ULF Bass is the most difficult to reproduce accurately. 99% of what is available is reflex extended resonant bass - B&W, Wilson, JM Labs and all the major audiophile brands do it. Most boutique brands do it too. You can easily identify this by the hump in the bass on a frequency plot and the one note bass sound of 99% of speakers.
Clean bass needs a Q of 0.7 or less and two 15 inch woofers in most domestic settings. (4 x 12" woofers will be equivalently capable.) I rarely see this kind of setup on Audiogon so I don’t think many people are even aware of the issues raised by Erik.
Sticking a good subwoofer with 99% of these reflex extended speakers is just not going to be able to correct the one note resonance. Hardly anyone builds speakers without the characteristic one note bass resonance as a low Q box sounds anemic in bass especially at low volumes and is therefire unlikely to sell in shop floor demos against competitors.
Clean bass needs a Q of 0.7 or less and two 15 inch woofers in most domestic settings. (4 x 12" woofers will be equivalently capable.) I rarely see this kind of setup on Audiogon so I don’t think many people are even aware of the issues raised by Erik.
Sticking a good subwoofer with 99% of these reflex extended speakers is just not going to be able to correct the one note resonance. Hardly anyone builds speakers without the characteristic one note bass resonance as a low Q box sounds anemic in bass especially at low volumes and is therefire unlikely to sell in shop floor demos against competitors.