EQ'ing 29 subs... ugh! - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 50 Old 09-04-2018, 06:30 PM - Thread Starter
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EQ'ing 29 subs... ugh!

I've been eq'ing all day long.

Measure them all, and make sure they sum correctly via phase and timing, and then make sure they are flat-ish.


The red line is the end result for all the subs:


A slight house curve on the LCR's so as not to blow up the tweeters during high SPL.



Just finished, well sort-of... this is just the rough eq'ing in of everything. Now I can make fine adjustments if I want (not sure if I want/need to though...)
Gonna run with this for now and see how this does.
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Last edited by BassThatHz; 09-04-2018 at 07:10 PM.
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post #2 of 50 Old 09-04-2018, 06:49 PM
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Down 10 dB at 2 hz? Are you gonna stop there like that’s, acceptable?


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post #3 of 50 Old 09-04-2018, 07:29 PM
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Glad to see the hzhorn is operational again.
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post #4 of 50 Old 09-04-2018, 07:47 PM
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Lol @ 2Hz.

To think I was cutting my graphs off today at 10Hz...

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post #5 of 50 Old 09-05-2018, 04:30 AM
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What does that setup look like?
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post #6 of 50 Old 09-05-2018, 05:58 AM
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Just curious, apart from the 29 subs, do you run 7.1? 5.1? higher? atmos?

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post #7 of 50 Old 09-05-2018, 07:18 AM
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Why not use MSO?

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post #8 of 50 Old 09-05-2018, 07:24 AM
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Vince is so right....I mean a full 10db drop from 6hz down to 2hz? So disappointing BTH!

Lol awesome love 29 subs integration. Can we get a reading at say 125db in the bass range for fun? Any distortion down low?
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post #9 of 50 Old 09-05-2018, 11:17 AM - Thread Starter
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Quote:
Originally Posted by trilkb View Post
Just curious, apart from the 29 subs, do you run 7.1? 5.1? higher? atmos?
Right now I'm running 7.1, but in 2019 it will be 7.1.4

All I need to do is build the heights, and then get a 9905 or RMC-1 or whatnot. Already have the amps for the heights in my rack.
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post #10 of 50 Old 09-05-2018, 11:19 AM - Thread Starter
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Why not use MSO?
Because my Aspie-Aut-OCD only lets me do things the hard way... and I'm a control freak.
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post #11 of 50 Old 09-05-2018, 11:24 AM - Thread Starter
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Quote:
Originally Posted by Vince_B View Post
Down 10 dB at 2 hz? Are you gonna stop there like that’s, acceptable?
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Originally Posted by RoboAVS View Post
Vince is so right....I mean a full 10db drop from 6hz down to 2hz? So disappointing BTH!
I know right!

Gonna need MUCH MORE subwoofers for that much headroom at 2hz. LOL!
24 24's it is!
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post #12 of 50 Old 09-05-2018, 11:31 AM
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Quote:
Originally Posted by BassThatHz View Post
Right now I'm running 7.1, but in 2019 it will be 7.1.4

All I need to do is build the heights, and then get a 9905 or RMC-1 or whatnot. Already have the amps for the heights in my rack.
Nice. I found 7.1 wasnt really a huge upgrade from 5.1, but my speakers are placed in such ways that I cant localize the rear surrounds that much. And I dont know if its where I sit or how my denon x4000 upmix's 5.1 to 7.1 but I constantly have to change the amp to 5.1 on 5.1 movies because 7.1 gives me really strange echo's. Hopefully your atmos upgrade is noticeable!

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post #13 of 50 Old 09-05-2018, 12:51 PM
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Time for a rotary sub to cover that <5hz drop?
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post #14 of 50 Old 09-05-2018, 02:25 PM - Thread Starter
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EOT intro is my go-to movie for calibrating my ULF levels.

I'll just leave this here...

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post #15 of 50 Old 09-05-2018, 02:26 PM - Thread Starter
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The FP's are -3db @ 2hz.
It's only down 6.7db at 2hz from the target level.

Being flat to 2hz isn't a problem, all i'd have to do is apply a 2hz PEQ boost of 7db.
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post #16 of 50 Old 09-05-2018, 02:37 PM - Thread Starter
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Quote:
Originally Posted by trilkb View Post
Nice. I found 7.1 wasnt really a huge upgrade from 5.1, but my speakers are placed in such ways that I cant localize the rear surrounds that much. And I dont know if its where I sit or how my denon x4000 upmix's 5.1 to 7.1 but I constantly have to change the amp to 5.1 on 5.1 movies because 7.1 gives me really strange echo's. Hopefully your atmos upgrade is noticeable!
7.1 is a huge deal in my room IMO, I have closer to ideal placement for them.

The rear ambiance really adds a nice touch, especially with horror movies...

Out of all the movies that I recall playing on my system, Man of Steel and Star Trek has been the best recorded beds for overall SQ and bass levels.
A lot of movies have really weak bass or missing bass, or everything is at the wrong levels (screechy dialog).
IMO the levels of the center dialog and LFE are supremely critical.
It's literally the difference between a 100kW system and a Bose module.

Interstellar and Life of PI are also fairly well recorded.

I hate it when I have to re-calibrate my levels to every different movie that I play. Almost makes a person want to rip their hair out, and then rip the movies to PCM/MKV and remaster them properly!

What can't mixer mix properly?

Take Thor Ragnarok for example, you can literally hear that they used crappy mics for some actors and scenes, and good ones for the main characters. Some scenes have no bass in it, where there should be boat-loads...

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post #17 of 50 Old 09-05-2018, 05:26 PM
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29 subs and the response isn't even flat?

You'd likely have better luck EQing as a whole after you've time aligned and applied any filtering you need, otherwise you're going to have subs canceling each other due to phase issues.
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post #18 of 50 Old 09-05-2018, 05:49 PM
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I have a better idea....move every speaker/sub cab in as close as possible to one recliner then kick back and have your internal organs and eardrums destroyed! It'll be like wearing headphones on your whole body.
This will require that you either have to climb over cabs to fall into the recliner or move cabs and crawl into position.
Did I mention that you'll need a 3D headset to watch the movie!
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post #19 of 50 Old 09-05-2018, 05:52 PM
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Quote:
Originally Posted by BassThatHz View Post
EOT intro is my go-to movie for calibrating my ULF levels.

I'll just leave this here...
https://www.youtube.com/watch?v=bGDSu45AU7s

https://www.youtube.com/watch?v=6BpDHigsGkQ
That's not much excursion going on! My subs with PR's jump out of their skins from start to finish on that scene....you need to EQ it for total destruction (or close to it).
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post #20 of 50 Old 09-05-2018, 06:31 PM
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Quote:
Originally Posted by notnyt View Post
29 subs and the response isn't even flat?

You'd likely have better luck EQing as a whole after you've time aligned and applied any filtering you need, otherwise you're going to have subs canceling each other due to phase issues.
Phase cancellation is the bane of my existence and I only have 3 subs in my setup.

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post #21 of 50 Old 09-05-2018, 06:33 PM
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Bass, most of us can't even get 29 subs in the HT, lol. I have enough trouble EQ'ing 8, you are the man!
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post #22 of 50 Old 09-05-2018, 06:36 PM
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Quote:
Originally Posted by brettus View Post
Quote:
Originally Posted by BassThatHz View Post
EOT intro is my go-to movie for calibrating my ULF levels.

I'll just leave this here... [IMG class=inlineimg]/forum/images/smilies/biggrin.gif[/IMG]
https://www.youtube.com/watch?v=bGDSu45AU7s

https://www.youtube.com/watch?v=6BpDHigsGkQ
That's not much excursion going on! My subs with PR's jump out of their skins from start to finish on that scene....you need to EQ it for total destruction (or close to it).
Consider 29 subs with that excursion all at once. That's how you get high output with low distortion. He's not overworking anything, I can relate to that mind set.

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post #23 of 50 Old 09-05-2018, 06:56 PM
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Quote:
Originally Posted by BassThatHz View Post
7.1 is a huge deal in my room IMO, I have closer to ideal placement for them.

The rear ambiance really adds a nice touch, especially with horror movies...

Out of all the movies that I recall playing on my system, Man of Steel and Star Trek has been the best recorded beds for overall SQ and bass levels.
A lot of movies have really weak bass or missing bass, or everything is at the wrong levels (screechy dialog).
IMO the levels of the center dialog and LFE are supremely critical.
It's literally the difference between a 100kW system and a Bose module.

Interstellar and Life of PI are also fairly well recorded.

I hate it when I have to re-calibrate my levels to every different movie that I play. Almost makes a person want to rip their hair out, and then rip the movies to PCM/MKV and remaster them properly!

What can't mixer mix properly?

Take Thor Ragnarok for example, you can literally hear that they used crappy mics for some actors and scenes, and good ones for the main characters. Some scenes have no bass in it, where there should be boat-loads...
On the bolded, they desperately need your help over at Disney for the Marvel releases on BD and 4K, lol. I just subscribed to you YouTube channel. That setup is insane!!

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post #24 of 50 Old 09-06-2018, 12:57 AM
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Why so many different boxes? Just make them all ported or all sealed, have 20 up front and the other 9 in the back to make the eq process a little easier. do you have room in the back of your HT for that. Maybe build a baffle wall with all the drivers and mains in the front to save some space take it to the ceiling with the subs
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post #25 of 50 Old 09-06-2018, 06:39 AM
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Quote:
Originally Posted by BassThatHz View Post

What can't mixer mix properly?

Take Thor Ragnarok for example, you can literally hear that they used crappy mics for some actors and scenes, and good ones for the main characters. Some scenes have no bass in it, where there should be boat-loads...
This. Sometimes I watch a movie and everything sounds awesome. Then I pop in the next one and I'm like wtf do I need to turn up the LFE here? Why? And eventually realize that some scenes just have NO bass, and they should have tons, like explosions etc.

And then in others, like Jurassic World, every dino footstep or door slam shakes my house and it gets annoying lol
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Which star trek movie are you referring to? Beyond has some good lfe.

Infinity war was better then I expected. The donut ship crash shook me.

I went to all sealed subs from my horn and haven't looked back. Sealed and horn and ported really don't play nice together.

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Show us some Waterfall Graphs or a Spectogram.
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post #28 of 50 Old 09-06-2018, 09:37 AM
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Quote:
Originally Posted by BassThatHz View Post
EOT intro is my go-to movie for calibrating my ULF levels.

I'll just leave this here...
https://www.youtube.com/watch?v=bGDSu45AU7s

https://www.youtube.com/watch?v=6BpDHigsGkQ
I'm curious why we have to watch the movie on a 24" computer monitor on the floor Did all that bass make your projector fall off the ceiling an break?
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post #29 of 50 Old 09-06-2018, 10:40 AM
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Quote:
Originally Posted by derrickdj1 View Post
Bass, most of us can't even get 29 subs in the HT, lol. I have enough trouble EQ'ing 8, you are the man!
12 is my limit, and like you I've found that to be enough trouble as it is. I can't imagine all the struggles BassThatHz has to go through for 29 of them, let alone the time involved to do each and every necessary process correctly.

Just think of what he'd have to do when he makes it an even 30.
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post #30 of 50 Old 09-06-2018, 11:48 AM
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Quote:
Originally Posted by trilkb View Post
Which star trek movie are you referring to? Beyond has some good lfe.

Infinity war was better then I expected. The donut ship crash shook me.

I went to all sealed subs from my horn and haven't looked back. Sealed and horn and ported really don't play nice together.
Beyond is awful bass wise. I think there's only one or two semi decent scenes. He's talking about the first Star Trek. The only one with a well done score.

You can get horns and sealed and ported to play nicely together. All it takes is time and the ability to set delays. @lukeamdman has gotten his Othorns to play nicely with sealed, and now with ported. It can be done, it just takes work.

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