Klipsch KSW-300 vs Power Sound Audio S1801
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Choosing between the Klipsch KSW-300 and Power Sound Audio S1801? 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 Klipsch KSW-300 scores higher in form factor, room fit. The Power Sound Audio S1801 leads in value, audio quality, volume/SPL.
Key subwoofer differences include driver sizes of 15" vs 18", and bass-reflex vs sealed enclosure designs, and the Power Sound Audio S1801 digs deeper at 17 Hz (-3dB) vs 25 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 Power Sound Audio S1801 is the stronger choice — it leads in 3 of 5 scored dimensions. The Klipsch KSW-300 makes more sense if you prioritize the 2 dimensions where it leads.
Performance Overview
Scores based on specs and category benchmarks (0–100 scale)
Klipsch KSW-300
Power Sound Audio S1801
Detailed Specifications
| Specification | ||
|---|---|---|
| Price | N/A | N/A |
| Driver Size | 15" | 18" |
| RMS Watts | 300W | 725W |
| -3dB Extension | 25Hz | 17Hz |
| -6dB Extension | — | — |
| Phase Control | Yes | No |
| LFE Input | Yes | No |
| Line Input | Yes | Yes |
| XLR Input | No | No |
| App Control | No | No |
| Passive | No | No |
| Enclosure | bass-reflex | sealed |
Key Differences
- Enclosure: Klipsch KSW-300 at bass-reflex vs Power Sound Audio S1801 at sealed. 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.
- RMS Watts: Klipsch KSW-300 at 300W vs Power Sound Audio S1801 at 725W. 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.
- -3dB Extension: Klipsch KSW-300 at 25Hz vs Power Sound Audio S1801 at 17Hz. 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.
- Driver Size: Klipsch KSW-300 at 15" vs Power Sound Audio S1801 at 18". 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.
- Phase Control: Klipsch KSW-300 at Yes vs Power Sound Audio S1801 at No
Which Should You Choose?
Choose Power Sound Audio S1801 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 Klipsch KSW-300 and Power Sound Audio S1801 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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