Originally Posted by arnyk
Most trims go to only +/- 12 dB not because a larger range would instantly blow up speakers or amps, but because the gain range has to be created by extra amplification, and it has a cost in terms of parts cost, noise and distortion. +/- 12 dB is pretty usable range and there are few real world situations where it is not adequate without some other failure or error in system setup.
Hey Arny, now that you are talking about channel trims, I have a question. When I see something like +12dB, I don't think about speakers being blown up - that is a function of total system gain including the volume knob which I have control over. I think about signal overloading and clipping of the preamp signal to that channel. When an AVR / surround processor sets positive channel trim to a particular channel / speaker, do we need to worry about the signal being boosted into clipping? Is it a safer practice instead to cut / attenuate the rest of the channels for balance instead of boosting the one that is too low? It seems like if this was a problem the mfg's wouldn't give the option to boost, only to cut and auto room correction (which I have very little experience with) would never boost a channel too much to risk clipping.
2-Ch (HT L/R): Oppo BDP-105 BD, Adcom GFP-750 pre, Bryston 10B Sub Xover, Bryston 4BSST2 / Paradigm Signature S4 v.2 (L/R), (2) SVS SB12-NSD (Subs)
Home Theater: Bryston 4BSST2 amp / Paradigm CC-590 (C), Outlaw 7700 amp / (4) Def Tech UIW-RSSII (LS/RS/LB/RB), Samsung 46” 3D LCD