These are something of a completely new concept to me. The idea of having such a wide frequency range without the requirement of crossovers. (No losses!) Everything depends on the actual performance. These are TRIPLE coned! (not twin). I have a couple of very old wedge monitors, very small internal volume. These have been refurbished and I decided to try these wideband drivers. My hearing is good to 17.5kHz, so will these be ok without an HF driver? Well, the wedges don't have one and the sound is the best ever, solid and punchy, nice and flat response, not exactly sub-bass at 12 inch in such small enclosures, but there's nothing seriously missing for monitors. Thoroughly recommended !