Short answer: the Sony SA-CS9. It ranks #7 of 48 subwoofers by sound quality at $200; the Monoprice Premium Select 8in 200-Watt ranks #33 and costs $224.99, so there is little reason to consider the other one.
What the Monoprice Premium Select 8in 200-Watt offers: 8-inch ported driver still manages 106.4dB CEA-2010-A average at the lowest price of any subwoofer tested in this weight class. An easy entry point for a first subwoofer. Watch for: Very compact 8.4 kg size, limited 106.4 dB output, ported room interaction, and entry-level build.
What the Sony SA-CS9 offers: Independent CEA-2010 testing records 83.7 dB at 20 Hz and 112.7 dB through 40-80 Hz. The ported, rear enclosure with 10” (254mm) driver delivers substantial upper-bass output for movie effects and music. Watch for: Deep-bass output is more limited than the strong 40-80 Hz result suggests, so it is not the right choice when the lowest movie effects are the priority. The 344.9H x 294.9W x 399.8D mm cabinet and 11.5 kg mass still require deliberate placement and calibration.
Buy the Sony SA-CS9. It ranks higher for sound quality than the Monoprice Premium Select 8in 200-Watt and costs less, so the other one has nothing left to offer.
Still deciding? The full Subwoofers rankings cover every ranked option.
Specifications Side By Side
| Monoprice Premium Select 8in 200-Watt | Sony SA-CS9 | |
|---|---|---|
| Price | $224.99 | $200 |
| Ranked | #33 of 48 in Small Home Subwoofers (Under 30 lbs) | #7 of 48 in Small Home Subwoofers (Under 30 lbs) |
| Enclosure | ported, front | ported, rear |
| Output SPL at 20 Hz | 51.3 dB | 83.7 dB |
| Output SPL at 25 Hz | 69.3 dB | 95.1 dB |
| Output SPL at 31.5 Hz | 91.8 dB | 98.8 dB |
| Output SPL at 40 Hz | 98.3 dB | 104.3 dB |
| Output SPL at 50 Hz | 104.8 dB | 112.4 dB |
| Output SPL at 63 Hz | 110.7 dB | 117.2 dB |
| Output SPL at 80 Hz | 111.8 dB | 116.9 dB |
| CEA-2010-A Average (40-80Hz) | 106.4 dB | 112.7 dB |
| Dimensions | 15"H x 10.6"W x 12.8"D (381.0 x 269.2 x 325.1 mm) | 13.6"H x 11.6"W x 15.7"D (344.9 x 294.9 x 399.8 mm) |
| Weight | 18.5 lbs (8.4 kg) | 25.4 lbs (11.5 kg) |
| Cabinet Color | black | black |
| Country | United States | Japan |
| Measurement Source | Brent Butterworth | Brent Butterworth |
| Drivers | 8" (203mm) driver | 10" (254mm) driver |
| Warranty | - | 1? |
Related Speaker Comparisons
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- Sony SA-CS9 vs Klipsch R-10SW
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- Monoprice 10in Powered Studio Multimedia vs Monoprice Premium Select 8in 200-Watt
- Monoprice Premium Select 8in 200-Watt vs PreSonus Eris Sub 8BT
- Dayton Audio SUB-1200 vs Monoprice Premium Select 8in 200-Watt
Prices on this page were last checked September 16, 2026 at 12:41 AM 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
Monoprice Premium Select 8in 200-Watt: $224.99 Amazon eBay
Pros: 8-inch ported driver still manages 106.4dB CEA-2010-A average at the lowest price of any subwoofer tested in this weight class. An easy entry point for a first subwoofer.
Cons: Very compact 8.4 kg size, limited 106.4 dB output, ported room interaction, and entry-level build.
Notes: Product # 14567
Full Monoprice Premium Select 8in 200-Watt review and specifications →
| CEA-2010-A Average (40-80Hz) | 106.4 dB |
|---|---|
| Cabinet Color | black |
| Country | United States |
| Dimensions | 15"H x 10.6"W x 12.8"D (381.0 x 269.2 x 325.1 mm) |
| Drivers | 8" (203mm) driver |
| Enclosure | ported, front |
| Measurement Source | Brent Butterworth |
| Output SPL at 20 Hz | 51.3 dB |
| Output SPL at 25 Hz | 69.3 dB |
| Output SPL at 31.5 Hz | 91.8 dB |
| Output SPL at 40 Hz | 98.3 dB |
| Output SPL at 50 Hz | 104.8 dB |
| Output SPL at 63 Hz | 110.7 dB |
| Output SPL at 80 Hz | 111.8 dB |
| Weight | 18.5 lbs (8.4 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Independently measured by Brent Butterworth; the published figures above come from this ASR subwoofer measurement thread.
- Head-to-Head Comparisons
- Monoprice Premium Select 8in 200-Watt vs Klipsch R-10SW
- Monoprice Premium Select 8in 200-Watt vs Sonos Sub Mini
- Monoprice Premium Select 8in 200-Watt vs Yamaha NS-SW100
- Monoprice Premium Select 8in 200-Watt vs Yamaha HS8S
- Monoprice Premium Select 8in 200-Watt vs JL Audio Dominion d108
- Monoprice Premium Select 8in 200-Watt vs Q Acoustics 3060S
- Monoprice Premium Select 8in 200-Watt vs Jamo SUB 800
- Monoprice Premium Select 8in 200-Watt vs Monitor Audio BRW10
- See all 34 comparisons
Sony SA-CS9: $200 eBay
Pros: Independent CEA-2010 testing records 83.7 dB at 20 Hz and 112.7 dB through 40-80 Hz. The ported, rear enclosure with 10” (254mm) driver delivers substantial upper-bass output for movie effects and music.
Cons: Deep-bass output is more limited than the strong 40-80 Hz result suggests, so it is not the right choice when the lowest movie effects are the priority. The 344.9H x 294.9W x 399.8D mm cabinet and 11.5 kg mass still require deliberate placement and calibration.
Full Sony SA-CS9 review and specifications →
| CEA-2010-A Average (40-80Hz) | 112.7 dB |
|---|---|
| Cabinet Color | black |
| Country | Japan |
| Dimensions | 13.6"H x 11.6"W x 15.7"D (344.9 x 294.9 x 399.8 mm) |
| Drivers | 10" (254mm) driver |
| Enclosure | ported, rear |
| Measurement Source | Brent Butterworth |
| Output SPL at 20 Hz | 83.7 dB |
| Output SPL at 25 Hz | 95.1 dB |
| Output SPL at 31.5 Hz | 98.8 dB |
| Output SPL at 40 Hz | 104.3 dB |
| Output SPL at 50 Hz | 112.4 dB |
| Output SPL at 63 Hz | 117.2 dB |
| Output SPL at 80 Hz | 116.9 dB |
| Warranty | 1? |
| Weight | 25.4 lbs (11.5 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Independently measured by Brent Butterworth; the published figures above come from this ASR subwoofer measurement thread.
- Head-to-Head Comparisons