I have a pair of RSIIIB's and seem to have the following issue. When I play loud music (only when it is loud) it sounds like the high frequency sounds cut in and out as the music is playing. It does this intermittently. Previously someone suggested I use Deoxit on the crossovers and I did but the issue is still there.

Any ideas what can cause such an issue and what would be some fixes I need to look into. Other than this occasional issue the speakers sound fantastic.

At this point I discounted the CD player, preamp and amps.

Thank you.