I've got a question regarding the use of RS SPL meter as a final check for trim level.
Here's a scenario:
Meter reads 75dB for L,C,R,SL,SR.
Meter reads 75dB for LFE.
Is the LFE level really about 75dB? The meter could be under-read in the low bass region. If we take the meter reading of 75dB, in reality, it could be 90dB or more?
I do know that there are many websites that post the correction table for different frequencies. How do we know which correction value to apply for when the AVR is playing its internal LFE test tone? Could the AVR be playing a broad range of bass pink noise?
There are correction tables for the RS meters in the stickies for the subs forum. None of the corrections is all that drastic. THere's no way, of course, to know how to correct when the test sound contains multiple frequencies.
Moreover, using the receiver's internal test tones is relatively certain to yield incorrect results, IMO. Those tones bypass the Audyssey corrections, so say a 8 dB peak may dominate the measurement you make, but simply not be present when Audyssey is implemented.
Edited by JHAz - 1/24/13 at 8:41am