Is Magnepan is coming out with it's own amplifier

Richard, I forgot to include the info that the B4 filters can be set to 1st, 2nd, 3rd, or 4th-order, which is of course 6, 12, 18, or 24dB/octave. Much more flexible than the Bryston x/o, which is regularly recommended and used with Maggies. The there are the x/o's from Marchand, who make custom boards to provide any x/o frequency and slope you desire. And, some of the Marchands are tubed!

Richard, unless you absolutely MUST have a tube x/o, the little First Watt B4 is perfect for use with Tympanis (I bought one for use with my T-IVa's). It is no longer available factory built, but only as a DIY kit. Completely discrete (no opamps or IC's), high-pass and low pass filters in 25Hz increments from 25Hz to 6375Hz, a level control for either the high or low pass (user selectable).

Yeah, that Forum can be viewed two different ways. One is pretty straightforward (choose "Classic" view), the other (something to the effect of "Show all info') a real mess. 

Sort of. It is an amp made for them, which they will market and distribute for use with their loudspeakers. The amp has been discussed on the Planar Speaker Asylum site, info provided by amongst others a great fella and contributor named Josh, Wendell Diller's middleman to audiophiles.