Rythmik L12 or F12

Rythmiks are gaining a reputation amongst planar speaker owners, particularly Maggies. Most subs are designed for home theater, but Rythmik owner/designer Brian Ding is concerned first with music reproduction. The co-designer of the paper-coned woofer in the F12G, Danny Richie of GR Research, is a hard-core audiophile---OB woofers and speakers, tube amps, perfectionist sensibilities, worked closely with tube amp maker Gary Dodd (R.I.P.). Danny & Brians OB/Dipole Subwoofer is, as preciously stated, State-Of-The-Art. But it is available as a DIY kit only, the user needing to build or have built the OB/Dipole H-frame into which the dual 12" woofers (the free-air version of the woofer in the Rythmik F12G) are installed.

Does Rythmik F12 generate hot when running or it is cold?

You can’t go wrong with a Rythmik sub.

FWIW, I’ve been using an L12 for a few years. A single one in a relatively small environment and I’m quite happy with it. It’s a quality sound used here principally for classical music and some pop, not theater.

IIRC the output spec in db was very close to that of the F12. A major difference is that the L12 cannot be connected to the speaker; it MUST be fed from a preamp with RCA connects.

I think the owner of Rythmik, who is a real audiophile, will get on the phone with you and discuss the differences in an honest way.

On the Rythmik website, there's also something called the F12-300.
It seems this sub has a less powerful amp with fewer tuning options, but it says nothing about the driver.  The photo looks like the same driver as the F12.  I wonder if it is?