One thing I forgot to mention. Specs for loudspeakers are extremely misleading. No 10 inch driver goes flat to 30 Hz in a normal room not even 10" subwoofer drivers. The measurement was taken very near field under anechoic conditions. None of these single driver systems produce any real output below 100 Hz and Ralph is quite correct. The driver flaps at 30 Hz just the same even though it can not project that frequency in a room. This doppler distorts all other frequencies. Roll off the bass at 100 Hz and the speakers will magically get cleaner. This is the same for large one way ESLs, removing the bass increases headroom and detail to unheard of levels.
Many speakers make due with just mid bass. Our brains, tricky things that they are, extrapolate the fundamental. 40 Hz is more palpable than audible. Real bass you feel. If you do not feel anything there is no real bass. This is what makes live performances so incredible, the palpability of the music.
Big drivers beam treble which is fine as long as you sit square on with the driver at ear level. I have been living with beamy loudspeakers for decades. Ralph is right again. Whenever you see whizzer cones, run away! It does not matter how fancy the magnet looks. Whenever you see "fancy" in a driver, run away. Some of the fanciest looking drivers are the junk they sell for cars. If it looks good it must sound good? Right.