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50A-Series 
| JA-6250A | JA-4250A | JA-5250A | JA-6950A | |
| 6.5"2-way rubber edge Glass fiber cone | 4"2-way rubber edge Glass fiber cone | 5.25"2-way rubber edge Glass fiber cone | 6*93-way rubber edge Glass fiber cone | |
| Voice coil | KSV25.9 (1") | KSV25.9 (1") | KSV25.9 (1") | KSV30.5 (1.2") |
| Impedance | 4 Ohm | 4 Ohm | 4 Ohm | 4 Ohm |
| Magnet | 90*15(14oz) | 80*12(8.8oz) | 80*15(10oz) | 100*20(20.8oz) |
| Sensitivity | 90dB ±3dB | 88dB ±3dB | 89dB ±3dB | 91dB ±3dB |
| Max power | 160W | 100W | 120W | 280W |
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