HAVING READ PREVIOUS REVIEWS, I AGREE WITH ALL EXCEPT THE COMMENTS ABOUT BASS RESPONSE,I DRIVE THESE 500LS WITH A PROCEED AMP2, THE BASS RESPONSE IS EXCELLENT, WITH ROOM SHAKING, TIGHT BASS. I USE THESE FOR MUSIC (THEATRE ORGAN REPODUCTION IS EXCELLENT WITH AS-YOU-WERE-THERE BASS) AND IN A HOME THEATRE WITH BOTH A SET OF 500LS & 400LS FOR THE LEFT AND RIGHT FRONT, WITH THE 400LS DRIVEN BY A MAC AMP., I USE A SET OF LYNNFIELD 300LS FOR THE REAR CHANNELS AND 2 BOSTON CENTER CHANNELS DRIVEN BY A 3X200 ACURUS AMP. THE PREAMP IS A MX130 MAC.
IF ANYONE LACKS A SERIOUS BASS RESPONS FROM THESE BOSTONS, I WOULD LOOK AT THE POWER AMP/PREAMP COMBINATION FIRST. ALL IN ALL, I HAVE NOT HEARD A BETTER SOUNDING SPEAKER AT ANY PRICE TO DATE.

I HAVE FOUND NONE TO DATE

AT OIGINAL RETAIL PRICE, THESE WOULD BE A BARGAIN TODAY.
I USE A SUBWOOFER FOR DOLBY 5.1 MATERIAL, BUT TURN OFF THE SUBWOOFER FOR MUSIC.