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Parallel-mono operation: why aren't many amps able to do it? What are the downsides?

damacman said:
They all do it, but not on all models. You'll note that a rear panel switch for this mode is provided for models that have this feature. If the amp lacks it, I sure wouldn't go about doing it anyhow - well, not unless it's your objective to destroy the amp on power up.
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Anyway, QSC RMX models (RMX 850, RMX 1450, etc) supports parallel input mode --they even have rear panel switch for parallel mode. However, unlike Crown Com-Tech manual, QSC RMX manual does not show speaker wiring diagram for parallel mono, nor does the manual mention that the amplifier's parallel mode is for parallel mono. In fact, the manual says you need to have two speakers for parallel mono --each speaker sound exactly the same with each other.

Despite parallel mono isn't mentioned in the manual, is it safe to wire one speaker as parallel mono when driven by QSC RMS parallel mode?
 
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Kreshna said:
Anyway, QSC RMX models (RMX 850, RMX 1450, etc) supports parallel input mode --they even have rear panel switch for parallel mode. However, unlike Crown Com-Tech manual, QSC RMX manual does not show speaker wiring diagram for parallel mono, nor does the manual mention that the amplifier's parallel mode is for parallel mono. In fact, the manual says you need to have two speakers for parallel mono --each speaker sound exactly the same with each other.

Despite parallel mono isn't mentioned in the manual, is it safe to wire one speaker as parallel mono when driven by QSC RMS parallel mode?
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I'd contact QSC for clarification.
 
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