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post #1 of 4 Old 09-11-2013, 08:54 PM - Thread Starter
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When comparing 2 subwoofers and 1 sub has 3 db advantage at 20 hz over one sub, will Audyssey correct this to make the advantage of the other sub mute ?
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post #2 of 4 Old 09-11-2013, 09:06 PM
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If you mean one sub is -3dB at 20 Hz while the other is flat, Audyssey might or might not "see" differences in in-room performance as the lower 3 dB limit for the sub, meaning Audyssey might not try to equalize the frequency response identically at 20 Hz.

On the other hand, if you mean one sub has a 3 dB advantage in output at high levels versus the other, things are different. Audyssey does not run high SPL tests to assess the power/frequency limits of the sub system. so all it knows is the frequency response in room at the level the test signals play back. not knowing one sub runs out of steam at 20 Hz 3 dB before the other, Audyssey can't "correct" for that invisible (to it) difference.
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post #3 of 4 Old 09-11-2013, 10:34 PM
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Quote:
When comparing 2 subwoofers and 1 sub has 3 db advantage at 20 hz over one sub, will Audyssey correct this to make the advantage of the other sub mute ?

The term "Flat Frequency Response" is actually +/-3dB, however, die-hard subwoofer fans don't settle for anything less than a ripple-free ruler flat response.
Audyssey may or may not make up for -3dB at 20Hz. It depends on what the flatness target is encoded in Audyssey. But if it does fill up -3dB, it will be actually cutting the sub amp power by half. You may get away with 3dB boost at 20Hz if you are running something like JTR OS with amplification power in spades, but your sub will surely will run out of steam if it has average wattage figures.

I reckon if you are in +/-3dB ballpark, consider yourself lucky. Audyssey or no Audyssey

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post #4 of 4 Old 09-13-2013, 08:33 PM
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Also depends on whether you are using an AVR with Audyssey Sub EQ HT which can EQ dual subwoofers (currently only available with most models that use MultEQ XT32).

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