Time for some re-capping?

squarewave

Member
2009-05-20 3:20 pm
Hello DIY,

I'm in the process of "tuning up" the active amp section from some studio monitors and Im looking at replacing two signal path caps (in series with signal) at the front of the input stage-just after the electronic xover.

In the HF amp there is a 1.0uf /63v polyester yellow box no-name thing this is way too tiny to be of any good. Approx 5mm x 5mm x 5mm.

I have room /can make room, for something like a red or blue poly "box" style, or a tubular of some type that is around 1" long by 1/2" in diameter.

The LF amp has a 100uf/ 25v bipolar electrolytic bypassed with a 0.1uf/250v tiny blue box poly.

So...

For the LF I was considering a Kaisei 50uf/63v or a 100uf/ 25v for the LF bypassed with a Vishay 0.1u 1837..

Ive used the Kaisei in the past, in a power amp/ non signal path, and think they are very nice, gentle, neutral.

But not sure if the polar or nonpolar is best here

I dont have room for a "huge" film cap 47uf or so..

And the HF I really have no idea what I can fit in place that will work well, and be neutral.

Looking for some input (minus the DC:)

Thx

SW ;)
 

analog_sa

Member
Paid Member
2002-08-14 1:47 pm
Cascais
For the LF I was considering a Kaisei 50uf/63v or a 100uf/ 25v for the LF bypassed with a Vishay 0.1u 1837..

I think the polarised Kaisei are easily the best sounding caps in current production. No experience with the BP types but polarised (pardon the pun) opinions have so far discouraged me from trying them out. The question is: does the circuit demand bipolar types?

As for bypassing... i would not even consider it. Perhaps it made sense with the original caps but i can't see those 1837 helping the Kaisei at all, on the contrary.