Basic amp questions that I can't find a complete answer to
These may seem like newbie questions, but dang it if I can't "google" my way to concrete answers to some of my amp questions. These are regarding quality name A/B amps like ATI, Anthem, Outlaw, B&K, etc.
1. If an amp is listed as 200 watts per channel x 7 channels, I know that power is divided among the channels and that you don't get 200 wpc for every single channel simultaneously. So does that mean the amp is capable of 200 total watts at any given time needed, or can it produce that for two channels at once, such as the left and right channels?
2. You can buy a 200 wpc amp for 2, 3, 5, or 7 channels, and I read that "you should get the extra channels in case you need them later" from sources like Audioholics, for instance. However, does that not reduce the output of the amp per channel? Do you not ensure yourself more power to a given 3 channels by only having those in the amp, as opposed to spreading it out to 7 channels? Or is the amp built differently to produce more power for those other channels if you add them.
3. Are the LCR plugs wired any differently to get more power? Would it matter if you switched the inputs (and appropriate output wire) around? If I'm using a 7 channel-amp to drive four surround channels ONLY, should I not use the LCR because they built differently than the one surround output I'd still need to use?
4. If power truly is divided up among 7 channels, then a 200 wpc amp really negligibly more powerful than a 150x7 or even 125x7 amp, correct?
5. If you're using subwoofers that have their own amps (my SVS subs have 800w sledge amps), then the LCR and surrounds are barely using any power at all, correct? An extra amp to drive the front three becomes overkill, as does a 200+ wpc amplifier in general?
Thanks in advance.
Video: JVC RS620/X9500 projector, Stewart 130 screen, Panasonic ub820 UHD player
Audio: Anthem 60 preamp, B&K Reference 125.7 amp, NAD ci-940 amp
Subs: dual SVS PC-12 cylinders
Speakers: Jamo 626k4 in-wall mains, Jamo 631k4 bi/dipole surrounds, DefTech DI6.5R heights