Short answer: the Monoprice Monolith M-210 for better sound quality, the Klipsch R-115SW for the lower price. The Monoprice Monolith M-210 ranks #76 of 97 subwoofers at $1300. The Klipsch R-115SW ranks #77 at $799, $501 cheaper.
What the Klipsch R-115SW offers: Independent CEA-2010 testing records 102.7 dB at 20 Hz and 117.1 dB (avg of 3/4 bands) through 40-80 Hz. The ported, front enclosure with 15” (381mm) 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 546.1H x 495.3W x 566.4D mm cabinet and 34.2 kg mass still require deliberate placement and calibration.
What the Monoprice Monolith M-210 offers: Independent CEA-2010 testing records 101.4 dB at 20 Hz and 117.5 dB through 40-80 Hz. The ported, front enclosure with 2x 10” (254mm) drivers 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 924.6H x 449.6W x 599.4D mm cabinet and 73.5 kg mass still require deliberate placement and calibration.
Buy the Klipsch R-115SW if the price matters more than sound quality. Buy the Monoprice Monolith M-210 if sound quality matters more than the price.
Skip both if sound quality is the priority. There are better options higher up the 97 subwoofers.
Specifications Side By Side
| Klipsch R-115SW | Monoprice Monolith M-210 | |
|---|---|---|
| Price | $799 | $1,300 |
| Ranked | #77 of 97 in Large Powered Home Subwoofers (Over 75 lbs) | #76 of 97 in Large Powered Home Subwoofers (Over 75 lbs) |
| Enclosure | ported, front | ported, front |
| Output SPL at 20 Hz | 102.7 dB | 101.4 dB |
| Output SPL at 25 Hz | 107.8 dB | 107.6 dB |
| Output SPL at 31.5 Hz | 112.6 dB | 110.1 dB |
| Output SPL at 40 Hz | 115.4 dB | 113.6 dB |
| Output SPL at 50 Hz | 118.7 dB | 122.9 dB |
| Output SPL at 63 Hz | 117.3 dB | 115.5 dB |
| CEA-2010-A Average (40-80Hz) | 117.1 dB (avg of 3/4 bands) | 117.5 dB |
| Dimensions | 21.5"H x 19.5"W x 22.3"D (546.1 x 495.3 x 566.4 mm) | 36.4"H x 17.7"W x 23.6"D (924.6 x 449.6 x 599.4 mm) |
| Weight | 75.4 lbs / 34.2 kg | 162 lbs / 73.5 kg |
| Warranty | 5/2 | 5 |
| Cabinet Color | black | black |
| Country | United States | United States |
| Measurement Source | Brent Butterworth | Brent Butterworth |
| Drivers | 15" (381mm) driver | 2x 10" (254mm) drivers |
| Output SPL at 15 Hz | - | 95.6 dB |
| Output SPL at 80 Hz | - | 118.2 dB |
| Output SPL at 100 Hz | - | 118.3 dB |
| Output SPL at 125 Hz | - | 119.6 dB |
Related Speaker Comparisons
A few more comparisons worth a look in the same class:
- ELAC SUB3070 vs Funkywaves FW 12.X
- Arendal 1723 Subwoofer 1V vs Funkywaves FW 12.X
- Kreisel Sound DXD-12012 vs Arendal 1723 Subwoofer 1V
- Monoprice Monolith M-210 vs Premier Acoustics PA-150
- Paradigm Prestige 2000SW vs Kreisel Sound DXD-12012
Prices on this page were last checked September 8, 2026 at 6:02 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
Klipsch R-115SW: $799 eBay
Pros: Independent CEA-2010 testing records 102.7 dB at 20 Hz and 117.1 dB (avg of 3/4 bands) through 40-80 Hz. The ported, front enclosure with 15” (381mm) 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 546.1H x 495.3W x 566.4D mm cabinet and 34.2 kg mass still require deliberate placement and calibration.
Full Klipsch R-115SW review and specifications →
| CEA-2010-A Average (40-80Hz) | 117.1 dB (avg of 3/4 bands) |
|---|---|
| Cabinet Color | black |
| Country | United States |
| Dimensions | 21.5"H x 19.5"W x 22.3"D (546.1 x 495.3 x 566.4 mm) |
| Drivers | 15" (381mm) driver |
| Enclosure | ported, front |
| Measurement Source | Brent Butterworth |
| Output SPL at 20 Hz | 102.7 dB |
| Output SPL at 25 Hz | 107.8 dB |
| Output SPL at 31.5 Hz | 112.6 dB |
| Output SPL at 40 Hz | 115.4 dB |
| Output SPL at 50 Hz | 118.7 dB |
| Output SPL at 63 Hz | 117.3 dB |
| Warranty | 5/2 |
| Weight | 75.4 lbs / 34.2 kg |
- Links
- Reviews, Comparisons and Sound Samples
Monoprice Monolith M-210: $1,300 eBay
Pros: Independent CEA-2010 testing records 101.4 dB at 20 Hz and 117.5 dB through 40-80 Hz. The ported, front enclosure with 2x 10” (254mm) drivers 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 924.6H x 449.6W x 599.4D mm cabinet and 73.5 kg mass still require deliberate placement and calibration.
Notes: Product # 38545
Full Monoprice Monolith M-210 review and specifications →
| CEA-2010-A Average (40-80Hz) | 117.5 dB |
|---|---|
| Cabinet Color | black |
| Country | United States |
| Dimensions | 36.4"H x 17.7"W x 23.6"D (924.6 x 449.6 x 599.4 mm) |
| Drivers | 2x 10" (254mm) drivers |
| Enclosure | ported, front |
| Measurement Source | Brent Butterworth |
| Output SPL at 15 Hz | 95.6 dB |
| Output SPL at 20 Hz | 101.4 dB |
| Output SPL at 25 Hz | 107.6 dB |
| Output SPL at 31.5 Hz | 110.1 dB |
| Output SPL at 40 Hz | 113.6 dB |
| Output SPL at 50 Hz | 122.9 dB |
| Output SPL at 63 Hz | 115.5 dB |
| Output SPL at 80 Hz | 118.2 dB |
| Output SPL at 100 Hz | 118.3 dB |
| Output SPL at 125 Hz | 119.6 dB |
| Warranty | 5 |
| Weight | 162 lbs / 73.5 kg |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons