@gene3x, the ET LFT-8b features a pair of push-pull magnetic-planar drivers that operate from 180Hz to 10kHz, with no cross-over! Then a ribbon tweeter for 10k up and an 8" dynamic woofer for 180Hz down, via 1st-order filters. An outrageous bargain at $2499/pr, they need to be a minimum of 3' from the wall behind them, but at least 5' for the best results (true for all dipoles, whether planars or OB's such as the Linkwitz). They sound much different than dynamic speakers, not for everyone.