Does anyone play two pairs of speakers at the same time?

Man, talk about comb filtering and phase issues! Getting the drivers in one loudspeaker to "speak as one" is hard enough, why make it much, much harder by pairing two different speakers? Very bad idea. There's a kid posting on the Planar Speaker Asylum lately---he is running Maggies and Klipsch (don't recall the model of either), side-by-side and simultaneously. What a mess!

That sounds almost as bad as having two wives!

I don't seem to have any serious comb filtering or phase issues. Sounds bloody righteous

If you are not running 2 amps off of your pre,(providing the pre has multiple outputs) isn't the amp seeing potentially damaging low impedance?   

i am running all actives... i am still doing some eval on this setup... while i am losing a bit of crystal best-in-class midrange detail from running only the AirPulse Model 1 , the heft and soundstage of this arrangement cannot be denied. the JBL 305 is no slouch and as it onle goes to about 16Khz I am only feeling the love from these 200 dolla boxes... a livelier all-around sound.. i love dem horns