Originally Posted by indebtbassfreak
SB13-Ultra showed up, Yay!! As my older Integra AVR self calibration is only the XT version and i really didn't like what it took away from the sub as well at it wanted mains and center at full range, i opted to go manual mode. Front mains at 80Hz/Center 70Hz/,,,,, front end sounds much crisper,, the rest of the surrounds at 80Hz. LFE at 120Hz with the 25Hz setting a little hotter at +3. Left sub at default volume and the AVR sub channel volume quite hot at +6. My living room is terrible for quality bass as there are no 90 degree corners as the room is hexagon shaped with floor to ceiling windows thus the reason i have everything a little hot.
First impression as i've put the sub through about two hours of listening, (i know that's not much), It took me about an hour to get used to the different tuning vs my SPL1200-R. I'm very impressed so far with how it has made the music sound. Other than the +3 on the 25Hz setting,,, everything else i left flat. Took me a little bit to get used to how well it performs above 40Hz,, complimenting my week KSB-3.1 mains. Definetly new rattles throughout the house.
Decided it was time to throw on a movie (Jurrasic Park 3) in DTS-ES-Matrix. I'll cut to the chase,, when the plane crashed into the woods and was hitting the trees, the impact was felt with authority. Shorty after when the T-Rex was fighting what ever that other thing was called all i did was smile then check the windows to make sure they didn't crack. (slight exaggeration).
So compared to my Velodyne SPL1200-R in this early stage,, i'm finding what i had hoped for. Deeper lows, more volume with no straining, and a unexpected improvement in music as this larger sub handles higher frequencies very well.
If it's true that a sub needs a break in period, then i guess there will be better performance to come. Cheers!!
This is an older post that I am just reading now, so I don't know if you will notice my response, or whether it will be helpful to you. But, FWIW, if I were you I would still try running my system with Audyssey XT. When Audyssey does it's calibration, it uses a 75db test tone to set all channels, including the sub, to play at the same volume at the MLP. It is pretty typical for most people to want elevated bass, so most add of us add anywhere from +3 to +6db to their sub(s) post calibration. Some of us add even more. Doing that doesn't alter the filters that Audyssey sets in order to remove distortion from the sub/room interaction.
Similarly, Audyssey reports the F3 point (the low frequency where a speaker is down in volume by 3db) to the AVR, which then sets crossovers based on its own internal algorithm. So, if you want to manually change the crossovers to 80Hz (or to anything higher than where your Integra set them) that is perfectly fine, and will again not interfere in any way with Audyssey's room correction efforts.
But the actual room correction that Audyssey does can be very helpful, particularly for bass frequencies. So, if you want to try it, you can have your cake and eat it too, insofar as the manual settings you mentioned. The FAQ, linked below, contains a lot of useful information about how to use Audyssey, and if you ever have additional questions there are usually people willing to help out.
I hope that this explanation helps out a little.
And congratulations on your new SB-Ultra!