Power Sound Audio TV21-IPAL vs SVS SB17-ULTRA-R
Prices updated hourly. Check retailer for current availability.
Choosing between the Power Sound Audio TV21-IPAL and SVS SB17-ULTRA-R? Both compete in the Subwoofer segment. Here’s how they compare across the specs that matter most for your home theater.
Looking at overall performance dimensions: The SVS SB17-ULTRA-R leads in value, form factor, room fit. They score similarly in audio quality, volume/SPL.
Key subwoofer differences include driver sizes of 21" vs 17", and bass-reflex vs sealed enclosure designs. 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.
The SVS SB17-ULTRA-R holds an advantage across more performance dimensions, but the Power Sound Audio TV21-IPAL 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 SVS SB17-ULTRA-R is the stronger choice — it leads in 3 of 5 scored dimensions. The Power Sound Audio TV21-IPAL makes more sense if budget is the primary constraint.
Performance Overview
Scores based on specs and category benchmarks (0–100 scale)
Power Sound Audio TV21-IPAL
SVS SB17-Ultra Subwoofer – 17” Driver, 2,800 Watts RMS – Black Oak Veneer
Detailed Specifications
| Specification | ||
|---|---|---|
| Price | N/A | $2,499.99 |
| Driver Size | 21" | 17" |
| RMS Watts | 4000W | 2800W |
| -3dB Extension | 12Hz | — |
| -6dB Extension | — | — |
| Phase Control | No | Yes |
| LFE Input | No | No |
| Line Input | Yes | Yes |
| XLR Input | Yes | Yes |
| App Control | No | Yes |
| Passive | No | No |
| Enclosure | bass-reflex | sealed |
Key Differences
- Enclosure: Power Sound Audio TV21-IPAL at bass-reflex vs SVS SB17-ULTRA-R 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: Power Sound Audio TV21-IPAL at 4000W vs SVS SB17-ULTRA-R at 2800W. 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.
- Driver Size: Power Sound Audio TV21-IPAL at 21" vs SVS SB17-ULTRA-R at 17". 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 TV21-IPAL at 12Hz vs SVS SB17-ULTRA-R at —. 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.
- Phase Control: Power Sound Audio TV21-IPAL at No vs SVS SB17-ULTRA-R at Yes
Which Should You Choose?
Choose Power Sound Audio TV21-IPAL if you want:
- + larger 21" driver
- + better rms watts — more sustained power means the sub maintains authority at high volumes without compression
See Where These Rank
Check our editorial rankings to see how Power Sound Audio TV21-IPAL and SVS SB17-ULTRA-R 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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