Useing Higher Voltage Caps

[bobtec]

If I use some 500Volt caps (like in mixer or coupling) will there be a small lag...Like when I play E.C. Crossroads, the amp has to catch up with my fingers,I hate that lag, and double stops(lack of words) can sound a little "muddy"I bought some Lemcos ...A 500PF and a 560PF@ 500V I am almost ready to mod some of the caps my 193 SLP 100w ri...The Amp is so quiet,and I do not want to do all the cap changes at one time,but it takes forever to undo and redo everthing to get to the board

[demonufo]

Voltage rating of a capacitor won't effect this at all. Rated value may, depending on where in the circuit you are talking about, but really the only place where it will make an appreciable difference in such a way will be in the can caps.

The only downside of using a higher voltage cap (assuming two similar style and construction, with the ONLY difference being the voltage rating) will be a slight increase in ESR (equivalent series resistance), which is how much the capacitor acts like a resistor in use. This parameter is NOT measurable by any old ohm-meter by the way. ESR won't really have any affect in this way either. Signal will still move quicker than you could imagine, and it's not resistance causing the phenomenon that you hear.

[bobtec]

Voltage rating of a capacitor won't effect this at all. Rated value may, depending on where in the circuit you are talking about, but really the only place where it will make an appreciable difference in such a way will be in the can caps.

The only downside of using a higher voltage cap (assuming two similar style and construction, with the ONLY difference being the voltage rating) will be a slight increase in ESR (equivalent series resistance), which is how much the capacitor acts like a resistor in use. This parameter is NOT measurable by any old ohm-meter by the way. ESR won't really have any affect in this way either. Signal will still move quicker than you could imagine, and it's not resistance causing the phenomenon that you hear.

What causes it to sound like that,and is there a "fix"

[demonufo]

Well, there are a number of potential causes. The biggie is low, low filtering, which I suspect you don't have in your amp (unless you have modded it in such a way).

Another could be too much bass being amplified very early in the circuit. Often easily cured by raising the value of the cathode bypass caps on v1. Particularly if you have anything bigger than about 30uF on there. Bass can easily be added back later in the circuit if required. Like in the NFB loop is one of my favourites.