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previous: Rick Erickson [QUOTE]If you see ceramic caps used... -- 1132256322 View Thread

Re: Are all caps tonally equal?

11/18/2005 6:41 PM
Bruce /Mission Amps
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Re: Are all caps tonally equal?
Personal opinion of course, but, the only times I've heard ceramic coupling caps sound OK is in some low voltage "harp only" amps, the rest all sound a bit grainy to me.  
I've also redone a large number of those old Salvation Army store PA and guitar amps over the years and they always come to life with cheap plastic caps over a cheap ceramic caps if the ceramic caps are even there in the first place.  
 
Replacing the ceramic coupling and tone caps, as seen in the tone stack of amps like an old Silvertone, takes those amps to a much higher level IMHO.  
 
I don't know how much ESR in the main filter caps it takes to make a significant tonal difference Rick, but like you, I've noticed over the last few years that a few of the Sprague E-caps everone loves to tout, have been getting worse and worse, while some imports like the F&T caps are way better and about 1/2 to 2/3 the size.  
 
IC:  
It depends on who the "maker of choice" is for IC this or that go around (I'm sure they are just a relabeler) as some of those have been the worst caps I've installed in high voltage supplies.  
Using some of those cheapie 220uF/350v caps from NSC in a few Fender amps created some awful ghost noting and power supply groaning, what I think is IMD through the power supply.  
I had some cheap Rubycon HI-V caps from who knows where anymore, that would crap out in a matter of a couple months too.  
But I've had virtually no trouble with the inexpensive Xicons or Korean Samwha caps when use within their limits.  
 
Bruce

 
Replies:
Rick Erickson Thanks for the reply Bruce. I also ... -- 11/20/2005 2:26 PM