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42A-Series 
| JA-6242A | JA-4242A | JA-5242A | JA-6942A | |
| 6.5"2-way rubber-edge black&gary glass fiber woven cone | 4"2-way rubber-edge black&gary glass fiber woven cone | 5.25"2-way rubber-edge black&gary glass fiber woven cone | 6*9"3-way rubber-edge black&gary glass fiber woven cone | |
| Voice coil | KSV25.9(1") | ASV25.9(1") | ASV25.9(1") | ASV30.5(1.2") |
| Impedance | 4 Ohm | 4 Ohm | 4 Ohm | 4 Ohm |
| Magnet | 90X15(12.5oz) | 75X15(9.4oz) | 75X15(9.4oz) | 100X15(16.6oz) |
| Sensitivity | 89dB ±3dB | 87dB ±3dB | 89dB ±3dB | 89dB ±3dB |
| Max power | 160W | 80W | 100W | 240W |
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