Short answer: the Polk Audio Monitor XT10. It ranks #52 of 73 subwoofers by sound quality, rated 3.1/5, at $289. The Sony Bravia Theater Sub 7 ranks #63, rated 2.9/5, at $278, $11 cheaper, which does not close the gap in sound quality.
Why pick the Polk Audio Monitor XT10: The budget subwoofer of Polk’s Monitor XT range, with a 10” woofer, a 50W (100W peak) amplifier and a compact 23 lbs (10.4 kg) cabinet. The catch: No independent measurements yet, so its output can’t be compared directly with ranked subwoofers; the rating is estimated from the measured Polk Audio PSW108, a similar 10” budget sub that reached 110.3dB in the 40 to 80Hz CEA-2010 bands.
The case for the Sony Bravia Theater Sub 7: A slim wireless subwoofer for Sony’s BRAVIA Theater soundbars, only 134mm deep so it can stand upright or lie flat under a sofa. The tradeoff: No independent measurements yet, so its output can’t be compared directly with ranked subwoofers; the rating is estimated from the measured Sony Bravia Theater Sub 9 (112.8dB in the 40 to 80Hz CEA-2010 bands).
Buy the Polk Audio Monitor XT10. It is rated higher for sound quality, and saving $11 with the Sony Bravia Theater Sub 7 does not make up for the sound-quality gap.
About the ratings: neither speaker has been measured yet, so both ratings are estimated from measured siblings and predecessors (likely ranges: Polk Audio Monitor XT10 2.7 to 3.4; Sony Bravia Theater Sub 7 2.5 to 3.2). Treat this verdict as provisional.
Want more options? Browse the full Subwoofers rankings.
Specifications Side By Side
| Polk Audio Monitor XT10 | Sony Bravia Theater Sub 7 | |
|---|---|---|
| Price | $289.00 | $278.00 |
| Ranked | #52 of 73 in Small Home Subwoofers (Under 30 lbs) Estimated | #63 of 73 in Small Home Subwoofers (Under 30 lbs) Estimated |
| Country | United States | Japan |
| Warranty | 5/3 | 1 |
| Enclosure | ported | ported |
| Drivers | 10” woofer | 5.1” (130mm) driver |
| Amplifier Power | 50W RMS (100W peak) | 100W |
| Frequency Response | 24-160Hz ±3dB (manufacturer specified) | - |
| Dimensions | 15.7”H x 11.9”W x 16.6”D (399 x 302 x 422 mm) | 14.1”H x 13.9”W x 5.3”D (358 x 352 x 134 mm) |
| Weight | 22.9 lbs (10.4 kg) | 13.7 lbs (6.2 kg) |
Related Speaker Comparisons
More worthwhile head-to-heads for Polk Audio Monitor XT10:
- Klipsch Flexus Sub 100 vs Polk Audio Monitor XT10
- Polk Audio Monitor XT10 vs Yamaha NS-SW100
- Sony Bravia Theater Sub 8 vs Sony Bravia Theater Sub 7
- Sony Bravia Theater Sub 7 vs Yamaha NS-SW050
- Sony Bravia Theater Sub 9 vs Sony Bravia Theater Sub 7
Prices on this page were last checked October 11, 2026 at 4:59 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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The Two Speakers In Full
Polk Audio Monitor XT10: $289.00 Estimated Amazon eBay
Same family: the Polk Audio XT15 (smaller bookshelf, rated 3.7/5), the Polk Monitor XT20 (larger bookshelf, rated 3.4/5), the Polk Audio XT60 (smaller floorstanding, rated 3.5/5), the Polk Audio XT70 (larger floorstanding, rated 3.6/5), the Polk Audio XT30 (smaller center, rated 3.6/5), the Polk Audio XT35 (larger center, rated 4.1/5) and the Polk Audio Monitor XT12 (larger subwoofer, estimated 3.3/5). See every Polk Monitor generation.
Pros: The budget subwoofer of Polk’s Monitor XT range, with a 10” woofer, a 50W (100W peak) amplifier and a compact 23 lb cabinet. Polk rates it 24 to 160Hz, and it matches the measured Monitor XT speakers.
Cons: No independent measurements yet, so its output can’t be compared directly with ranked subwoofers; the rating is estimated from the measured Polk Audio PSW108, a similar 10” budget sub that reached 110.3dB in the 40 to 80Hz CEA-2010 bands. A 50W amplifier limits output in all but small rooms.
Full Polk Audio Monitor XT10 review and specifications →
| Released | Nov 2022 (3 years ago) |
|---|---|
| Amplifier Power | 50W RMS (100W peak) |
| Country | United States |
| Dimensions | 15.7”H x 11.9”W x 16.6”D (399 x 302 x 422 mm) |
| Drivers | 10” woofer |
| Enclosure | ported |
| Frequency Response | 24-160Hz ±3dB (manufacturer specified) |
| Warranty | 5/3 |
| Weight | 22.9 lbs (10.4 kg) |
- Reviews, Comparisons and Sound Samples
- No independent measurement review is linked for this model; it is ranked from hands-on listening and comparison against similarly priced speakers.
- Head-to-Head Comparisons
Sony Bravia Theater Sub 7: $278.00 Estimated Amazon eBay
Same family: the Sony Bravia Theater Sub 8 (larger subwoofer, ranked higher, estimated 3.4/5) and the Sony Bravia Theater Sub 9 (larger subwoofer, rated 3.7/5).
Pros: A slim wireless subwoofer for Sony’s BRAVIA Theater soundbars, only 134mm deep so it can stand upright or lie flat under a sofa. It uses a 130mm driver with a 100W S-Master amplifier, and two can be paired.
Cons: No independent measurements yet, so its output can’t be compared directly with ranked subwoofers; the rating is estimated from the measured Sony Bravia Theater Sub 9 (112.8dB in the 40 to 80Hz CEA-2010 bands). A 130mm driver is far smaller than a normal subwoofer’s, so deep bass and output are limited, and it only works with compatible Sony soundbars.
Full Sony Bravia Theater Sub 7 review and specifications →
| Released | 2025 (1 year ago) |
|---|---|
| Amplifier Power | 100W |
| Country | Japan |
| Dimensions | 14.1”H x 13.9”W x 5.3”D (358 x 352 x 134 mm) |
| Drivers | 5.1” (130mm) driver |
| Enclosure | ported |
| Warranty | 1 |
| Weight | 13.7 lbs (6.2 kg) |
- Reviews, Comparisons and Sound Samples
- No independent measurement review is linked for this model; it is ranked from hands-on listening and comparison against similarly priced speakers.
- Head-to-Head Comparisons