Short answer: the Polk Audio Monitor XT10. It ranks #52 of 73 subwoofers by sound quality, rated 3.1/5, at $289. The Yamaha NS-SW100 ranks #54, rated 3.0/5, at $249.95, $39.05 cheaper, a saving that is not big enough to make up the sound-quality gap.
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.
Why pick the Yamaha NS-SW100: 10-inch ported with 100W RMS.
Buy the Polk Audio Monitor XT10. It is rated higher for sound quality, and the $39.05 saving on the Yamaha NS-SW100 is not enough to make up the difference.
Worth knowing: the Polk Audio Monitor XT10 has not been measured yet. Its rating is estimated from related models, with a likely range of 2.7 to 3.4, so treat this verdict as provisional.
Want more options? Browse the full Subwoofers rankings.
Specifications Side By Side
| Polk Audio Monitor XT10 | Yamaha NS-SW100 | |
|---|---|---|
| Price | $289.00 | $249.95 |
| Ranked | #52 of 73 in Small Home Subwoofers (Under 30 lbs) Estimated | #54 of 73 in Small Home Subwoofers (Under 30 lbs) |
| Country | United States | Japan |
| Warranty | 5/3 | 2 |
| Enclosure | ported | ported, side |
| Drivers | 10” woofer | 10” (254mm) driver |
| Amplifier Power | 50W RMS (100W peak) | - |
| 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) | 13.9”H x 13.9”W x 16.1”D (352.3 x 352.3 x 409.4 mm) |
| Weight | 22.9 lbs (10.4 kg) | 26.5 lbs (12.0 kg) |
| Output SPL at 40 Hz | - | 97.4 dB |
| Output SPL at 50 Hz | - | 103.2 dB |
| Output SPL at 63 Hz | - | 108.6 dB |
| Output SPL at 80 Hz | - | 110.7 dB |
| Output SPL at 100 Hz | - | 109.7 dB |
| Output SPL at 125 Hz | - | 107.8 dB |
| CEA-2010-A Average (40-80Hz) | - | 105.0 dB |
| Cabinet Color | - | black |
| Measurement Source | - | ErinsAudioCorner |
Related Speaker Comparisons
How Polk Audio Monitor XT10 compares with other leading options:
- Klipsch Flexus Sub 100 vs Polk Audio Monitor XT10
- Polk Audio Monitor XT10 vs Sony Bravia Theater Sub 7
- Klipsch Flexus Sub 100 vs Yamaha NS-SW100
- Monoprice Premium Select 8in 200-Watt vs Yamaha NS-SW100
- Yamaha NS-SW100 vs Yamaha NS-SW050
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
Yamaha NS-SW100: $249.95 Amazon eBay
Same family: the Yamaha NS-SW050 (smaller subwoofer, ranked lower, estimated 2.7/5).
Pros: 10-inch ported with 100W RMS. Compact 26-pound design delivers surprising deep bass at tight price point. Twisted flare port provides accurate, powerfully rich response. Stylish design complements home decor while delivering satisfying bass depth.
Full Yamaha NS-SW100 review and specifications →
| CEA-2010-A Average (40-80Hz) | 105.0 dB |
|---|---|
| Cabinet Color | black |
| Country | Japan |
| Dimensions | 13.9”H x 13.9”W x 16.1”D (352.3 x 352.3 x 409.4 mm) |
| Drivers | 10” (254mm) driver |
| Enclosure | ported, side |
| Measurement Source | ErinsAudioCorner |
| Output SPL at 40 Hz | 97.4 dB |
| Output SPL at 50 Hz | 103.2 dB |
| Output SPL at 63 Hz | 108.6 dB |
| Output SPL at 80 Hz | 110.7 dB |
| Output SPL at 100 Hz | 109.7 dB |
| Output SPL at 125 Hz | 107.8 dB |
| Warranty | 2 |
| Weight | 26.5 lbs (12.0 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons