Official Rythmik Audio Subwoofer thread - Page 663 - AVS Forum | Home Theater Discussions And Reviews
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post #19861 of 19879 Old 07-21-2015, 03:50 PM
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Quote:
Originally Posted by Bill Mac View Post
The odd part about this is that there is no noise from the toroidal transformers in my XMC-1 and Oppo 105D. I tend to agree that it isn't a ground loop as when I shut off the plasma or use the Pure Audio mode (black screen) with the 105D the hum is silenced.

Bill
Just from my reading when I researched the issue, the larger the toroidal the louder it is. To be honest I can barely hear my FV15HP's but I listened closely to see if they had the same issue since I knew the CMX2 would fix it. The Outlaw 7125 I had was barely noticeable, but the 7500 is LOUD. Could be the 105D toroidal is not large enough to cause a lot of racket. I basically put everything I had with a toroidal in it on the CMX2's. Other than the noise I think it can decrease lifespan of the transformer, but how badly I have no idea, figured it was better to get them on clean power.
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post #19862 of 19879 Old 07-21-2015, 03:53 PM
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I have a Samsung Plasma and 2 Rythmik F12s, one on the front wall and one on the back wall. I don't think I'm getting any hum. How loud is this for you guys? Would I have to put my ear to the driver to hear it?
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post #19863 of 19879 Old 07-21-2015, 05:28 PM
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Originally Posted by Soulburner View Post
I have a Samsung Plasma and 2 Rythmik F12s, one on the front wall and one on the back wall. I don't think I'm getting any hum. How loud is this for you guys? Would I have to put my ear to the driver to hear it?
Just make the room quiet, pause the plasma on a very bright screen (snow for example)with the sub on, and put you ear near the back where the amp is. The transformer on the amp will be noise if you have the issue.

I have owned many plasmas, the VT50 is the only one I ever had that caused this, but, I never had nice gear with toroidal transformers before that either LOL.
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post #19864 of 19879 Old 07-21-2015, 05:47 PM
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Originally Posted by gadgtfreek View Post
Everyone told me that until I proved it was the plasma. He used a cheater plug IIRC which should have ruled out ground loop. Plasma injecting DC into the line is not uncommon I just think it goes unnoticed because most arent using amps with big torroidal's and Rythmik's are a rare sub with transformers like that.
Missed that he had tried a cheater plug, sorry. Never mind.

Not sure why a plasma would cause DC; noise, yes, and harmonics on the line, but not sure why the DC. But, I am no expert on the power supplies of plasmas.

"After silence, that which best expresses the inexpressible, is music" - Aldous Huxley
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post #19865 of 19879 Old 07-22-2015, 05:28 AM
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Originally Posted by DonH50 View Post
Missed that he had tried a cheater plug, sorry. Never mind.

Not sure why a plasma would cause DC; noise, yes, and harmonics on the line, but not sure why the DC. But, I am no expert on the power supplies of plasmas.
You got me. I did the tests after reading up on some articles about plasma and the issue, and then that led me to the CMX2 which was designed to combat something I never heard of. Definitely a "WTF" moment for me
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post #19866 of 19879 Old 07-22-2015, 05:29 AM
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Answered a page or three ago. Differences in size and features. A lot of folk want a smaller (yet capable) sub. The marketplace will tell, but to date the impetus has been to increase the breadth in the line, especially at the lower end.

Size difference between the two models are not that substantial. However, the 250 Hz crossover aspect of the F8 maybe enough to differentiate it from the L22.
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post #19867 of 19879 Old 07-22-2015, 10:08 AM
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Size difference between the two models are not that substantial. However, the 250 Hz crossover aspect of the F8 maybe enough to differentiate it from the L22.

L22 can also be a very nice fill-in subwoofer. I have just recommended an E15/L22 combo with E15 in the front and L22 in the back. The customer previously use two Epik 12" ported sub. All of our sealed subs have closely matched roll-off chacteristic. In this case, the phase difference between E15 and L22 below 30hz is no more than 45degrees even with rumble filter turn on. This is just one example. Customer can use other combinations, F12/L12, F15HP/L22..etc and save money.
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post #19868 of 19879 Old 07-22-2015, 11:47 AM
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Originally Posted by Rythmik View Post
Yes. That is LVX12 with multi-tune feature. The design is complete and they should be in next shipment.
Good to know. I'll watch the website for pricing in... August?
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post #19869 of 19879 Old 07-22-2015, 11:49 AM
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Originally Posted by Rythmik View Post
L22 can also be a very nice fill-in subwoofer. I have just recommended an E15/L22 combo with E15 in the front and L22 in the back. The customer previously use two Epik 12" ported sub. All of our sealed subs have closely matched roll-off chacteristic. In this case, the phase difference between E15 and L22 below 30hz is no more than 45degrees even with rumble filter turn on. This is just one example. Customer can use other combinations, F12/L12, F15HP/L22..etc and save money.
I own the LV12-R and am very happy with its performance. It still elicits a sh?t eating grin when my wife complains about earthquakes or runs down into the HT room wondering what the deep throbbing booming is all about. It fits my room perfectly. I also find it tight enough to use with music. That being said, how does the LV12-R compare in output, extension, and tightness/bass articulation to the L22? I'm simply curious.

Last edited by 3db; 07-22-2015 at 12:29 PM.
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post #19870 of 19879 Old 07-22-2015, 11:32 PM
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Quote:
Originally Posted by Rythmik View Post
L22 can also be a very nice fill-in subwoofer. I have just recommended an E15/L22 combo with E15 in the front and L22 in the back. The customer previously use two Epik 12" ported sub. All of our sealed subs have closely matched roll-off chacteristic. In this case, the phase difference between E15 and L22 below 30hz is no more than 45degrees even with rumble filter turn on. This is just one example. Customer can use other combinations, F12/L12, F15HP/L22..etc and save money.
How do one integrate an L22/F8 with FV15HP? Is this allowed (sealed + ported)?
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post #19871 of 19879 Old 07-23-2015, 05:52 AM
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Originally Posted by Skylinestar View Post
How do one integrate an L22/F8 with FV15HP? Is this allowed (sealed + ported)?
Ah man look what you did now you got me thinking. I'm picturing my FV15HP's up front and the L22 laying on it's side firing right into the back of the MLP.

Receiver - Denon 4311CI
Speakers - Klipsch RF-82 II's, RC-62 II, RB-61 II's
Subs - Rythmik FV15HP's
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post #19872 of 19879 Old 07-23-2015, 06:49 AM
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The roll-off and phase response are much further apart between sealed and ported designs so integration is more challenging. Not impossible, just takes more care (and perhaps more DSP), and harder to match below the port frequency. How much that matters is up to you.

"After silence, that which best expresses the inexpressible, is music" - Aldous Huxley
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post #19873 of 19879 Old 07-23-2015, 06:25 PM
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Quote:
Originally Posted by 3db View Post
I own the LV12-R and am very happy with its performance. It still elicits a sh?t eating grin when my wife complains about earthquakes or runs down into the HT room wondering what the deep throbbing booming is all about. It fits my room perfectly. I also find it tight enough to use with music. That being said, how does the LV12-R compare in output, extension, and tightness/bass articulation to the L22? I'm simply curious.
L22 has a bit more output than LV12-R. As a sealed sub, it has a bit better extension. L22 is also more expensive than LV12R.

Quote:
Originally Posted by Skylinestar View Post
How do one integrate an L22/F8 with FV15HP? Is this allowed (sealed + ported)?
For F8, I would recommend the midbass module option FM8 and crossover both FV15HP and FM8 at 50hz. I don't recommend run F8 and FV15HP with overlap.
L22 can work with FV15HP. However, rumble filter on L22 has to be on so that the phase difference between L22 and FV15HP 1 port mode is minimal. It is best for room with significant low end room gain such that one FV15HP, before running room EQ, has a rising response below 20hz.
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post #19874 of 19879 Old 07-23-2015, 06:43 PM
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It looks like the new batch of L12s are shipping

Life is Lambertian
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post #19875 of 19879 Old 07-23-2015, 07:23 PM
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It looks like the new batch of L12s are shipping
Yes, that's correct. The container came in this morning full of subwoofers
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post #19876 of 19879 Old 07-24-2015, 04:43 AM
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Just got my L22's. When I bought these subs I had a specific size requirement. They are going in columns in a large wall unit.
The room is 20x25 with 20 foot ceilings and opens to the kitchen and a open balcony on the second floor.
I didn't expect a pair of L22's to fill a room that size. I have played a lot of music with them and the bass is
way more than I expected, for music they are incredible. I have not had the opportunity to listen to the subs
on a blu ray movie yet. When I do I expect them to be very impressive.
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post #19877 of 19879 Old 07-24-2015, 04:58 AM
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Originally Posted by dadz41 View Post
Just got my L22's. When I bought these subs I had a specific size requirement. They are going in columns in a large wall unit.
The room is 20x25 with 20 foot ceilings and opens to the kitchen and a open balcony on the second floor.
I didn't expect a pair of L22's to fill a room that size. I have played a lot of music with them and the bass is
way more than I expected, for music they are incredible. I have not had the opportunity to listen to the subs
on a blu ray movie yet. When I do I expect them to be very impressive.
Sweet! Any pics??

Sony VPL-HW40ES Projector on 92" Elite Screen
Sherbourn SR-8100 Receiver
Ascend Acoustics CMT-340 SE LCR
Ascend Acoustics CBM-170 SE Surrounds, no room for rears :(
Rythmik FV-12 (original with front port) sub, soon to be replaced with RA Gamma 18 :)
<1300cf dedicated theater room (re-purposed den) with a couple Acoustimac panels.
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post #19878 of 19879 Unread Today, 01:24 PM
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Do I need to post in this thread twice when I get my second FV15HP? It'll be here Thursday 😈

Sent from my SM-N910V using Tapatalk
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post #19879 of 19879 Unread Today, 02:36 PM
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Yes, pix or it didn't happen.
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f12g subwoofer , Rythmik , Rythmik Audio , Rythmik Audio F12 Direct Servo Subwoofer , Rythmik Audio F15 Subwoofer , servo sub

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