Planar Speaker Asylum

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Planar Speaker Asylum

RE: In no way am I recommending...

69.180.66.136

In Reply to: RE: In no way am I recommending... posted by BigguyinATL on October 04, 2016 at 12:02:54

I think you nailed it, that's kind of where I was at. When I can afford a 2nd sub that is the equal to the one I have I will pull the trigger. I have other priorities at this time..... as someone said 'it's all relative'.

Follow Ups:

RE: In no way am I recommending... - BDP24 16:59:53 10/05/16 (7)
Brian Ding of Rythmik (and many others) have explained why a larger woofer cone being automatically "slower" than a smaller one by reason of it's diameter is a myth. Brian (and his partner Danny Richie at GR Research) offer 8", 12" and 15" woofers in various model subs. The difference between the models is in the nature of maximum SPL at a given distortion level, and the lowest frequencies possible to reach at a given SPL, not their "speed". The "speed" (actually a misnomer---Rythmik subs just sound fast! Their clean sound is achieved by means of the Direct Servo Feedback control of their excellent woofers) of the Rythmik subs is audible in all three sized woofer models. Brian is currently finalizing the design of a ported sub with an 18" woofer, slated to be introduced later in the year. Though ported and using an 18" woofer, it too should sound as "fast" as the other Rythmiks.
The Rythmik Direct Servo Feedback controls not only the starting and stopping of the woofer's cone (the electrical nature and motors---magnets---of all cone drivers is responsible for that), but also takes into consideration the temperature of the driver's voice coil as it heats up with use. That temperature affects the electrical characteristics of the woofer, and is constantly changing. The DRF also interacts with the woofer in other ways (you can read Mr. Ding's Patent application for specifics if you wish) to keep it's output linear. Rythmiks are not the only good subs out there, but the OP asked specifically about opinions on Rythmik, and that's what I'm giving him!

Edits: 10/05/16
- RE: In no way am I recommending... - gadio4533 18:38:47 10/05/16 (6)
  Great info, much appreciated.
  - RE: In no way am I recommending... - BDP24 03:57:49 10/06/16 (5)
    There is much more technical material available to read on the Rythmik Audio site, some of it way over my head. Not all of us have PH.D's in electrical engineering, Brian! ;-)
    
    Edits: 10/06/16
    - RE: In no way am I recommending... - Davey 07:25:05 10/06/16 (4)
      You don't need to be a PhD to build a proper servo-controlled woofer setup. I (and others) have tried to query Brian Ding regarding the specifics of the Rythmik implementations, but he was either unwilling (or unable) to elaborate regarding it. In fact, discussions regarding Rythmik got to the point of being disallowed on a couple of forums.
      
      I was left with the impression they are just simple servo-controlled setups. Those have been essentially perfected long before Brian Ding was working on them.
      
      Subwoofers are one of the easiest audio projects to do properly. There's much marketing done in the audio industry, and especially so in the subwoofer category. Watch your wallet. :)
      
      Dave.
      - RE: In no way am I recommending... - BDP24 12:05:57 10/06/16 (3)
        
        In Reply to: RE: In no way am I recommending... posted by Davey on October 06, 2016 at 07:25:05
        
        We're all free to have any impression we care to. I believe the U.S. Patent Office has stricter rules ;-). One difference between the Rythmik and other servo-feedback designs is right in the name of Mr. Ding's creation: Direct. I'm left with the impression that the direct nature of the design is a noteworthy difference, but not nearly all there is to it.
        
        RE: In no way am I recommending... - Davey 13:03:40 10/06/16 (2)
        
        In Reply to: RE: In no way am I recommending... posted by BDP24 on October 06, 2016 at 12:05:57
        
        The U.S. Patent office is a joke when it comes to this type of thing. It ceased to be about any type of technical innovation a long time ago.
        Ask Brian to explain the "Direct" implementation to you. :)
        
        Sub-woofers are easy.....that's why so many people build them. Same thing with cables.
        
        Keep your hand on your wallet and beware of the marketing.
        
        Cheers,
        
        Dave.
        
        RE: In no way am I recommending... - BDP24 16:14:53 10/08/16 (1)
        
        In Reply to: RE: In no way am I recommending... posted by Davey on October 06, 2016 at 13:03:40
        
        The "direct" aspect is the one thing I DO understand! It's only the tip of the Rythmik iceberg though.
        
        RE: In no way am I recommending... - Davey 17:00:34 10/08/16 (0)
        
        In Reply to: RE: In no way am I recommending... posted by BDP24 on October 08, 2016 at 16:14:53
        
        The "Rythmik iceberg." Classic!!
        I guess we've found the reason why these drivers are no longer available.
        http://www.parts-express.com/dayton-audio-ts400d-4-15-titanic-mk-4-subwoofer-4-ohm--295-405
        Dave.
        http://www.parts-express.com/dayton-audio-ts400d-4-15-titani (Open in New Window)
        
        Edits: 10/08/16

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