Short answer: the Klipsch SPL-120. It ranks #18 of 145 subwoofers by sound quality at $429.99; the Monitor Audio RXW12 ranks #98 and costs $799, which makes this an easy call rather than a real tradeoff.
What the Klipsch SPL-120 offers: 12-inch ported with 300W delivers room-filling bass hitting nearly 118dB max SPL. Clean accurate response across whole bass register with tight controlled response at high volumes. Wireless connectivity with optional WA-2 accessory. Watch for: No detailed measurement caveats are currently recorded.
What the Monitor Audio RXW12 offers: Sealed 12-inch with 500W RMS delivers terrific output peaking at 122dB at 63Hz. Powerful punchy bass with excellent pitch definition. Well-suited for small to medium rooms. Watch for: No detailed measurement caveats are currently recorded.
Buy the Klipsch SPL-120. It ranks higher for sound quality than the Monitor Audio RXW12 and costs less, so there is no real case for the other one.
Want more options? Browse the full Subwoofers rankings.
Specifications Side By Side
| Klipsch SPL-120 | Monitor Audio RXW12 | |
|---|---|---|
| Price | $429.99 | $799 |
| Ranked | #18 of 145 in Medium Home Subwoofers (30-75 lbs) | #98 of 145 in Medium Home Subwoofers (30-75 lbs) |
| Enclosure | ported, front | sealed |
| Output SPL at 20 Hz | 97.9 dB | 88.9 dB |
| Output SPL at 25 Hz | 108.2 dB | 92.0 dB |
| Output SPL at 31.5 Hz | 113.5 dB | 97.9 dB |
| Output SPL at 40 Hz | 116.8 dB | 111.5 dB |
| Output SPL at 50 Hz | 119.8 dB | 114.9 dB |
| Output SPL at 63 Hz | 120.9 dB | 106.3 dB |
| Output SPL at 80 Hz | 121.2 dB | - |
| CEA-2010-A Average (40-80Hz) | 119.7 dB | 110.9 dB (avg of 3/4 bands) |
| Dimensions | 17.7"H x 14.7"W x 19.9"D (450.8 x 372.9 x 504.7 mm) | 15"H x 16.9"W x 16.9"D (381.0 x 430.0 x 430.0 mm) |
| Weight | 45 lbs (20.4 kg) | 49.8 lbs (22.6 kg) |
| Warranty | 5/2 | 5 |
| Cabinet Color | black | - |
| Country | United States | United Kingdom |
| Measurement Source | Brent Butterworth | Brent Butterworth |
| Amplifier Power | 300W RMS | 500W RMS |
| Frequency Response | 24-125Hz | 21-40Hz |
| Drivers | 12" (305mm) driver | 12" (305mm) driver |
| Output SPL at 16 Hz | 87.2 dB | - |
Related Speaker Comparisons
More worthwhile head-to-heads for Klipsch SPL-120:
- MartinLogan Dynamo 1600X vs Klipsch SPL-120
- HSU Research ULS-15 MK2 vs Klipsch SPL-120
- Monoprice SW-12 vs Klipsch SPL-120
- Monoprice SW-15 vs Klipsch SPL-120
- SVS SB-3000 vs Klipsch SPL-120
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.
As an eBay Partner, we may be compensated if you make a purchase.
The Two Speakers In Full
Klipsch SPL-120: $429.99 Amazon eBay
Pros: 12-inch ported with 300W delivers room-filling bass hitting nearly 118dB max SPL. Clean accurate response across whole bass register with tight controlled response at high volumes. Wireless connectivity with optional WA-2 accessory.
Full Klipsch SPL-120 review and specifications →
| Amplifier Power | 300W RMS |
|---|---|
| CEA-2010-A Average (40-80Hz) | 119.7 dB |
| Cabinet Color | black |
| Country | United States |
| Dimensions | 17.7"H x 14.7"W x 19.9"D (450.8 x 372.9 x 504.7 mm) |
| Drivers | 12" (305mm) driver |
| Enclosure | ported, front |
| Frequency Response | 24-125Hz |
| Measurement Source | Brent Butterworth |
| Output SPL at 16 Hz | 87.2 dB |
| Output SPL at 20 Hz | 97.9 dB |
| Output SPL at 25 Hz | 108.2 dB |
| Output SPL at 31.5 Hz | 113.5 dB |
| Output SPL at 40 Hz | 116.8 dB |
| Output SPL at 50 Hz | 119.8 dB |
| Output SPL at 63 Hz | 120.9 dB |
| Output SPL at 80 Hz | 121.2 dB |
| Warranty | 5/2 |
| Weight | 45 lbs (20.4 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
- Klipsch SPL-120 vs Rythmik F12
- Klipsch SPL-120 vs SVS SB-3000
- Klipsch SPL-120 vs Monoprice SW-15
- Klipsch SPL-120 vs Monoprice SW-12
- Klipsch SPL-120 vs HSU Research ULS-15 MK2
- Klipsch SPL-120 vs SVS SB-2000
- Klipsch SPL-120 vs MartinLogan Dynamo 1600X
- Klipsch SPL-120 vs SVS PB-1000 PRO
- See all 11 comparisons
Monitor Audio RXW12: $799 eBay
Pros: Sealed 12-inch with 500W RMS delivers terrific output peaking at 122dB at 63Hz. Powerful punchy bass with excellent pitch definition. Well-suited for small to medium rooms.
Full Monitor Audio RXW12 review and specifications →
| Amplifier Power | 500W RMS |
|---|---|
| CEA-2010-A Average (40-80Hz) | 110.9 dB (avg of 3/4 bands) |
| Country | United Kingdom |
| Dimensions | 15"H x 16.9"W x 16.9"D (381.0 x 430.0 x 430.0 mm) |
| Drivers | 12" (305mm) driver |
| Enclosure | sealed |
| Frequency Response | 21-40Hz |
| Measurement Source | Brent Butterworth |
| Output SPL at 20 Hz | 88.9 dB |
| Output SPL at 25 Hz | 92.0 dB |
| Output SPL at 31.5 Hz | 97.9 dB |
| Output SPL at 40 Hz | 111.5 dB |
| Output SPL at 50 Hz | 114.9 dB |
| Output SPL at 63 Hz | 106.3 dB |
| Warranty | 5 |
| Weight | 49.8 lbs (22.6 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
- Monitor Audio RXW12 vs RSL (Rogersound Labs) Speedwoofer 10S MKII
- Monitor Audio RXW12 vs Monoprice SSW-10
- Monitor Audio RXW12 vs BIC America PL-300
- Monitor Audio RXW12 vs SVS PB-1000 PRO
- Monitor Audio RXW12 vs SVS SB-2000
- Monitor Audio RXW12 vs Rythmik F12
- Monitor Audio RXW12 vs SVS SB-3000
- Monitor Audio RXW12 vs Monoprice SW-15
- See all 10 comparisons