risottto

I got the same thing with my 5.1's just spent $64 on a new pre-amp hoping that was the problem, but I get the exact same hum with the new controller. This means it has to be in the amp somewhere. Some insight would be great, would like to avoid having to get it sent off for repairs from a third party. (BTW - I love to take thing apart and solder)

I have had the v.2 400 series speakers for nearly 9 years now. I remember having to get the controller replaced because it was buzzing and the volume adjustment created static (this was around 2002). Since then I have been blasting and blasting and blasting ..... continously since then. Last year both the woofer speakers blew from overuse and dry-rot, but the rest of the satellites and amp were fine. I have been running them with a JBL 10" sub in parallel since then. So to the relavent subject, I just acquired a set of nearly new Promedia 5.1 (NOT Ultra) from work (free.99!!). Finally an upgrade after a decade. I hooked them up and got the infamous humm/buzz/hiss out of all speakers. From prior experience with the v.2 400's, I am guessing it's the controller, this is why: * Twisting the volume knob to 80 gets rid of the hum for me. This fixes the problem (kindof), I just have to turn my itunes gain to -12db and volume to 1/2 in itunes and 1/2 gobal to be able to listen at a normal volume (until I get a deafening email notification. * when playing with the volume knob, the hum will intermittently change and dim, and the volume drops/jumps quickly sometimes. Now for questions? The strange thing, when I turn off the the speakers or unplug the controller, them make a electronic "zipping-up" sound? This is definitely from the amp, since it happens right after I unplug the controller. Is this normal on the 5.1's, I have never heard it on the v.2 400's? I Found a 5.1 ULTRA controller on ebay, can this work with the 5.1 no-so-ultra? Thanks

I have been blasting my v.2-400's for a good 7 years now, I have loved every minute of sound that has come out of them. The best money I ever spend on a set of speakers. Just recently, one of the speakers in the sub lost a bit of it's diaphragm (probably due to age and continuous bumping). I opened up the sub and disconnected that sub. I noticed that after I did this it still seemed to be working, while it was unplugged! Apparently the other speaker was throwing so much air that it made the unplugged speaker seem like it was throwing (damn!). So now I took out both the speakers out of the sub, and am using a JBL sub with a line splitter for bass. I would still like to get a new speaker to get my sub back into action. Anyone know where I can find just a single sub speaker. Is it the same woofer that is in the 2.1 system? Thanks Stan ">