The "Subwoofer Level" knob on the ICBM is labeled as going from "min" to "+9dB". I would think, though, that if you are having 12-15dB of trouble with sub output, there's something else amiss here, which is why I asked about disabling the Sony's bass management. I was thinking of disregarding the Sony's bass management and off-loading that task to the ICBM as a solution to the problem. Would that be a possible solution?

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Gonk