JBL STAGEA120P vs Klipsch SW-15-II
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Choosing between the JBL STAGEA120P and Klipsch SW-15-II? 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 JBL STAGEA120P scores higher in value, volume/SPL, form factor, room fit. The Klipsch SW-15-II leads in audio quality.
Key subwoofer differences include driver sizes of 12" vs 15", and ported vs bass-reflex enclosure designs, and the Klipsch SW-15-II digs deeper at 27 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.
The JBL STAGEA120P holds an advantage across more performance dimensions, but the Klipsch SW-15-II may still be the better pick depending on which specs matter most to your setup. See the detailed comparison table below for the full breakdown.
For most home theaters, the JBL STAGEA120P is the stronger choice — it leads in 4 of 5 scored dimensions. The Klipsch SW-15-II makes more sense if you prioritize the 1 dimension where it leads.
Performance Overview
Scores based on specs and category benchmarks (0–100 scale)
JBL STAGEA120P
Klipsch SW-15-II
Detailed Specifications
| Specification | ||
|---|---|---|
| Price | N/A | N/A |
| Driver Size | 12" | 15" |
| RMS Watts | 250W | 200W |
| -3dB Extension | 32Hz | 27Hz |
| -6dB Extension | — | — |
| Phase Control | Yes | Yes |
| LFE Input | Yes | No |
| Line Input | No | No |
| XLR Input | No | No |
| App Control | No | No |
| Passive | No | No |
| Enclosure | ported | bass-reflex |
Key Differences
- Enclosure: JBL STAGEA120P at ported vs Klipsch SW-15-II at bass-reflex. 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: JBL STAGEA120P at 12" vs Klipsch SW-15-II at 15". 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.
- RMS Watts: JBL STAGEA120P at 250W vs Klipsch SW-15-II at 200W. 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: JBL STAGEA120P at 32Hz vs Klipsch SW-15-II at 27Hz. 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.
- LFE Input: JBL STAGEA120P at Yes vs Klipsch SW-15-II at No
Which Should You Choose?
Choose JBL STAGEA120P if you want:
- + better rms watts — more sustained power means the sub maintains authority at high volumes without compression
Choose Klipsch SW-15-II if you want:
- + larger 15" driver
- + 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 JBL STAGEA120P and Klipsch SW-15-II 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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