The following is excerpted from the information available.
The Renaissance-3 is not intended to reproduce th lower two octaves, instead they are used with your choice of a subwoofer system. Sound Lab will be producing their own optional subwoofer system, the Renaissance-4, that is designed to provide a good balance between fast, articulate bass characteristics and heavy, less defined characteristics. The R-4 mounts to the lower back of the R-3 in the same location as the free-standing base and projects the bass energy through the acoustically open space in the lower part of the R-3 panel.
Audio power (min./max.) is specified as 50/400 watts (music rated power), radiating area is 700 sq.in., horizontal dispersion is 90 degrees (full spectrum), impedance is 4 to 8 ohms depending on selected gain, and maximum sensitivity is 90 dB/1 w/1 m. 67 1/2"H x 20"W x 7" array (21" deep at base), 78 lbs. weight. Controls include gain (4 positions in 3 dB steps), low frequency cutoff (4 positions: 80, 100, 150 and 200 Hz), brilliance (continually adjustable), and bias (continually adjustable).
I look forward to auditioning them under better conditions and with the R-4 subwoofers. In any event I hope the above is useful and will be happy to provide any other information you may want. I should add I'm a Sound Lab dealer (located in the Chicago area).
Brian Walsh
Essential Audio