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Go Back   Blu-ray Forum > Audio > Subwoofers


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Old 10-29-2015, 03:28 PM   #121
3db 3db is offline
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Nov 2014
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Rythmik offers a sealed version of their entry level LV12-R called the L12.

http://www.rythmikaudio.com/L12_specs.html
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Old 01-13-2016, 04:53 PM   #122
3db 3db is offline
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Default Some updates;

Rythmik offers two more subs based on the same driver found on the LV12-R

A sealed sub with one driver: (L12) for $569.00
http://www.rythmikaudio.com/L12_specs.html

A sealed sub with two drivers (L22) for $899.00
http://www.rythmikaudio.com/L22_specs.html


A review on the sealed dual 8" sub called the F8;
http://www.hometheatershack.com/foru...f8-review.html

Rythmik will be prototyping their first 18 inch sub in a ported configuration sometime in February with production targeted for the summer. I can't wait to see how this beast will perform given Rythmik's pedigree.
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Old 01-13-2016, 04:56 PM   #123
elwaylite elwaylite is offline
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Awesome. Love my duals.
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Old 03-04-2016, 10:28 PM   #124
Integra8 Integra8 is offline
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Had an issue with my system. My Integra died (the HDMI board thing) and I went and bought a new receiver, an Onkyo 646. I thought I damaged my sub with the new receiver. The Onkyo 646 sent out an ungodly LFE thump that was LOUD! Anyway returned the Onkyo ( the sub out was bad according to Onkyo) and got a Denon. No bass..called and emailed Brian and Enrico at Rythmik and even though my sub is out of warranty they were there for me, and got my sub working again! Excellent Customer service!!!

Jeff
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Old 03-05-2016, 02:09 PM   #125
elwaylite elwaylite is offline
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Quote:
Originally Posted by Integra8 View Post
Had an issue with my system. My Integra died (the HDMI board thing) and I went and bought a new receiver, an Onkyo 646. I thought I damaged my sub with the new receiver. The Onkyo 646 sent out an ungodly LFE thump that was LOUD! Anyway returned the Onkyo ( the sub out was bad according to Onkyo) and got a Denon. No bass..called and emailed Brian and Enrico at Rythmik and even though my sub is out of warranty they were there for me, and got my sub working again! Excellent Customer service!!!

Jeff
great to know!
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Old 01-14-2017, 10:09 PM   #126
chane chane is offline
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Jul 2010
Default Are Dipole & Monopole Servo Subs Compatible?

In my 14 ft x 19 room I have a cloned pair of Gary Dahl’s two-way mains: Aurzahorns/Radian 745 Neo/Be drivers atop sealed GPA Altec 416-8B midwoofers. http://i190.photobucket.com/albums/z...pse3b0ffd5.jpg

The Altecs go down to 70Hz, below which my pair of Rythmik 12" sealed servo subs take over. http://www.rythmikaudio.com/F12.html However, studies done by Todd Welti show conclusively that using 3 to 4 subs even in small rooms will better quell room modes and thereby yield much smoother bass response throughout much of the listening area. See Figs 47 thru 53 bare out the results, and especially Figs. 40 and 41. https://www.harman.com/sites/default...s/multsubs.pdf

There’s also a large thread on the subject where Earl Geddes discusses his slightly different approach to multi-sub solutions for achieving much the same goals. http://www.whatsbestforum.com/showth...ofer-Placement

Based on Welti’s conclusions to reduce room modes, I was then going to order the second pair of Rythmik 12" sealed subs for above system. Both pairs of subs can be daisy chained as all subs would have the Rythmik A370-XLR2 plate amp. http://www.rythmikaudio.com/download...quickguide.pdf

However, I also want to install another system in the same room placed along the short wall opposite my other system. The mains for that system would be a pair of ESLs, probably Quad 57s.
http://dave-mills.yolasite.com/resou...omprimiert.jpg

However, even raising the Quads 15 to 20” (on Arcaci stands) and placed six feet from the rear wall, the Quads will only do down to 45Hz, ergo subs for that at last lower octave. But as ESLs, like open baffle speakers, are dipoles, I presume that a pair of dipole rather than sealed subs would sound best for the Quads. And I found a thread about Danny Richie’s dual 12” woofers in OB cabinets servo controlled by Brian Ding’s Rythmik plate amps fitted with a shelving filter. http://www.rythmikaudio.com/GRci_OB.html http://www.rythmikaudio.com/GR_drivers.html

These dipole servo subs appear to be in use by one Quad 57 owner. http://www.audiocircle.com/index.php?topic=139335.0

Questions:

1.) Even if with two pairs of subs, would my two way hybrid horn/sealed Altec midwoofer (monopole) speakers prefer all Rythmik 12" servo sealed box subs? Or would they sound equally fine if one pair were dual 12” Rythmik servo dipole subs?

And would the pair of dipole subs and pair of sealed box subs still reduce room modes as effectively as would two pairs of sealed box subs?

2.) Even if with two pairs of subs, would the Quad ESL (dipole) speakers prefer all dual 12” Rythmik servo dipole subs? Or would they sound equally fine if one pair were Rythmik 12" servo sealed box subs?

And would the sealed pair and the dipole pair of subs still reduce room modes as effectively as would two pairs of dipole subs?

3.) Assuming the answer to all the above is yes, there’s the matter of setting the crossover frequency for both pairs of subs, when using either pair of mains.

My Altec midwoofers play down to 70Hz. And the Quads, if placed 6 ft or so from the rear wall-and if raised 14 to 20” on (Arcaci) stands-should do down to between 45 and 40Hz.

Accordingly, I would initially set the sealed subs and the dipole subs plate amps to cross and be in phase with the Altec midwoofers and Quad ESLs, respectively, and confirm that each pair of subs works nicely with alone with its own mains. I would need to note these settings for each subwoofer pair to supply bass to its own mains, as the Rythmik plate amps have no memory for storing multiple groups of subwoofer settings.

Next, when using the pair of monopole mains I would then have to readjust the dipole subs to properly cross with and be in phase with mains.

Alternately, when using the pair of dipole mains I would then have to readjust the monopole subs to properly cross with and be in phase with those mains.

Now the question is, whether I use the pair of monopole or pair of dipole mains, regardless of well would you expect these two pair of daisy-chained dipole and monopole servo subs to sound together when both pairs (properly crossed and phase adjusted) are supplying bass for either pair mains?

And at the same time, regardless of which mains I’m playing, will a pair of dual 12” Rythmik servo controlled dipole subs work well with my pair of Rythmik 12" servo sealed subs to minimize room modes?

Last but not least, while deciding which part of which forum to place my post I found some unexpected controversy on the very notion of open baffle subs. A “stupid idea”?
http://www.diyaudio.com/forums/subwo...-design-4.html I’m probably not expert enough to even enter into a debate on this. However, in order to avoid making a bad investment and/or overcomplicating my subwoofer scheme, I am reaching out for experienced and impartial feedback on dipole subs, dual 12" Rythmik servo dipole subs in particular and using them simultaneously with Rythmik 12" sealed servo subs. Thank you.

Last edited by chane; 01-14-2017 at 11:40 PM.
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Old 10-26-2017, 06:51 PM   #127
3db 3db is offline
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The new F18 tested by Data-bass

http://www.data-bass.com/data?page=system&id=145


and FV18 tested by JMan... review linked here.


http://www.hometheatershack.com/for....er-review.html
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Thanks given by:
KMFDMvsEnya (10-29-2017), theJman (10-26-2017)
Old 10-26-2017, 10:26 PM   #128
theJman theJman is offline
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Josh and I both came to the same conclusion about 2 different new Rythmik subs; very nice additions to their lineup.
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Old 10-27-2017, 07:03 PM   #129
3db 3db is offline
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Quote:
Originally Posted by theJman View Post
Josh and I both came to the same conclusion about 2 different new Rythmik subs; very nice additions to their lineup.
I wish I had the physical space and funds to obtain one of these but I lack both. *LOL* The LV12-R is all I really need for my new place. Its still going strong
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