Official Rythmik Audio Subwoofer thread - Page 445 - AVS Forum
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post #13321 of 16401 Old 01-20-2014, 08:00 AM
 
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Originally Posted by t76turbo View Post

I said hell with it and placed the order last night online for a single fv15hp.

Now you're talking.

...biggrin.gif
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post #13322 of 16401 Old 01-20-2014, 12:07 PM
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Congrats !!!

BTW, I just read in another thread that a sub (NOT RYTHMIK) has goen missing, from what I gather it was either delivered to the wrong address or someone was waiting for Fedex van to arrive and received the sub when the owner was not around.

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Originally Posted by t76turbo View Post

I said hell with it and placed the order last night online for a single fv15hp.

Now comes the wait. The velodyne will be moved to a very small room with the ps3 to replace a klipsch sub that I think just failed because of a bad amp (capacitors I guess).
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post #13323 of 16401 Old 01-20-2014, 03:11 PM
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Originally Posted by Ozzie Isaac View Post

Just watched first 3 minutes of The Wolverine. The A-Bomb scene is insane.

1 FV15HP on -15 MV made me think my house was going to come down. It was awesome!!

Kids came running down yelling dishes were falling upstairs and I needed to stop it.

Very cool that such an articulate well behaved sub can get so crazy.

I can't wait to do that. Ordering one next week to replace a DT Supercube I. Elysium might be the first movie though. Tons of LFE that my SC1 just can't reach.
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post #13324 of 16401 Old 01-20-2014, 06:31 PM
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Originally Posted by Cowboys View Post

I recommend you to try this method to flatten the graph@ the crossover point if you don't know about it already.
http://www.avsforum.com/attachments/74825

Per this article, it makes lots of sense and here is my result from following the article


I get some work to do @ the crossover point (80hz) but it is fun stuff.

I was able to play and change my Audyssey subs distances resulting in a much smoother response at my 80hz crossover point (Yeap, got rid of that huge 15db plus dip). Here is the proof:
Green: Center speaker and subs measurement with subs distances as set by Audyssey
Blue: Center and subs measurement with subs distances reduced by 2.6' for each sub.
Dark gray: Subs only measurement set by Audyssey
Pink: Subs only measurement after each sub distance being reduced by 2.6' from Audyssey setting.

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post #13325 of 16401 Old 01-20-2014, 08:11 PM
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Quote:
Originally Posted by Cowboys View Post

I was able to play and change my Audyssey subs distances resulting in a much smoother response at my 80hz crossover point (Yeap, got rid of that huge 15db plus dip). Here is the proof:
Green: Center speaker and subs measurement with subs distances as set by Audyssey
Blue: Center and subs measurement with subs distances reduced by 2.6' for each sub.
Dark gray: Subs only measurement set by Audyssey
Pink: Subs only measurement after each sub distance being reduced by 2.6' from Audyssey setting.


Looking good! That phase cancellation seems pretty much gone. I assume Audyssey lets you adjust the sub distances independently so you can adjust phase independently?
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post #13326 of 16401 Old 01-20-2014, 08:43 PM
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^^ yes. Thanks much.
dlozy likes this.
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post #13327 of 16401 Old 01-20-2014, 11:00 PM
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And for you, Bee- 1/6 smoothing comparing subs distances set by Audyssey and subs distances tweak for my Center and subs.
Pink: Audyssey distances subs setting
Green: Tweaked subs distances smile.gif

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post #13328 of 16401 Old 01-21-2014, 03:38 AM
 
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Very nice. When I tweak the subwoofer distances, our location, we get little to no change. I'm envious. Again, very nice.

How does it sound when listening to a blu-ray disc?

When the new blu-ray player is installed, I'll do some more playing with graphs and check out the distance setting for the center channel.
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post #13329 of 16401 Old 01-21-2014, 04:36 AM
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damn I wish i could move one of my subs off the front wall...I mean Im pretty flat, but nothing like that cowboys!!!

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post #13330 of 16401 Old 01-21-2014, 05:11 AM
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^^ and the tactile feeling with one in the back is insane. I had good tactile feeling with both subs up front as I am on suspended floor but I have a lot more now plus as you said, a flatter graph with one front and one back. Thanks.
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post #13331 of 16401 Old 01-21-2014, 06:01 AM
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Quote:
Originally Posted by Cowboys View Post

^^ and the tactile feeling with one in the back is insane. I had good tactile feeling with both subs up front as I am on suspended floor but I have a lot more now plus as you said, a flatter graph with one front and one back. Thanks.

yeah I'm sure as I was doing a couple measurements last night to try the sub distance tweak (which was quickly nixed by the wife as she had a migraine upstairs) and I was sitting next to one of the subs and HOLY crap!!! like you said....i get tons of tactile feel now with my suspended floor but near field is INSANE!

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post #13332 of 16401 Old 01-21-2014, 06:10 AM
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How far is the back sub from the listening position?
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Originally Posted by Cowboys View Post

^^ and the tactile feeling with one in the back is insane. I had good tactile feeling with both subs up front as I am on suspended floor but I have a lot more now plus as you said, a flatter graph with one front and one back. Thanks.
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post #13333 of 16401 Old 01-21-2014, 07:29 AM
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^^ 7.6 feet from MLP (not really nearfield) but it is directly behind my 4 seats recliner with the front driver about a foot firing toward one of the 4 seats (not my seat or my MLP)
As you can see from the picture, my seat is where the mic stand is.

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post #13334 of 16401 Old 01-21-2014, 07:33 AM
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Originally Posted by Brian Fineberg View Post

HOLY crap!!! like you said....i get tons of tactile feel now with my suspended floor but near field is INSANE!
HOLY crap is right smile.gifsmile.gifsmile.gif
I was watching the first 30 minutes of that Ninja shadow of a tear last night at -15MV and it kicked my butt hard. Not sure if I ever can stand listening at reference with this set up frown.gif
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post #13335 of 16401 Old 01-21-2014, 07:42 AM
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Originally Posted by BeeMan458 View Post

Very nice. When I tweak the subwoofer distances, our location, we get little to no change.
Make sure you completely back out of your Denon menu after changing subs distances for the changes to take effect. Lots of people in the REW thread didn't know about this; therefore, no changes after measuring. Your REW graph should change quite a bit after changing subs distances by a foot or two.
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post #13336 of 16401 Old 01-21-2014, 07:42 AM
 
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Originally Posted by Cowboys View Post

Green: Tweaked subs distances smile.gif

What are you doing when you tweak the subwoofer distances. When I tweak the subwoofer distances a few feet, nothing to very little happens and when something does happen, it's to the bad, not the good.
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post #13337 of 16401 Old 01-21-2014, 07:44 AM
 
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Make sure you completely back out of your Denon menu after changing subs distances for the changes to take effect. Lots of people in the REW thread didn't know about this; therefore, no changes after measuring. Your REW graph should change quite a bit after changing subs distances by a foot or two.

Not arguing, I back out of what ever menu I'm fussing with, and REW shows changes taking place. I'll try backing out of the menu system completely and see what takes place.
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post #13338 of 16401 Old 01-21-2014, 07:52 AM
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Originally Posted by BeeMan458 View Post

What are you doing when you tweak the subwoofer distances. When I tweak the subwoofer distances a few feet, nothing to very little happens and when something does happen, it's to the bad, not the good.
I suggest you read this link I posted earlier
http://www.avsforum.com/attachments/74825
In my case, I was able to achieve my posted graph by reducing each sub distance by 2.6'. YMMV.
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Originally Posted by BeeMan458 View Post

Not arguing, I back out of what ever menu I'm fussing with, and REW shows changes taking place. I'll try backing out of the menu system completely and see what takes place.
Then should be fine then. I just have to back out to where it says manual setting.
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post #13339 of 16401 Old 01-21-2014, 08:27 AM
 
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Originally Posted by Cowboys View Post

I suggest you read this link I posted earlier
http://www.avsforum.com/attachments/74825

Thanks for reposting the link. On antihistamines, the last thing my brain wants to do, is work.

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post #13340 of 16401 Old 01-21-2014, 10:53 AM
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One other thing I noticed was when setting to 14/lo and run Audessey, REW graph shows roll of at about 15hz. Flip it to 14/hi and redo Audyssey calibration, REW graph shows roll off about 10hz. At least in my room, that is what it behaves. Anyone notices that?
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post #13341 of 16401 Old 01-21-2014, 11:05 AM
 
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Originally Posted by Cowboys View Post

One other thing I noticed was when setting to 14/lo and run Audessey, REW graph shows roll of at about 15hz. Flip it to 14/hi and redo Audyssey calibration, REW graph shows roll off about 10hz. At least in my room, that is what it behaves. Anyone notices that?

We have roll off at 12.40 Hz. Our room has pretty much, zero gain.
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post #13342 of 16401 Old 01-21-2014, 11:08 AM
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^^ with 14/hi setting?
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post #13343 of 16401 Old 01-21-2014, 11:11 AM
 
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Originally Posted by Cowboys View Post

^^ with 14/hi setting?

Yes. Just checked, 14/HI.

Room is 23' long by 15' wide, cathedral ceiling, a 10' average height, with large openings to other spaces that are large enough to extend the measurements, which would further guarantee limited chance of room gain.

Currently in the process of adding a universal blu-ray player to the system that hopefully will expand the dynamic range of the reference level play of the sound system. Once up and running, I'll do more measurements and regarding distance settings, see if what you suggest, aids the measurement graph.

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post #13344 of 16401 Old 01-21-2014, 12:21 PM
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Originally Posted by BeeMan458 View Post


We have roll off at 12.40 Hz. Our room has pretty much, zero gain.

Did your new receiver fix the early rolloff challenge you were having before? I believe you were rolling off at the 17hz range?

 

Have you posted your latest response? Curious more than anything. :)

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post #13345 of 16401 Old 01-21-2014, 03:10 PM
 
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Originally Posted by dominguez1 View Post

Did your new receiver fix the early rolloff challenge you were having before? I believe you were rolling off at the 17hz range?

Have you posted your latest response? Curious more than anything. smile.gif

Yes, it seems the Anti-Mode 8033S II was the culprit regarding the early roll off. Unsmoothed graph below. At -6dB down from peak reading @ 30Hz, we're getting a room measurement of 11.31Hz.



Currently installing a new universal blu-ray player. Tomorrow, I'll play with the settings some more. Once finished with setup, I'll do a proper tape measure measurement of our living room for cubic footage and submit our room/system measurements to your ULF thread and apply for honorary membership listing. biggrin.gif

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post #13346 of 16401 Old 01-21-2014, 03:41 PM
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Originally Posted by BeeMan458 View Post


Yes, it seems the Anti-Mode 8033S II was the culprit regarding the early roll off. Unsmoothed graph below. At -6dB down from peak reading @ 30Hz, we're getting a room measurement of 11.31Hz.



Currently installing a new universal blu-ray player. Tomorrow, I'll play with the settings some more. Once finished with setup, I'll do a proper tape measure measurement of our living room for cubic footage and submit our room/system measurements to your ULF thread and apply for honorary membership listing. biggrin.gif

-

Very nice bee! Congrats!

 

So, were you able to tell a difference in sound between this one and the early rolloff response? Or were they actually the same response, but antimode was masking the true response graphically?

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post #13347 of 16401 Old 01-21-2014, 04:05 PM
 
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Originally Posted by dominguez1 View Post

Very nice bee! Congrats!

Thanks! biggrin.gif

Quote:
So, were you able to tell a difference in sound between this one and the early rolloff response? Or were they actually the same response, but antimode was masking the true response graphically?

Anti-Mode wasn't masking the response, it was mechanically cutting it off with a 24dB roll off at 20Hz.

XT w/Anti-Mode:



XT32, no Anti-Mode:



To the right of the roll off, pretty much the same but a huge difference in low frequency rumble to the left of the original roll off.
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post #13348 of 16401 Old 01-21-2014, 07:04 PM
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after much tweaking tonight this is as flat as i can get her:


Panasonic 65VT30 | Denon x4000 | Emotiva XPA-5 | Emotiva XSP-1 | Emotiva DC-1 | PSB imagine B's |PSB image c5 | PSB B4's | DUAL PSA XS30 | OPPO 103 | minidsp
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post #13349 of 16401 Old 01-21-2014, 07:31 PM
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^^ can you post the graph before tweaking. That dip at your crossover is still there. What are the subs distances before and after tweak. Is this graph with minidsp engaged?
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post #13350 of 16401 Old 01-21-2014, 07:39 PM
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No. I deleted them. :/

The subs were at 17.2 and 17.0

I tried all different distances and 14.2 and 14.0 was the best and yes dsp is engaged

Like I said before this tweak doesn't do much for my situation. Oh well

Panasonic 65VT30 | Denon x4000 | Emotiva XPA-5 | Emotiva XSP-1 | Emotiva DC-1 | PSB imagine B's |PSB image c5 | PSB B4's | DUAL PSA XS30 | OPPO 103 | minidsp
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