another nice choice; slightly less output, "only down to 19hz instead of 17hz, but still really good, especially for the price. this pair has updated drivers. sf bay area:
Vintage VMPS Brian Cheney large subwoofer
specs for original:
Rec. xover range: - 60 Hz - 300 Hz
Internal wiring: - 12 gauge Monster Cable
Impedance & Sensitivity: - 8 Ohm, 90 dB/1W/1m
Power handling: - 300 W rms / 4 Ohms, 20 W min.
Frequency response: - 19 Hz - 600 Hz +0/-3 dB
Output levels and distortion: - max. 2.5%THD fullrange / 1 W, max. 112+ dB SPL/1m
specs for larger:
Drivers: - 38cm (15") WCF Megawoofer, 30cm (12") WCF Megawoofer, 38cm (15") Passive Radiator
Rec. xover range: - 60 Hz - 250 Hz
Internal wiring: - 12 gauge Monster Cable
Impedance & Sensitivity: - 4 Ohm, 92 dB/1W/1m (older upright iteration - 95db/1w/1m)
Power handling: - 600 W rms / 4 Ohms, 20 W min.
Frequency response: - 17 Hz - 250 Hz +0/-3dB
Dimensions & Weight: - 58Hx81Wx 48D cm, 63 kg, (23"Hx32"Wx19"D, 138 lbs) (older uprights - 18"Dx26"Wx39"H)
Output levels and distortion: - max. 0.5% 20 Hz to 250 Hz / 1 W, min. 115 dB SPL / 1m at 20 Hz & 2.5%THD
doug s.