So I got to output the test tones and here what I got with the Radioshack meter while holding it as still as possible:
FL 72dB
C 71dB
FR 73dB
SR 71dB
SL 71dB
Sub oscillates between 68 and 74dB.
I have to say that I am kind of surprised to find a difference of 1 and 2 dB from the fronts as I thought the SPL meter was pretty accurate. I tried to shift a few inches back and forth and to the sides but it stayed pretty consistent.
I have n idea why measuring the sub, the needle doesn't stay still so it's impossible to get an exact measurement.
I guess I'll leave everything the way it is as Audyssey probably did a better job than I did measuring these levels, I was just expecting to find the level of all the speakers to be the same when measuring with the SPL meter but they're not.
