| Model | NSE61 | NSE51 | NSE41 |
| Speaker type | 6.5" 2-way | 5" 1-way | 4" 1-way |
| RMS power | 20W | 15W | 12W |
| Sensitivity (1W/m) | 89±3dB | 88±3dB | 88±3dB |
| Frequency response | 103-16kHZ | 90-20k Hz | 180-18k Hz |
| Impedance | 4 ohms | 4 ohms | 4 ohms |
| Voice coil | KSV25.5mm | KSV20.4mm | KSV20.4mm |
| Magnet mass | 5.3Oz | 3.5Oz | 3.5Oz |
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