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12A-Series 
| JA-6212A | JA-4212A | JA-5212A | JA-6912A | |
| Item | 6.5" 2-Way Rubber-edge Wooden Fiber Compound Cone | 4" 2-Way Rubber-edge Wooden Fiber Compound Cone | 5.25" 2-Way Rubber-edge Wooden Fiber Compound Cone | 6*9" 2-Way Rubber-edge Wooden Fiber Compound Cone |
| Cone | Wooden Fiber Compound | Wooden Fiber Compound | Wooden Fiber Compound | Wooden Fiber Compound |
| Surround | Rubber | Rubber | Rubber | Rubber |
| Voice Coil | Ksv25.9(1") | Ksv25.9(1") | Ksv25.9(1") | Ksv30.5(1.18") |
| Impedance | 4 Ohms | 4 Ohms | 4 Ohms | 4 Ohms |
| Magnet | 90*15(14.1oz) | 70*12(6.4oz) | 80*12(8.8oz) | 100*20(20.8oz) |
| Tweeter | Silk dome tweeter | Silk dome tweeter | Silk dome tweeter | Silk dome tweeter |
| Frequency Response (+/- 3dB) | 60-20,000Hz | 80-20,000Hz | 70-20,000Hz | 50-20,000Hz |
| Sensitivity (2.83v/1m) | 88dB ± 3 dB | 84dB ± 3 dB | 87dB ± 3 dB | 90dB ± 3 dB |
| Max power | 180W | 100W | 140W | 250W |
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