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90-Series 
| JA-6290 | JA-4290 | JA-5290 | JA-6990 | |
| Item | 6.5" 2-Way pp Cone | 4" 2-Way pp Cone | 5.25" 2-Way pp Cone | 6*9" 4-Way pp Cone |
| Cone | PP | PP | PP | PP |
| Surround | Rubber | Rubber | Rubber | Rubber |
| Voice Coil | Asv25.9 (1") | Asv25.9 (1") | Asv25.9 (1") | Asv30.5(1.18") |
| Impedance | 4 Ohms | 4 Ohms | 4 Ohms | 4 Ohms |
| Magnet | 80*15(11.1oz) | 70*12(6.4oz) | 70*12(6.4oz) | 100*18(20oz) |
| Woofer Size | 165mm | 102mm | 129*129mm | 235*163mm |
| Mid-Range | 54mm Mylar | |||
| Tweeter | 51mm Mylar | 40mm Mylar | 40mm Mylar | 27mm Mylar |
| Frequency Response (+/- 3dB) | 50-20,000Hz | 60-20,000Hz | 60-20,000Hz | 45-20,000Hz |
| Sensitivity (2.83v/1m) | 87dB ± 3 dB | 84dB ± 3 dB | 85dB ± 3 dB | 89dB ± 3 dB |
| Max power | 60w | 50w | 55w | 90w |
