Originally Posted by DarkEnigma
Oh yeah you've got plenty of headroom. I'd say turn it up
Where the gain knob is set is not an indication of how much headroom you have, it's just an adjustment for the input sensitivity to "stage" the gain chain from the receiver to the subwoofer amplifier.
Originally Posted by m0j0
The simple answer is yes, you can bump up your sub trim by +4db. In fact, most people do run their subs a bit hot (though not all). It's a preference thing. I find some movies require me to dial back the subs a few db's (like Godzilla, for example), so there may be times when it sounds a bit much and you will need to be prepared to adjust, or just go with the most bombastic bass movies you can find (like the recent Godzilla, Blade Runner 2049, Fury, etc.) and tune to those movies first, then use that as your baseline (house curve).
I might be telling you something you already know, but, if you have a MiniDSP with the wifi adapter those quick adjustments are so easy and don't even have to get out of your chair!
Originally Posted by Ed Mullen
A +4 dB post-Audyssey boost to the subwoofer channel level is very normal/typical.
Keep in mind that running the subwoofer channel hotter consumes available dynamic headroom - so the subwoofer will hit its limits that much earlier. A 6 dB hotness increase (for example) is a doubling of the sound pressure level from the subwoofer - so it's working twice as hard as it otherwise would be for any given MV setting.
Usually not an issue with the PB16-Ultra - but all subwoofers have limits so it's good to watch for signs of compression or overdrive distress if you are pushing the entire system really loud on demanding source material.
As soon as you engage Audyssey and DynamicEQ, headroom can get eaten up really fast as well.
First Audyssey, which imo is EQs too aggressively, especially in boosting nulls. I've seen Audyssey try to EQ a small null +7dB, that's absolutely crazy. I've seen it do massive cuts as well, which can eat up headroom just as bad. See this post for a great writeup on that https://www.avnirvana.com/threads/so...21/#post-34138
Another big factor is if DynamicEQ is engaged. At -10dB on the MV DEQ is adding another 4dB at 20Hz, at -20dB it's adding another 9dB at 20Hz. So if someone adds +4dB of boost to the sub level, and turns on DEQ, then watches a movie at -12dB or so on the MV, they can be adding another 5dB on top of the 4dB already added at 20Hz.
As much as I like simplicity, I think the best thing someone can do for their subs now is to disable Audyssey on the LFE and get a MiniDSP and REW. Then just apply some low Q adjustments to tailor the bass gently. Just Audyssey alone and you have a black hole.