Subwoofer hunt

Rythmik allows you to audition any of their models in your system, and to return them if unsatisfied, paying only shipping. I would wager you wouldn’t return the F12---it has been found to blend seamlessly with Magneplanars, Quads, BG ribbons, OB’s, and with whatever speakers Sterling Sound Mastering in NYC has in their monitoring systems. Servo-Feedback design which left the twelve woofers in my Infinity RS-1b’s eating my pair of F15’s dust!

Good point af32. A good way to filter the very low bass from your main speakers without going through a x/o is with the simple installation of a capacitor (the value of which can be determined from the formula available all over the 'net) on the input jacks of your power amp. That creates a 1st order-6dB/octave filter below whatever frequency you choose. Your speakers will be cleaner with the 20-40Hz octave rolled off, and your amp will have more power available for them with that octave removed from it's signal. Perfectionists have been bi-amping the original Quads this way for decades.

For more output than the E15HP (and F15HP, with a slightly larger enclosure) provides via it’s single 15" driver and 600w amp, Rythmik currently also offers the F25, with twin 15" drivers each driven by it’s own 400w amp. The E15, F15, and F25 are all sealed designs. There is also the FV15HP, with a single 15 and 600w amp in a ported enclosure.

In development now and available later in the year are two new models featuring the new Rythmik 18" driver, one with a single driver the other with two, both in ported enclosures. A sub with two ported 18" woofers---can you imagine the output capability?! And with Rythmik’s famed Direct Servo-Feedback sound quality. A game changer no doubt.

But Rythmik (in conjunction with GR Research) already offers a game-changing sub---the OB/Dipole Sub. Not as much output as a "normal" sub, but with a sound quality totally unlike any normal sub, regardless of price. Two (or three) 12" woofers mounted in an Open Baffle H-frame and operated in dipole fashion. This sub redefines the term "stops on a dime". THE sub for any planar loudspeaker (ESL. magnetic-planar, ribbon), or other high-resolution design. Absolutely without a trace of overhang/overshoot/resonance, and exciting fewer room modes (the front-to-back but not side-to-side room dimension), a major contributor to the "room boom" often experienced when a sub or two are added to a high-performance system. The only OB/Dipole Servo-Feedback Subwoofer in the world!