Not so fast....Please revisit your winner rated post#269 and my response to that in post#272.
Agreed, if it is a "pure" null, it knows and likely wouldn't even bother trying.
Your before chart does show (what I have to assume to be) a room null with the deep drop around 50Hz. Unfortunately there is little detail on exactly how Audyssey works, but I know @ATLAudio had a similar situation where Audyssey gave up on trying to provide flat bass below a room null he had. Once he eliminated the room null, Audyssey did a good job of maintaining flat in-room FR down to around 10Hz!
As a test, try moving your sub a foot or two to see if you can reduce the "before null" and see if the target curve improves. Even though this might put the sub somewhere where you would never actually locate it, it would confirm why this is happening. You could then look at feasible alternate locations or adding a second sub to reduce/eliminate the null!
@William Lemmerhirt and/or @PENG , I generally thought an EQ system like Audyssey could not do much with a null, since increasing the amplitude of the signal (gain) would only make the null deeper! Yet Audyssey seems to have done an impressive job of reducing it (if their chart is to be believed). Any ideas what is going on here?
That is true. Think that goes without saying and a second one is on the possible horizon. It is adequate for the time being
Well in general boosting nulls is basically useless although you might get another 3db out of one, not worth it. As far as audyssey goes, I believe it has a 9db limit for safety. Since the screenshots are only predictions made by audyssey it’s hard to say what the “after” really means. I can’t say if Audyssey recognizes that it can only boost so far, or vice versa and thinks it can fix everything. I feel like the former makes sense.
Your before chart does show (what I have to assume to be) a room null with the deep drop around 50Hz. Unfortunately there is little detail on exactly how Audyssey works, but I know @ATLAudio had a similar situation where Audyssey gave up on trying to provide flat bass below a room null he had. Once he eliminated the room null, Audyssey did a good job of maintaining flat in-room FR down to around 10Hz!
As a test, try moving your sub a foot or two to see if you can reduce the "before null" and see if the target curve improves. Even though this might put the sub somewhere where you would never actually locate it, it would confirm why this is happening. You could then look at feasible alternate locations or adding a second sub to reduce/eliminate the null!
@William Lemmerhirt and/or @PENG , I generally thought an EQ system like Audyssey could not do much with a null, since increasing the amplitude of the signal (gain) would only make the null deeper! Yet Audyssey seems to have done an impressive job of reducing it (if their chart is to be believed). Any ideas what is going on here?
After looking back at this, I think you’re right. I’m a little surprised that my previous words escaped me, but thanks for the reminder lol.
I’ve played with the MultEQ curve editor and it is very clumsy. The changes also take a while to upload. I would love something with PEQ. Are folks having better results with something along the lines of a MiniDSP HD? Besides the investment, can similar results be attained with the curve editor? That is of course besides the dips in the frequency response.
In my experience, using REW with minidsp hd in combination with Audyssey would help very little, not worth the effort. Others reported better results. So, like anything else, it depends.
Peng was getting good results from Audyssey before he tried the miniDSP!
Yes, I have some issues with my room that were more than Audyssey could handle alone. A Mini really helped me dial it in a lot better.
I've kept mine at 80, since I determined that sounded best... but I don't really recall going higher. I experimented mainly between 60 and 80, with 80 winning me over for the balance of better bass performance from the subs, and allowing the speaker to focus more above that which resulted in slightly more clear mids and highs.
I spent some real quality time the last few days going through all of my settings and experimenting with different crossovers and DSP modes. When I'm at 120 hz you can definitely feel a little but more bass, but things get a little muddy in the mid to high range. To me it almost sounds like putting a blanket over my speakers. I've determined that at 80 hz I'm still getting plenty of bass and a little bit more clarity.I've kept mine at 80, since I determined that sounded best... but I don't really recall going higher. I experimented mainly between 60 and 80, with 80 winning me over for the balance of better bass performance from the subs, and allowing the speaker to focus more above that which resulted in slightly more clear mids and highs.
Which begs the question if there is a balance point, so to speak, where the subwoofer stops offering a LF performance improvement against what one can hear up above from the speakers.
I might have to experiment between 80 and 100, just to see if I continue to hear any difference.
For my setup, I first mad the decision of 80 for the BMRs. With the 3s deeper extension and more capable driver, I thought 60 was good... but the pudding proved to still sound better at 80.
*shrugs
This will warrant some further examination.
Does your REW plot show a dip at 63 Hz if you sweep with the 2 mains and subs all running? If not, then Audyssey is doing its job, but it does not mean you will like the effect.
Thsee are older charts. The first one is with no dsp.
Are you increasing the sub level a few db from where Audyssey sets it? If so, keep in mind when you audition different crossover settings, you're not auditioning different crossover settings...you're auditioning different tonal balances of the overall response. Correcting the sub and main speakers to the same curve in the bass region will allow you to change the crossover setting without changing the overall response.I've kept mine at 80, since I determined that sounded best... but I don't really recall going higher. I experimented mainly between 60 and 80, with 80 winning me over for the balance of better bass performance from the subs, and allowing the speaker to focus more above that which resulted in slightly more clear mids and highs.
Which begs the question if there is a balance point, so to speak, where the subwoofer stops offering a LF performance improvement against what one can hear up above from the speakers.
I might have to experiment between 80 and 100, just to see if I continue to hear any difference.
For my setup, I first mad the decision of 80 for the BMRs. With the 3s deeper extension and more capable driver, I thought 60 was good... but the pudding proved to still sound better at 80.
*shrugs
This will warrant some further examination.
I do bump my sub level a few dB after I get a flat response. I'm using a MiniDSP for my subs too. Audyssey doesn't quite get me there on its own. The purple line on the 2nd graph is with no DEQ and the rest are with DEQ and the different offsets.
I do not bump my sub trim. I have actually been struggling with the decision to lower it as I think audyssey runs ‘me a little too hot for my mostly music usage. I have not done that either, yet.
