On the line out ... and then not reflecting the time domain corrections. But you're right, it's way more indicative than the cool little graphs on the unit.
If you start with a flat response then you know that your system is not exaggerating or diminishing any frequencies. Then you can take account of the fact that human hearing is less efficient at hearing low frequencies than it is higher ones in various ways - you can use EQ to apply a 'house curve' for example which 'tilts' the FR upwards as the Hz go down. Some people go for a +10dB increase between, say, 100Hz and 20Hz. Better still, Audyssey gives us Dynamic EQ which compensates for the way we hear but in a cleverer way than a simple house curve: the house curve will only be 'correct' at one particular volume level (because the lower the volume the faster our hearing response drops off at the low end), but Dynamic EQ adjusts the FR based on the master volume setting, so the lower the MV the more boost, the higher the MV the less boost, until Reference Level is reached and then no boost at all is applied by DEQ.
DEQ also takes account of another problem which the house curve can't address - the fact that our hearing is less sensitive to sounds from behind us, as their SPL diminishes, so DEQ also boosts the level of the surround speakers as MV is lowered away from Reference too.
DEQ does all this with no downsides, so the technology can be turned on in your AVR and then left alone. For more information on DEQ, see the FAQ, here:
EDIT: the remarks about DEQ being 'set it and forget' above refer only to movie reproduction where the content is mixed to a known reference standard. For music reproduction, there are no standards so the use of DEQ will be pot luck there. Thanks to SOM for reminding me that some people use their HT systems to play music - I use mine only for movies and sometimes forget that this is not universally the case.
It was me not Jeff.... sorry, I always forget that people listen to music in their HTs too. I only use mine for movies as you know, so I am repeatedly guilty of making statements that are true for movies but not for music. I do apologise. I will add an addendum to my post to make this clear.
Concurred all round. :)
it's the mistaken retributions that you have to watch out for :)
At reference level DEQ doesn’t apply any boosts as they are not needed. You can just leave DEQ on all the time (for movies) and it will work automatically to restore the target perceptual curve as required.
If you set your speaker levels manually after running Audyssey you could be off beam anyway wrt to reference level SPLs.
Why do you set your distances manually? I have found Audyssey to be extremely accurate in setting speaker distances - are you not finding the same thing?
Does it batpig? Or does it apply negative boost if you go beyond reference level? Although why anyone would want to go beyond reference level is a moot point anyway. Unless they are really, really hard of hearing. And if they aren't, they soon will be :)
No - the hole in the correction is nothing to do with DEQ.
Thanks Jeff. I thought it did but had temporarily forgotten.
It makes no sense to me. What I can say is that if the sub was bottoming out at -30dB, it wouldn't be likely that DEQ was causing it. And if the sub was bottoming out for ANY reason at -30dB there is something seriously wrong in that system.