef RDM2s with Solen metallized polypropylene types. The original ones are all Bennic bipolar eletrolytics except the one in series with the tweeter being a Bennic 4uF 100v metallized polypropylene. Did not much investigate the crossover circuit but the tweeter circuit employs 3 caps and the bass circuit employs 2 caps so it seemed to me this is a high order design.

After the replacement,
Pros: Great improvement on speed and dynamics, the soundstage gained focus and depth, tight sound in overall.
Cons: Timbral balance lost, became somehow cold and uninteresting with harsh midrange (i think this should be attributed to Solens), A bit of treble boost, the sound took a strange thin, hollow character. recalls the word "phasey" though i am not quite sure. Maybe i am a bit exaggerating this "phasey" part of the story but surely there is something about that.

Could it be that the polypropylenes have different parameterers (ESR, DF, etc) so the crossover parameters have slightly changed? Could this substitution affect the crossover points or the phase responses? Should i put the electrolytics back in place or should i substitute them with higher quality electrolytics?
By the way i am waiting for the Ansar Supersounds i've just ordered, hoping they will sound better.
Any info and suggestions appreciated,
Salman

Any advice appreciated

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Topic - Crossover cap replacement results. - Salman 05:03:27 05/15/01 (11)

Re: Crossover cap replacement results. - Steve 00:53:11 05/18/01 (2)

Re: Crossover cap replacement results. - Salman 06:34:37 05/18/01 (1)

Re: Crossover cap replacement results. - Steve 12:14:39 05/18/01 (0)

Re: Crossover cap replacement results. - Helix 02:48:19 05/16/01 (0)

Re: Crossover cap replacement results. - panhead 14:55:20 05/15/01 (1)

Re: Crossover cap replacement results. - Rosso 06:59:42 05/16/01 (0)

Re: Crossover cap replacement results. - audioengr 12:47:08 05/15/01 (2)

Re: Crossover cap replacement results. - Salman 03:05:34 05/16/01 (1)

Re: Crossover cap replacement results. - audioengr 15:43:51 05/16/01 (0)

Re: Crossover cap replacement results. - Redcoat 05:35:19 05/15/01 (1)

Re: Crossover cap replacement results.Really superb article with lots of info. Thanks nt. - Salman 07:06:54 05/15/01 (0)

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