Questions About Rear Speakers. Jump to Latest Follow. For rear speakers...it all depends on your listening preferences. will hooking up an amp to the factory front 6x9's make a difference in sound and bass or is it not worth it???Speaker boundary interference does not only apply to your front wall. Bass waves also reflect off your ceiling, side walls and rear wall, causing comb filtering when they combine with the direct sound from your speakers. In this case we need a more general formula to calculate the cancellation frequencies.
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