I would ask Rogue. Since it's not there when you put on the mute switch it's not in the amps. While it could be tubes, it also could be a capacitor or even a resistor which only exhibits this behavior when it gets to a certain temperature. I had a similar problem with my JP80 preamp a few years ago, it took forever to find the problem (was a resistor) because to get to the problem component we had to take off the bottom plate, and when we did that it cooled off the resistor and stopped the problem. A good technician should be able to find it, but Rogue is best equipped to do the trouble-shooting.
Funny noise from Tube system
Hi everyone... I have a pair of Rogue Audio M-120 Magnum Monoblocks with the 99 magnum preamp. When I have the system on for about 1 and 1/2 hours I hear a pppppfffft...pppppfffft noise over and over. It comes out of both channels and stops when I engage the mute the sound stops. I think it's temprature related, only because when I turn on everything it is silent. I replaced the tubes in the 120's but have not replaced the 99's as of yet. I bought the equipment new in 2001. Any ideas???
Thanks,
Warren
Thanks,
Warren