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Message: <blockquote data-quote="Doxquzme" data-source="post: 8906512" data-attributes="member: 689267">That's not the point being made, not what I said really.If you have a 25% decrease due to the load of the aftermarket speakers being 4 ohms versus the amps ouitput rated power at 3 ohms,  with a difference between those and  the OEM's increased efficiency (if applicable) of 2 to 4.5db, you will definitely hear it.If on the other hand, the difference is only the 25%, and all other factors are roughly equal, then no, it's not likely to be significant.OEM speakers are generally 2-4.5db more efficient on the same power, combine that with a drop in output using the 4 ohm aftermarket speakers, that's the accumulative difference, not necessarily and absolute but significant and something to be aware of and to check on when using the OEM amp as was suggested by the OP.</blockquote>

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