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!