Official Rythmik Audio Subwoofer thread - Page 944 - AVS Forum | Home Theater Discussions And Reviews
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post #28291 of 28303 Unread Yesterday, 03:04 PM
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Who is planning to purchase/upgrade to one of the new subs. I believe the new subs will be well worth the wait!

@rcohen ?
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Don't tempt me!!!
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post #28292 of 28303 Unread Yesterday, 07:42 PM
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Well I'm waiting for word on the F18HP. When that gets announced I am very interested in one or two of them.

Enrico any word on this model?
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post #28293 of 28303 Unread Today, 05:47 AM
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@enricoclaudio @Rythmik

Hey guys is the new place similar to the old warehouse just bigger? You moved closer to me which could be a bad thing. I'd like to stop by sometime and check out the size of the enclosures for the new 18" offerings if that's okay.

Display - LG OLED
Receiver - Denon
Speakers - Klipsch
Subs - Rythmik
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post #28294 of 28303 Unread Today, 07:36 AM
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Ran some more sweeps, this time with mv at 0 and no deq. Also attempted subwoofer distance tweak. If I plan on listening at -15 to -20 can I just bump the trim on the sub 18db? It's at -10.5

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post #28295 of 28303 Unread Today, 09:06 AM
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Originally Posted by trp3383 View Post
Ran some more sweeps, this time with mv at 0 and no deq. Also attempted subwoofer distance tweak. If I plan on listening at -15 to -20 can I just bump the trim on the sub 18db? It's at -10.5

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Those long term compression sweeps look great. It looks like compression doesn't begin to set in until you reach what I might call the 112 dB sweep. Since reference volume, for movies, is 85 dB on average with up to 115 dB peaks in the LFE channel you can probably just about hit that level without any compression in your room. If you wanted to really be safe maybe setting the volume limiter on the receiver to be - 3 dB from reference.

I am planning a theater build for a 1700 square foot enclosed rectangular room, which is really close to the size of yours. I'm surprised that the pair of L22s can get that loud without compression setting in. I was planning to get a pair of F25s for my room just to be sure I can hit reference volume peaks in the LFE channel with any compression setting in, but maybe a pair of L22s or a pair of F15HPs will get me basically there.

Where do you have the subs placed in your room?





Also, it does look like just under 70 Hz you are measuring at a small null, looking at the CC + Sub measurement. You might also try to measure the mains + Sub, to see if you get the same thing. I bet you will. If you want to try to fix it, I think you have to either move you seating location, move your subs, or play with the phase on one of them to try to get rid of the null. In doing this you might move it to another frequency, but it would be nice if you can get rid of it all together. I only have one subwoofer right now and my subwoofer only has a 0/180 phase switch. I was very lucky that just flipping the switch got rid of a null that I had. It gave me another peak though, but those are fine since the EQ can fix those just fine.

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post #28296 of 28303 Unread Today, 10:23 AM
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Originally Posted by Schrodinger23 View Post
Those long term compression sweeps look great. It looks like compression doesn't begin to set in until you reach what I might call the 112 dB sweep. Since reference volume, for movies, is 85 dB on average with up to 115 dB peaks in the LFE channel you can probably just about hit that level without any compression in your room. If you wanted to really be safe maybe setting the volume limiter on the receiver to be - 3 dB from reference.

I am planning a theater build for a 1700 square foot enclosed rectangular room, which is really close to the size of yours. I'm surprised that the pair of L22s can get that loud without compression setting in. I was planning to get a pair of F25s for my room just to be sure I can hit reference volume peaks in the LFE channel with any compression setting in, but maybe a pair of L22s or a pair of F15HPs will get me basically there.

Where do you have the subs placed in your room?





Also, it does look like just under 70 Hz you are measuring at a small null, looking at the CC + Sub measurement. You might also try to measure the mains + Sub, to see if you get the same thing. I bet you will. If you want to try to fix it, I think you have to either move you seating location, move your subs, or play with the phase on one of them to try to get rid of the null. In doing this you might move it to another frequency, but it would be nice if you can get rid of it all together. I only have one subwoofer right now and my subwoofer only has a 0/180 phase switch. I was very lucky that just flipping the switch got rid of a null that I had. It gave me another peak though, but those are fine since the EQ can fix those just fine.
Yea I can't get that dip solved by phase, it introduces other issues. I have them on in spots A and B in the room.



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post #28297 of 28303 Unread Today, 11:09 AM
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Yea I can't get that dip solved by phase, it introduces other issues. I have them on in spots A and B in the room.



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Thanks, for letting me know about the locations.

Too bad phase doesn't help with the null. Actually, now that I think about it, if you have Audyssey MultEQXT 32 (which I think you do), and you are hooking them up to the receiver with two separate coax cables, then Audyssey is already messing around with the phase trying to get things as good as possible. If you are open to change in placement of the subs, then that may also work. With room aesthetics I can understand if that doesn't work, but the L22s are nice and narrow to give more placement options without getting in the way in terms of floorspace. I guess outside of that the only other thing that might help is bass traps and I'm not sure how much benefit you would get from this. Maybe passing along your room diagram and frequency response along to GIK Acoustics and ask them.

Even if you can't fix the null, you do have very good results. It is really flat and extends down below 20Hz before it rolls off. Your brain, some have said, supposedly does a nice job of filling in nulls if they are only over a small frequency range.
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post #28298 of 28303 Unread Today, 11:28 AM
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Well, im moving and deciding to sell my FV15HP so it doesn't sit in storage for a year or longer. Sad to see it go but will be able to pick up a FV18HP down the road when I have a space again.
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post #28299 of 28303 Unread Today, 11:50 AM
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Well, im moving and deciding to sell my FV15HP so it doesn't sit in storage for a year or longer. Sad to see it go but will be able to pick up a FV18HP down the road when I have a space again.
i'll hold on to it for you...

jbl l100t3 (x2), rythmik fv15hp (x2), phase linear 700b, samsung ln52b750, sony str-db930
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i'll hold on to it for you...
I bet you would haha
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post #28301 of 28303 Unread Today, 12:31 PM
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Originally Posted by trp3383 View Post
Ran some more sweeps, this time with mv at 0 and no deq. Also attempted subwoofer distance tweak. If I plan on listening at -15 to -20 can I just bump the trim on the sub 18db? It's at -10.5

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I would start by setting subs +9dB (-1.5dB trim) and see how you like it. But yes, if don't plan on listening past -15 MV you can boost the subs +15dB safely.

The readings you are getting with dual L22s is impressive! They really are just as good as F15s!

That dip at 70Hz is slightly troublesome. If you have capable mains you can try lowering the x-over to 70Hz or 60Hz. Do you have space to add a 14" square MBM behind or beside the MLP? Otherwise, I wouldn't worry about.
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post #28302 of 28303 Unread Today, 12:38 PM
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Originally Posted by Marc Alexander View Post
I would start by setting subs +9dB (-1.5dB trim) and see how you like it. But yes, if don't plan on listening past -15 MV you can boost the subs +15dB safely.

The readings you are getting with dual L22s is impressive! They really are just as good as F15s!

That dip at 70Hz is slightly troublesome. If you have capable mains you can try lowering the x-over to 70Hz or 60Hz. Do you have space to add a 14" square MBM behind or beside the MLP? Otherwise, I wouldn't worry about.
I only have about 6in between the couch and wall. I'll just deal with that dip at 70hz until I build my theatre room..... maybe 1 day. I thought the bass was lacking after running xt32 but that was because I was missing 15-20db of reference bass.

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post #28303 of 28303 Unread Today, 01:17 PM
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I have a dip at ~50hz according to my last set of measurements. I can see it on graphs, but my ears can't hear it.

Display - LG OLED
Receiver - Denon
Speakers - Klipsch
Subs - Rythmik
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f12g subwoofer , lv12r , Rythmik , Rythmik Audio , Rythmik Audio F12 Direct Servo Subwoofer , Rythmik Audio F15 Subwoofer , servo sub



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