speakers with active bass


what do you think about speakers with active bass module ?
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ciriousjim
I have Bryson4sq amp/pre and a Bit 20.  Everything is plugged into Furutec rec's and four ded circuits.   All in all, it's OK, until I listen to a $400K setup that features a lot of Vandersteen equipment.
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Jim Salk not only builds powered subs into his higher-priced loudspeaker models, he does so with the Rythmik Servo-Feedback sub!
I have been listening to Evolution Acoustics mm2.  I was chasing bass for my large room for years until I got them. Never could integrate added subs