0 Members and 1 Guest are viewing this topic. Read 4577 times.
I'm using a pair of Rythmik 12SE with my 3.7i. Very fast servo subs
You should try them with the OB servo subs that Rythmik makes. I've heard just about every sub (and type of sub) as well as built a few myself. Trust me, NOTHING can touch the Rythmik OB servo subs, especially when pairing to Planars.
Nonsense. You haven't listened to nearly enough OB subwoofers. These type of OB/dipole woofer designs actually date back many decades. Even well back before Linkwitz has made them more popular recently.The more current generation (last twenty years or so) long-throw, low-distortion drivers have improved the performance relative to older types.But to think that a particular current manufacturer is well out-performing everything else is just delusional. Dave.
I didn't believe it either, until I heard it. The servo OB gives you the speed/musicality that any good OB setup gives you. Where it excels any other OB system I've heard is in punch and slam. It rivals the best box bass in punch/slam and that's pretty darn rare. I've heard the Linkwitz OB speakers several times (3 of them being set up by Linkwitz himself), and the OB servo subs leave it in the dust.
That's just silly rhetoric.Much less of the fanboy cheerleading and much more objective commentary would be preferable.
Servo simulates a low Q system, which has good transient response, sounds like more bass detail, less smear, less "warm." It uses high Q driver (weak suspension and usually weak motor too) to allow easier cone excursion, requiring less amplifier power to damp it electrically. Low power amp and high Q driver keep the system cost down. Servo feedback allows the amp to damp the cone motion electrically, taking out the slop of the high Q driver, making a low Q system (with better transient response, sounds more detailed.) Similar result can be achieved using a low Q (self damping) driver with strong motor and strong suspension that can control itself without servo feedback. Then apply powerful amplifier because low Q subwoofer drivers are usually low sensitivity, and apply bass boost EQ (because the dipole cancellation and baffle step diffraction always present in OB are not compensated by the exaggerated cone movement of high Q driver.) You get the good transient response without servo control because the cone is naturally well damped by the suspension and doesn't need feedback correction. Same result, much different price. I would think the low Q driver path has the potential to deliver even better results than servo systems, if lower impedance amp and better damped drivers were used. This means more power amps and more power handling voice coils which means much more money! Any commercial servo system is limited in performance by the power of the amplifier and the driver motor, which are by design, less expensive in order to maximize the main benefit of servo system: good transient response at lower cost than non servo methods of achieving god transient response. All servo does is increase electrical damping, so, technically, a servo controlled system can do anything a non servo system can do, but nobody makes a servo system with the world's best amplifiers and low Q drivers because it would be too expensive. Which is why so few people make OB systems with low Q drivers. Both of these low Q methods will sound much better than typical passive OB using high Q drivers with weak suspension and weak motors that are necessary to allow loud and low extension at the cost of transient response, ala Eminence Alpha 15, AE Dipole series, or any other high Q speakers. No cone control, no bass detail. Neither the suspension, nor the amplifier can control the cone, so it is allowed to exaggerate the incoming signal from the amp, which lets it over extend to play louder and lower than low Q driver with no electronic boost. Passive OB experimenters get low bass on the cheap, but they will not be satisfied for long with the lack of tonal texture because without damping, it's just a weight on a spring and all it can play is sine waves.
