QUOTE(SSJBen @ Aug 28 2016, 01:24 PM)
It is a common practice that many good speaker companies will have at least achieve 75db before the roll-off slope of a speaker. It's not an industry standard, but it's a widely accepted method where generally people will accept that say a speaker at 45hz will have 75db of volume output.
XO Hz is not 75dB. It's typically -3dB point.
QUOTE(SSJBen @ Aug 28 2016, 01:24 PM)
Audyssey, YPAO, MCACC and (omg) AccuEQ can barely get the bass management settings correct half the time. How many times have you seen satellite speakers being set to Large? How many times have you seen satellite speakers getting a 40hz crossover?
Audyssey does not set the XO frequency or speaker size. It can't properly splice a main speaker with subwoofer because it doesn't measure the combine response sweep. Even Dirac can't. Maybe Dirac Unison can, but we have no news of it.
QUOTE(SSJBen @ Aug 28 2016, 01:24 PM)
there is no set standard of what 0db on the pre/pro/AVR average volume is. Some people set their reference volume to be 75db, some 80, some 85 and some 90. Theater A 0db then is not the same as Theater B at 0db.
Are you sure there are people who set master volume to 75dB (as shown on the front panel/GUI display) ? That is impossible. What you see is 75 / 80 / 85 / 90 , definitely not in dB unit. That is in "absolute" display, which varies by manufacturer.
A quote from D&M manual:
QUOTE
Volume Display : Set how volume is displayed.
• Relative : Display ---dB (Min), in the range –80.5 dB to 18 dB.
• Absolute : Display in the range 0 (Min) to 99.
Reference level is a standard provided the system is calibrated correctly. That's the way a content is presented. Production 0dB = Theater A 0dB = Theater B 0dB
http://www.thx.com/consumer/thx-technology...eference-level/