This is a nice quality Aiwa TS-W35U Subwoofer. It features an impedance of 8 ohms.
Frequency response 25Hz-250kHz . Reversible top gasket. Large copper-wound Kapton voice coil. Auto tension push terminals. Flat Conex spider with loop stitched tinsel leads
For extra low-frequency extension and enhancement, the dual 12 inch powered KSub is perfectly matched to the rest of the K Series. The K8, K10 and K12 all have a selectable high-pass filter for use with the subwoofer. The KSub includes a fixed low-pass filter so it will accept full-range input. Constructed of premium birch, the QSC KSub includes high-quality, low-noise casters and a threaded...
Orion Cobalt Series 10 Inch 400-Watt Subwoofer - ORN CO104SFEATURES: Frequency response 39Hz-250kHz Reversible top gasket Large copper-wound Kapton voice coil Autotension push terminals Flat Conex spider with loop stitched tinsel leads Orion Cobalt Series 10 Inch 400-Watt Subwoofer - ORN CO104S