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
BLUE METALLIC POLY-INJECTION CONE; FOAM SURROUND; HIGH TEMPERATURE KAPTON VOICE COIL; CHROME-PLATED BINDING POSTS; 60-OZ MAGNET; IMP: 4 OHM; 8; 250W MAX; VOICE COIL DIAMETER & TYPE: 1 ALUMINUM; EFFICIENCY 1W/1M @ 90 DB; FREQ RESP: 40 HZ 3 KHZ; MOUNTING DEPTH: 3.44
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