Originally Posted by AustinJerry
Originally Posted by markus767
The only limit is your sub(s) and content. There's a lot of low frequency content in movies, even down to single-digit frequencies. If such low frequencies can't be controlled then high-passing the subs is the only option. On the other hand I don't see why applying a simple PEQ wouldn't be feasible.
I think you missed the point of my question. We know that excessive bass ringing in the 40-80Hz range can result in bloated, one-note bass, which can make music quite unpleasant. But what does ringing below 40Hz sound like? Is the ringing really unpleasant when all it affects is movie sound track effects?
I am at a decision point. My bass ringing is reasonably controlled down to 40Hz. Can I move on to work on taming specular reflections, or must I exert more effort on the below 40Hz modal region?
I look at it like this - but fully accept that I might be wrong, and welcome being told so if I am. Really low bass isn’t very easy to hear is it? I don't mean ringing, I mean the initial impulse. Look how the Audyssey test tones sound at 75dB - you can barely hear them. So if the initial impulse between 15Hz and 30Hz isn't all that easy to hear, then how much will hear of the 'secondary' bass that is being bounced around the room, when we have dropped it in level by 30dB, for example?
I'm not saying we should just ignore ringing below 30Hz of course. Just that we may be getting obsessed with it when the reality of what we hear isn't the same as the reality of what we see on a graph.
Here is my latest waterfall (made since I effected Sanjay's suggestions. I still have some more work to do as I need to remeasure and probably re-run Audyssey after the PJ and screen go in tomorrow).
Should I expend a lot more effort on the 15-30Hz region, and if I do, will the audible result be worthwhile? IOW, same question as yours, Jerry.
Graph is L+R+Subs, Audyssey ON.
For comparison, here is the graph of Subs only, Audyssey ON.
When I ran Audyssey, I forgot that I had the Submersives in 'Pgm 2' mode (which boosts the level of the bass below 30Hz by about 3dB). My usual practice is to run the subs in Pgm 1 for Audyssey calibration and then switch to Pgm 2 afterwards, thus preserving the boost from Audyssey's clutches. I expect that when I re-run Audyssey in Pgm1 mode and then change to Pgm2 I will see a deterioration in the waterfall wrt to the ringing, simply because I will be pumping a lot more energy into the room below 30Hz.
The question is, if I do, what should I do? Ignore it? Make an effort to control it (very hard)? Or simply revert back to Pgm1, which might possibly show a better waterfall than those above?
Any and all comments welcome.
Incidentally, if I had followed my 'preflight manual' I wouldn't have forgotten to reset the subs to Pgm1. This shows the value of consistent preflight checks (and explains why airline pilots do them). But I became cocky, and thought I would do it based on my 'experience'. Ha!
Edited by kbarnes701 - 6/18/13 at 5:46am