Originally Posted By: kcarlile
The A/B switches are generally equivalent to hooking up speakers in parallel. I'm guessing with higher end receivers, they're anticipating that people might be using lower impedance speakers.


Some of the higher end switches (as well as local volume control knobs) have impedance matching options to increase the impedance knowing they could be run in parallel. You still split the power, but at least you won't overdrive your amp.

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