[kmmd]

I just installed a system into my e92 and would suggest looking into the Gladen speakers as well. I agree that that the Focal is also a good choice. I haven't heard the Jehnert's or Rockford's to be honest.

I had Simplicity in Sound in Milpitas install the Gladen HG-201BMW 3-ohm 8-inch underseats, and I have been very impressed. While I agree that the enclosure is small, the output can be unbelievable. I have the two underseat speakers powered by 2 channels of a Mosconi AS200.4 which puts out 200 watts into 4 ohms, and I have incredible output. My subwoofer, Focal P25F, is crossed over at 63Hz through my Aerospace 6 to 8. I can get away with keeping my sub output at 10% on some tracks but no more than 50% on all.

As for the rest of my system...Mosconi AS100.2 for Aerospace 20's, other two channels of 200.4 into Aerospace 80's (both 20's and 80's in A-pillars) and bridged AS200.2 into Focal sub.