Subwoofer Spec Comparison
| Parameter | 18" HDX4 Series Subwoofers | TUB10 Nippon 10 Subwoofer Tube Box |
|---|---|---|
| General | ||
| RMS Power | 2000 W | — |
| Electromechanical | ||
| Fs (Resonant Frequency) | 22.8 Hz | — |
| Qts (Total Q) | 0.439 | — |
| Qes (Electrical Q) | 0.485 | — |
| Qms (Mechanical Q) | 4.57 | — |
| Le (Inductance) | 2.477 mH | — |
| Physical / Acoustic | ||
| Vas (Eq. Compliance) | 163.3 L | — |
| Xmax (Excursion) | 15.5 mm | — |
| Mms (Moving Mass) | 616.8 g | — |
| Sd (Cone Area) | 393.7 cm² | — |
| BL (Force Factor) | 18.4 T·m | — |
| SensitivityReported sensitivity values may use different test conditions, so no winner is shown. | 88 dB | — |
| Cms (Compliance) | 0.078 mm/N | — |
| EBP (Efficiency Bandwidth Product) | 47.01 | — |
| Ideal Enclosure | Sealed | — |