Problem with my Marantz 7008. Last week I was watching a movie and noticed that the center speaker volume was suddenly diminished, almost nothing. I ran Audyssey, and that improved (but not resolved) the sound issue. The problem is that the center channel levels are now +12.0, while the other channels are decreased from before (previous center channel volume was +1 or so). Last January-March, we rebuilt the basement and home theater, but the wiring was retained and has been working correctly for the past 6 months.
The center speaker is a Def Tech CS-6080HD, with powered amp. When the receiver is turned on, the light turns on red (which is proper functioning) and the bass level has not been changed. I assumed that it was a speaker fault, took it to my local Def Tech repair center, and they confirmed that it is functioning properly. I also connected my Klipsch center channel, and it is also almost silent at correction 0 dB, almost matched when increased to +12dB (and the two fronts are at -2 dB).
My current set up
Receiver: Marantz 7008 (refurbished from accessories4less, purchased Jan2015)
Center: Definitive Tech CS-8060HD (purchased new Dec 2013)
Fronts/Sides/Rears: definittive tech
Subs : HSU VTF-15h x2
I would have thought that if it was an issue with the speaker wire alone, then there would be no signal. I was wondering if there is anything I can do to check the receiver in place or if there are any known glitches to cause this? Or does it mean that I need to unhook everything and lug it into a service center?