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JA-74A Series 
| JA-74A Series | ||||
| JA-6574A | JA-4274A | JA-5274A | JA-6974A | |
| 6.5"2ways rubber edge/electroplate satin IMPP cone | 4"2-ways rubber edge/electroplate satin IMPP cone | 5.25"2-ways rubber edge/electroplate satin IMPP cone | 6X9"3-ways rubber edge/electroplate satin IMPP cone | |
| Voice coil | ASV25.9 (1") | ASV25.9 (1") | ASV25.9 (1") | ASV30.5 (1.2") |
| Impedance | 4 Ohm | 4 Ohm | 4 Ohm | 4 Ohm |
| Magnet | 85X15(11.4oz) | 70X12(6.4oz) | 75X15(6.4oz) | 100X18(19.6oz) |
| Sensitivity | 89dB ±3dB | 87dB ±3dB | 88dB ±3dB | 90dB ±3dB |
| Max power | 140W | 100W | 120W | 180W |
| Tweeter/Midrang | 0.5"Mylar | 0.5"Mylar | 0.5"Mylar | 0.5"Mylar/2"Mylar |
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