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39A-Series 
| JA-6239A | JA-4239A | JA-5239A | JA-6939A | |
6.5"2-way rubber-edge Sand surface Paper cone | 4"2-way rubber-edge Sand surface paper cone | 5.25"2-way rubber-edge Sand surface paper cone | 6*9"3-way rubber-edge Sand surface paper cone | |
| Voice coil | ASV25.9(1") | ASV25.9(1") | ASV25.9(1") | ASV25.9(1") |
| Impedance | 4 Ohm | 4 Ohm | 4 Ohm | 4 Ohm |
| Magnet | 80X15(10oz) | 70X10(5.3oz) | 70X12(6.4oz) | 100X18(20oz) |
| Sensitivity | 87dB ±3dB | 85dB ±3dB | 86dB ±3dB | 88dB ±3dB |
| Max power | 120W | 60W | 80W | 180W |
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