Official Funk Audio Thread - Page 43 - AVS Forum | Home Theater Discussions And Reviews
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post #1261 of 1274 Old 01-13-2020, 05:34 AM
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Originally Posted by ereed View Post

Agghhh gotcha! Time to order another! Ha!

Between the two spots for one sub you showed on graph I'd personally take the green since you have better summation across the board. Which one sounded better to you?
Wasn't able to "listen". I don't have any fronts (selling/sold my LCR and waiting on new ones). So I only measured to see which spot to play around with.

I'll be using Dirac Live for room correction once all is setup. So from my understanding it is better to have peaks, no matter how large, then a null as good room EQ can flatten peaks without limit, right?

I'll only be EQ'ing the MLP (so 5 measurement spots total all around the spot where the graphs I posted where taken).
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post #1262 of 1274 Old 01-13-2020, 06:02 AM
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Originally Posted by BigCoolJesus View Post
Wasn't able to "listen". I don't have any fronts (selling/sold my LCR and waiting on new ones). So I only measured to see which spot to play around with.

I'll be using Dirac Live for room correction once all is setup. So from my understanding it is better to have peaks, no matter how large, then a null as good room EQ can flatten peaks without limit, right?

I'll only be EQ'ing the MLP (so 5 measurement spots total all around the spot where the graphs I posted where taken).
Yes, you can use PEQ filter to reduce peak. I have showed an example how my minidsp 2x4HD reduces peak at 2 diff places for reference. As you can see I have null at 45hz due to room mode and you do not want to boost that. Those are very narrow nulls and you just leave those alone. Only way to fix that is adding more subs and/or moving subs/seating if possible.
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Theater room: Sony 45es | 120" screen | Panasonic BDT500 | Rotel RMB-1077 | Outlaw Audio 976 | Klipsch RP-280F/RP-450C/RP-160M | Funk Audio subs | MiniDSP 2x4HD | Crowson Tech MAs | Surgex XR 315 | GIK room treatment

TV Room: Panny 60 inch | Rotel RMB-1075 | Rotel RSP-1068 | Axiom Audio M60/VP150/QS8 |
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post #1263 of 1274 Old 01-13-2020, 08:30 AM
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Attached is the comparison of the original spot I was using (shown from the Dirac Live results page) and the new spot (shown using REW measurements).

Obviously the new spot behind my seating is leaps and bounds better in terms of measuring. It does stink to "hide" such a gorgeous subwoofer behind the couch, though it is still somewhat visible. But in this case performance trumps pretty.

Can't wait to get my new LCRs and dial this in more.
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post #1264 of 1274 Old 01-13-2020, 09:06 AM
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Quote:
Originally Posted by BigCoolJesus View Post
Attached is the comparison of the original spot I was using (shown from the Dirac Live results page) and the new spot (shown using REW measurements).

Obviously the new spot behind my seating is leaps and bounds better in terms of measuring. It does stink to "hide" such a gorgeous subwoofer behind the couch, though it is still somewhat visible. But in this case performance trumps pretty.

Can't wait to get my new LCRs and dial this in more.
Which preset are you using?

Theater room: Sony 45es | 120" screen | Panasonic BDT500 | Rotel RMB-1077 | Outlaw Audio 976 | Klipsch RP-280F/RP-450C/RP-160M | Funk Audio subs | MiniDSP 2x4HD | Crowson Tech MAs | Surgex XR 315 | GIK room treatment

TV Room: Panny 60 inch | Rotel RMB-1075 | Rotel RSP-1068 | Axiom Audio M60/VP150/QS8 |
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post #1265 of 1274 Old 01-13-2020, 09:59 AM
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Which preset are you using?

No EQ
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post #1266 of 1274 Old 01-13-2020, 01:53 PM
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Originally Posted by BigCoolJesus View Post
No EQ
Try the max extension preset. I'm willing to bet your 30hz and below will improve. I use that in my large open room due to no room gain.

Theater room: Sony 45es | 120" screen | Panasonic BDT500 | Rotel RMB-1077 | Outlaw Audio 976 | Klipsch RP-280F/RP-450C/RP-160M | Funk Audio subs | MiniDSP 2x4HD | Crowson Tech MAs | Surgex XR 315 | GIK room treatment

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post #1267 of 1274 Old 01-13-2020, 02:01 PM
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Originally Posted by ereed View Post

Try the max extension preset. I'm willing to bet your 30hz and below will improve. I use that in my large open room due to no room gain.
I'll definitely play with the presets. Just a little worried about possible clipping using a preset and then having Dirac EQ on top of it.
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post #1268 of 1274 Old 01-13-2020, 02:10 PM
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Originally Posted by BigCoolJesus View Post
I'll definitely play with the presets. Just a little worried about possible clipping using a preset and then having Dirac EQ on top of it.
The max ext is to get the below 30hz up which appears to look like you don't have room gain....the dirac eq will be to bring down peaks that has nothing to do with below 30hz boost. Why not post a sweep of no eq and then max ext and lets see how it looks?

Theater room: Sony 45es | 120" screen | Panasonic BDT500 | Rotel RMB-1077 | Outlaw Audio 976 | Klipsch RP-280F/RP-450C/RP-160M | Funk Audio subs | MiniDSP 2x4HD | Crowson Tech MAs | Surgex XR 315 | GIK room treatment

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post #1269 of 1274 Old 01-13-2020, 02:15 PM
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Originally Posted by ereed View Post
The max ext is to get the below 30hz up which appears to look like you don't have room gain....the dirac eq will be to bring down peaks that has nothing to do with below 30hz boost. Why not post a sweep of no eq and then max ext and lets see how it looks?
I'll post some comparison sweeps later this week.
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post #1270 of 1274 Old 01-13-2020, 06:08 PM
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Hey all.

So, I did some major rearranging and was able to free up two spots to try my 21.0L in. I have included REW sweeps of my MLP.

Red is the sub at the Front Left of my room, immediately beside my left speaker.
Green is the sub at the back right of my room in the corner, immediately behind my seating area.

The only plus to the Red line (Front left) is a little more room gain below 20Hz. But I'm thinking the absence of serious nulls for the Green line (Back right corner) makes that the spot to use?

Either way, it beats the hell out of the graphs I posted before when it was stuck in the Front Right corner (pics a page or two back for refresher).

Thanks!
Will your new mains be crossed lower than 80Hz? If so that dip for the location represented by the green line won't come into play so that would likely be a good spot for the sub.

 
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post #1271 of 1274 Old 01-13-2020, 06:36 PM
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Will your new mains be crossed lower than 80Hz? If so that dip for the location represented by the green line won't come into play so that would likely be a good spot for the sub.

Definitely at least 80Hz crossover (I am assuming the JBL's will easily play down to 80Hz based on ratings). I was actually wondering if, with the sub being placed right behind my seating, I shouldn't use a lower crossover if the mains measure well...say 60Hz so that by 120Hz the sub has rolled off substantially. Or would an 80Hz crossover still have substantial roll-off by the time bass could become directional from the sub at/above 120Hz? Part of my previous questioning regarding at what point during a 12dB/octave crossover roll-off does output becomes inaudible/negligible (-3dB? -6dB?).
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post #1272 of 1274 Old 01-13-2020, 07:03 PM
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Definitely at least 80Hz crossover (I am assuming the JBL's will easily play down to 80Hz based on ratings). I was actually wondering if, with the sub being placed right behind my seating, I shouldn't use a lower crossover if the mains measure well...say 60Hz so that by 120Hz the sub has rolled off substantially. Or would an 80Hz crossover still have substantial roll-off by the time bass could become directional from the sub at/above 120Hz? Part of my previous questioning regarding at what point during a 12dB/octave crossover roll-off does output becomes inaudible/negligible (-3dB? -6dB?).
60Hz-120Hz is a full octave so at 12dB per you definitely won't hear anything at 120Hz. I'd be willing to bet by 90Hz it would be inaudible as that's 6dB down. Judging by the measurement you posted 70Hz would probably be fine. That sounds like it would keep your speakers well above their lower F3 while mitigating that 78Hz null from the sub.

 
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post #1273 of 1274 Old 01-13-2020, 07:22 PM
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60Hz-120Hz is a full octave so at 12dB per you definitely won't hear anything at 120Hz. I'd be willing to bet by 90Hz it would be inaudible as that's 6dB down. Judging by the measurement you posted 70Hz would probably be fine. That sounds like it would keep your speakers well above their lower F3 while mitigating that 78Hz null from the sub.
Awesome, thanks! Just waiting on the speakers and then will get it all to mesh together. 70Hz does seem like a happy medium to try.

I'm excited as based on the measurements with the sub in the new spot I should be getting a lot smoother response after EQ along with stronger output under 20Hz.
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post #1274 of 1274 Old 01-14-2020, 08:22 AM
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While setting crossovers is good based on the speaker specs as a starting point.....the room itself will dictate which xover is best. My mains play down to 32hz flat....I could use 60hz, 80hz, etc but 100hz was best on overall frequency response of my room. Also my dual 8 inch drivers in my mains can't compete with the sound quality and spl of the subs.

Theater room: Sony 45es | 120" screen | Panasonic BDT500 | Rotel RMB-1077 | Outlaw Audio 976 | Klipsch RP-280F/RP-450C/RP-160M | Funk Audio subs | MiniDSP 2x4HD | Crowson Tech MAs | Surgex XR 315 | GIK room treatment

TV Room: Panny 60 inch | Rotel RMB-1075 | Rotel RSP-1068 | Axiom Audio M60/VP150/QS8 |
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