Features (HL6571):
1) Subwoofer
2) P.P injection cone rubber edge
3) Freq. response: 50Hz-4000Hz
4) Max. power: 200W
5) Voice coil (AL): 1"
6) Magnet: 20oz x 2
7) SPL: 93dB/W/M
8) Impedance: 4/8Ω

Features (HL8071):
1) 8" subwoofer
2) P.P injection cone rubber edge
3) Freq. response: 40Hz-4000Hz
4) Max. power: 300W
5) Voice coil (AL): 1"
6) Magnet: 30oz x 2
7) SPL: 93dB/W/M
8) Impedance: 4/8Ω

Features (HL1071):
1) 10" subwoofer
2) P.P injection cone rubber edge
3) Freq. response: 35Hz-3000Hz
4) Max. power: 400W
5) Voice coil (AL): 1.5"
6) Magnet: 40oz x 2
7) SPL: 95dB/W/M
8) Impedance: 4/8Ω

Features (HL271):
1) 12" subwoofer
2) P.P injection cone rubber edge
3) Freq. response: 30Hz-2500Hz
4) Max. power: 500W
5) Voice coil (AL): 2"
6) Magnet: 50oz x 2
7) SPL: 95dB/W/M
8) Impedance: 4/8Ω