Power Sound Audio S1813M vs REL T-9X-SPECIAL-EDITION
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Choosing between the Power Sound Audio S1813M and REL T-9X-SPECIAL-EDITION? Both compete in the Subwoofer segment. Here’s how they compare across the specs that matter most for your home theater.
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Looking at overall performance dimensions: The Power Sound Audio S1813M scores higher in audio quality, volume/SPL. The REL T-9X-SPECIAL-EDITION leads in value, form factor, room fit.
Key subwoofer differences include driver sizes of 18" vs 10", and sealed vs passive-radiator enclosure designs, and the Power Sound Audio S1813M digs deeper at 19 Hz (-3dB) vs 32 Hz. Larger drivers move more air, producing deeper bass with less effort. A 15-inch driver reaches lower than a 10-inch at the same power, but the cabinet is proportionally larger. Sealed subs are tighter and more accurate, better for music. Ported subs play louder and dig deeper for the same driver/amp, better for movies. Some subs offer both via a removable port plug. A lower number means deeper bass — the rumble in explosions, the weight of a pipe organ. Below 20 Hz you feel it more than hear it.
These two Subwoofer options trade wins across different dimensions. The right choice depends on which specs matter most for your room and listening preferences — review the detailed table below to decide.
For most home theaters, the REL T-9X-SPECIAL-EDITION is the stronger choice — it leads in 3 of 5 scored dimensions. The Power Sound Audio S1813M makes more sense if you prioritize the 2 dimensions where it leads.
Performance Overview
Scores based on specs and category benchmarks (0–100 scale)
Power Sound Audio S1813M
REL T-9X-SPECIAL-EDITION
Detailed Specifications
| Specification | ||
|---|---|---|
| Price | N/A | N/A |
| Driver Size | 18" | 10" |
| RMS Watts | 1920W | 300W |
| -3dB Extension | 19Hz | 32Hz |
| -6dB Extension | — | 27Hz |
| Phase Control | No | No |
| LFE Input | No | Yes |
| Line Input | No | Yes |
| XLR Input | Yes | No |
| App Control | No | No |
| Passive | No | No |
| Enclosure | sealed | passive-radiator |
Key Differences
- RMS Watts: Power Sound Audio S1813M at 1920W vs REL T-9X-SPECIAL-EDITION at 300W. More sustained power means the sub maintains authority at high volumes without compression. RMS matters more than peak — it's the power available all the time, not just in bursts.
- Enclosure: Power Sound Audio S1813M at sealed vs REL T-9X-SPECIAL-EDITION at passive-radiator. Sealed subs are tighter and more accurate, better for music. Ported subs play louder and dig deeper for the same driver/amp, better for movies. Some subs offer both via a removable port plug.
- Driver Size: Power Sound Audio S1813M at 18" vs REL T-9X-SPECIAL-EDITION at 10". Larger drivers move more air, producing deeper bass with less effort. A 15-inch driver reaches lower than a 10-inch at the same power, but the cabinet is proportionally larger.
- -3dB Extension: Power Sound Audio S1813M at 19Hz vs REL T-9X-SPECIAL-EDITION at 32Hz. A lower number means deeper bass — the rumble in explosions, the weight of a pipe organ. Below 20 Hz you feel it more than hear it.
- -6dB Extension: Power Sound Audio S1813M at — vs REL T-9X-SPECIAL-EDITION at 27Hz
Which Should You Choose?
Choose Power Sound Audio S1813M if you want:
- + larger 18" driver
- + better rms watts — more sustained power means the sub maintains authority at high volumes without compression
- + better -3db extension — a lower number means deeper bass — the rumble in explosions, the weight of a pipe organ
See Where These Rank
Check our editorial rankings to see how Power Sound Audio S1813M and REL T-9X-SPECIAL-EDITION compare to the rest of the field.
Best Subwoofer RankingsRelated Calculators
Specifications sourced from manufacturer datasheets and verified against retailer listings. Prices updated hourly from authorized retailers. Scoring uses our open methodology — products are never ranked, promoted, or suppressed based on affiliate commission rates.
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