Originally Posted by N2AUDIO
That may be true, but then why did it not lessen the loudness on my other THX-certified components like my former Onkyo TX-NR875 and Anthem AVM 20 v2.21? I never noticed or experienced a significant roll-off in loudness like I do with this Pioneer?
I can't find an Onkyo TX-NR875 model anywhere, Onkyo US, Eu, UK or Asia. Are you sure you don't mean SR875 which is referenced everywhere?
while the SR875 is THX Ultra 2, THX announced a new feature called Loudness Plus in late 2007
& it didn't start getting into AVR's until early 2008. The new certifications were named THX Ultra2 Plus & Select2 Plus. to me it looks like both your Onkyo & Anthem predate Loudness Plus. I'm not an Onkyo follower so I don't know all the model years & dates. I did find a TX-NR828 in all Onkyo's sites, & it has THX Loudness Plus & Audyssey Dynamic Volume/EQ. if yours was the SR875, then you did not have Loudness Plus.
my guess is what you hear is the effect of THX Loudness Plus.
check these out, especially the description on how it works in the HTM article. THX is full of marketing descriptions but there is a good layman terms description on what part of it does in the HTM piece:
"THX Loudness Plus automatically adjusts the front-to-back speaker level relationship as you turn the volume level down.Q: The sound waves in the illustration seem to indicate lower volume in the front
, and the same volume--but with marginally different propagation patterns--in the rear. Wouldn't this just make the rear speakers sound louder?...
A (THX): Yes, the rear speakers will sound louder when the volume is lowered below reference level. As the master volume is turned down, we gradually adjust the levels of the surround speakers up. This will make the rear speakers sound louder when compared to playback without Loudness Plus, but this is actually much closer to the intended effect that you would get when listening at reference level."
my take is part of what THX Loudness Plus automatically does at lower volumes is lower the fronts or increase the surrounds, so that the surrounds sound louder relative to the fronts.
if you don't like the effect of Loudness Plus, you can turn it off:
pg 95 in your manual.
try it and see what happens at the same normal listening volume. you can easily do an a/b comparison. please let us know what difference it makes
I just leave it on all the time & forget about it Edited by ss9001 - 8/9/13 at 1:10pm