I just calibrated with the WOW disk. I had forgotten about how different WOW sets reference compared to Avia. Wow sets reference 5 dbs quiter than I have always used with the Avia disk.Note: I used the Omnimic to record the spl of the tones, and the WOW instructions are to set your Master Volume to 0 and adjust speaker level until the meter reads 83 db for speakers and 86 db for the subwoofer.
My speakers are too efficient for this to be possible, even with the individual speaker levels all the way down to -12 I can't have 0 on Master Volume = Reference.
So for example, on my reciever I had it calibrated (with Avia) so that -1.5 on the Master Volume is reference. With the WOW disk I am at reference (meaning the omnimic spl meter says 83 db's)
when the master volume on the receiver says -7.5.
So, when I watch a movie at -11.5 on the receiver (the way I've had it setup this whole time since I used Avia) I've always thought to myself I'm 10 under reference - not so according to WOW. I'm actually at 5 under reference when I watch a movie like that assuming WOW is correct.
The bass was 3db hot according to WOW with this curve:
So I have to back down the bass 3 db to truly be flat, assuming WOW is correct - right? That said it looks like the hot bass is right at 20hz (the above graph was with the mbm-12 on, with the mbm-12 turned off on there is no hump around 70hz
) so for practical purposes I really am flat, especially for music that doesn't have a lot of really low bass.
Ha, I'm sure this is interesting stuff... to no one but me...
but I like having a place to record all this info.