Originally Posted by TenjiT
I am using the stand and mic that came with denon
Is the "rocket" stand placed on your furniture during calibration? This can transfer low frequency vibrations directly to the mic and is one of the reasons a boom mic stand is recommended.
measure near the middle of the room where I sit
"Near"? Are you not placing the Audyssey mic at the recommended locations, with the first one exactly where your head would be while listening?
I actually downloaded a 0db 40hz test tone to do the sub gain.
What if you happen to have a particular bad peak/null at 40Hz?
The sub is in the rear left corner of the room and audyssey set distance to 13 feet. I move it to the front left of the room and redo audyssey. It actually boost the sub midbass alot and set distance to .1 feet.
Is that a typo, ".1 feet"?? I ask only because that is a very unusual result. This could be related to the bass energy traveling through the furniture, up the mic stand and to the mic...
I move the sub back to the rear left corner and use the audyssey setting from the front.
This is unconventional, to say the least. As I am sure you know, once you move a speaker/subwoofer, the Audyssey filters are no longer valid. Let's say that the front location had an 8dB dip at 50Hz...Audyssey boosts this dip up to flat (+8dB), you then move the sub to the rear where you have a +10dB peak at 50Hz...you are now running +18dB at 50Hz. You can see the problem with this methodology.
Per my example above, not surprising.
Then I bump the sub gain volume to 10:30 o'clock and 0db sub trim.
Only downsize is it somehow turn down the lower hz. As I don't hear the same rumble.
Different location, different room modes are excited producing different peaks/nulls...not to mention you are using an invalid Audyssey calibration.
Unfortunely I don't have a spl meter or the mic thing.
This is easily remedied.
The logitech can be a bit boomy and not a clean as the hsu. But I'm talking about that chest thumping loudness feel. The vtf3 is a bit better but I have to bump up the gain and sub trim pretty high compare to the recommend setting. I don't get how the recommend setting of gain at 9 o'clock and -9db to 3db sub trim can be loud. Even when I'm in front of the sub. It's definitely not louder then my logitech. With my currently setting now it's pretty loud now. Still need to tweak it though.
At what master volume level do you normally listen? Chest thump/kick won't really show up until you hit relatively loud MV levels....