XLR & RCA caps

I have the cardas caps on rca females on my pre-amps; no change in sound I can detect

Same for me. I have some rubber Neutrik ones I threw in to make up an elecronics order.

That being said, if I could see them from the front, I might go for something expensive.

After reading the responses, I'm going to look into these caps. Elizabeths comments on how the video images improved goes great lengths to show that though our ears may play tricks on us, our "lying eyes" can discern things more easily and is repeatable.

If video images improve with these, then there has to be something going on with these RCA inputs acting as conduits, of sorts, to some kind of interference which play havoc with the sound.

All the best,
Nonois

Thanks guys, i also bought a bag of 1000 rubber white rca caps from a "seller in Taiwan" and i just picked up really nice rubber XLR cover from Neutrik like Riffer did. they were about $0.50 each. a far cry form 30.00 per pair for audioquest. Also i agree with riffer, these plugs are on the back, if they were visible then i'd look for something like the Cardas. But since the idea is to cover, and rubber is non conductive i don't see how they can be better or worse than Cardas or Audioquest.
When i get everything covered i'll post a pic and let everyone know my findings.

IMO shorting plugs are likely to be a superior alternative to caps for RCA inputs, if in fact either one accomplishes anything at all. (Shorting plugs should not be used on outputs, of course).

Whatever a cap may accomplish, if anything, a shorting plug will also accomplish. In addition, it will essentially short to ground any RFI, noise, or other interference that may be picked up or generated in the circuitry and internal wiring the RCA jack is connected to, from where it might to a small degree couple into the signal path.

Outputs, for which shorting plugs should not be used, are presumably much less susceptible to those kinds of effects than inputs, in part due to the fact that output impedances are usually vastly lower than input impedances.

FWIW, I use inexpensive shorting plugs on unused RCA inputs in my system, although I'm doubtful that they make any difference. If I were to ever use those inputs, I would first treat the RCA connectors with Caig Pro Gold to remove any oxidation or corrosion that may have developed over the years despite (or perhaps because of) the presence of the shorting plug.

Regards,
-- Al