My point being that I tried
to find the info to help myself out and the OP of this thread, I read the '93 FAQ and it didn't seem to be in there either. It's not in the manual as well which would have been useful since then I'd know 100% that it's meant to be 15dB higher than the speakers. I'm still not 100% convinced that it should be 15dB higher since this is the first time I've heard it said that it's that much more: I had a vague recollection of 10dB but wasn't able to confirm that either.
I'm being told that it's easy to find, yet I couldn't find it despite doing various searches, a simple link might have been helpful...I often post on the projectors, calibration or video processor's sections and find that I repeat the answers/post links to common questions (and via PM too), but if I know the answer then no harm done, plus hopefully Karma will return the favour to me.
What I'm trying to confirm is that when using an SPL meter
with the test tones should the sub test tone read 90dB if the speakers read 75dB? Since the test tones are usually 30dB down from reference, this would imply that the sub would reach 120dB at reference at my seat.
(Not that it would as it would be clipping long before then). Since I understood that the sub can peak at 115dB when at reference that's where I got the 10dB more figure from (115dB minus 30dB equals 85dB for the test tone), but I've not been able to confirm this, only the 15dB figure posted on this thread.
Ah well, it's mostly academic at the moment since my sub isn't working properly having bottomed out a few times lately, so I've had to set it lower until I sort out a more heavy duty replacement.