Boston Acoustic gave me the specs for my bookshelf speakers. ie 89 dB/watt/meter frequency response, etc. I measured the opening and this one is all but indistinguishable from the other. IN fact I am tempted to purchase a second because I am so well satisfied. Boston Acoustics and Polk Audio were terrific on the phone and it was a change from robophone!
Reviewed by: Michael from Simsbury Ct.
Purchased this speaker to replace a busted Boston Acoustic computer sub woofer. It fits perfectly and sounds great.