Short answer: the Monoprice Monolith 10 THX Select. It ranks #90 of 145 subwoofers by sound quality, rated 3.6/5, at $699; the SVS SB13-Plus ranks #108, rated 3.3/5, and costs $1,399, which makes this an easy call rather than a real tradeoff.
Why pick the Monoprice Monolith 10 THX Select: THX-certified 10-inch ported with 500W amp extends down to 20Hz with no internal resonance or port noise.
Why pick the SVS SB13-Plus: Independent CEA-2010 testing records 92.3 dB at 20 Hz and 108.1 dB (avg of 3/4 bands) through 40-80 Hz. 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.
One note: the Monoprice Monolith 10 THX Select is no longer in production and isn’t widely stocked new anymore.
Buy the Monoprice Monolith 10 THX Select. It is rated higher for sound quality than the SVS SB13-Plus and costs less, which makes it the one to get unless you need something the other one does better.
Looking for alternatives? See the complete Subwoofers rankings.
Specifications Side By Side
| Monoprice Monolith 10 THX Select | SVS SB13-Plus | |
|---|---|---|
| Price | $699 Discontinued | $1399 Discontinued |
| Ranked | #90 of 145 in Medium Home Subwoofers (30-75 lbs) | #108 of 109 in Large Home Subwoofers (Over 75 lbs) |
| Enclosure | ported, front | sealed |
| Output SPL at 15 Hz | 95.4 dB | - |
| Output SPL at 20 Hz | 102.6 dB | 92.3 dB |
| Output SPL at 25 Hz | 107.7 dB | 97.2 dB |
| Output SPL at 31.5 Hz | 109.0 dB | 97.2 dB |
| Output SPL at 40 Hz | 110.0 dB | 108.1 dB |
| Output SPL at 50 Hz | 112.0 dB | 108.1 dB |
| Output SPL at 63 Hz | 112.0 dB | 108.1 dB |
| Output SPL at 80 Hz | 112.0 dB | - |
| Output SPL at 100 Hz | 112.0 dB | - |
| Output SPL at 125 Hz | 111.0 dB | - |
| CEA-2010-A Average (40-80Hz) | 111.5 dB | 108.1 dB (avg of 3/4 bands) |
| Dimensions | 18.9”H x 15”W x 19.7”D (480.1 x 381.0 x 500.4 mm) | 17”H x 17”W x 18”D (431.8 x 431.8 x 457.2 mm) |
| Weight | 72.5 lbs (32.9 kg) | 95 lbs (43.1 kg) |
| Warranty | 5 | 5 |
| Cabinet Color | black | - |
| Country | United States | United States |
| Measurement Source | ErinsAudioCorner | Brent Butterworth |
| Amplifier Power | 500W RMS | - |
| Frequency Response | 17-20Hz | - |
| Drivers | 10” (254mm) driver | 13” (330mm) driver |
| Inputs | XLR, RCA, XLR passthrough out | XLR (balanced), RCA |
| XLR Input | Yes | Yes |
| RCA Input | Yes | Yes |
| TRS Input | No | No |
| Optical Input | No | No |
| Coaxial Input | No | No |
| USB Input | No | No |
| HDMI Input | No | No |
| AES Input | No | No |
| Aux Input | No | No |
Related Speaker Comparisons
More top alternatives to Monoprice Monolith 10 THX Select:
- Monoprice SW-15 vs Monoprice Monolith 10 THX Select
- SVS SB-3000 vs Monoprice Monolith 10 THX Select
- RSL (Rogersound Labs) Speedwoofer 12S vs SVS SB13-Plus
- HSU Research VTF-3 MK5 HP vs SVS SB13-Plus
- HSU Research VTF-3 MK3 vs SVS SB13-Plus
Prices on this page were last checked September 29, 2026 at 3:43 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
Monoprice Monolith 10 THX Select: $699 Discontinued eBay
Newer model: the Monoprice Monolith M-10 V2, ranked lower, rated 3.4/5.
Pros: THX-certified 10-inch ported with 500W amp extends down to 20Hz with no internal resonance or port noise. HDF cabinet construction ensures inert enclosure. Variable phase adjustment and robust built-to-last design.
Cons: Discontinued.
Notes: Product # 24456
Full Monoprice Monolith 10 THX Select review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | 500W RMS |
| Aux Input | No |
| CEA-2010-A Average (40-80Hz) | 111.5 dB |
| Cabinet Color | black |
| Coaxial Input | No |
| Country | United States |
| Dimensions | 18.9”H x 15”W x 19.7”D (480.1 x 381.0 x 500.4 mm) |
| Drivers | 10” (254mm) driver |
| Enclosure | ported, front |
| Frequency Response | 17-20Hz |
| HDMI Input | No |
| Inputs | XLR, RCA, XLR passthrough out |
| Measurement Source | ErinsAudioCorner |
| Optical Input | No |
| Output SPL at 15 Hz | 95.4 dB |
| Output SPL at 20 Hz | 102.6 dB |
| Output SPL at 25 Hz | 107.7 dB |
| Output SPL at 31.5 Hz | 109.0 dB |
| Output SPL at 40 Hz | 110.0 dB |
| Output SPL at 50 Hz | 112.0 dB |
| Output SPL at 63 Hz | 112.0 dB |
| Output SPL at 80 Hz | 112.0 dB |
| Output SPL at 100 Hz | 112.0 dB |
| Output SPL at 125 Hz | 111.0 dB |
| RCA Input | Yes |
| TRS Input | No |
| USB Input | No |
| Warranty | 5 |
| Weight | 72.5 lbs (32.9 kg) |
| XLR Input | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Independently measured by ErinsAudioCorner; the published figures above come from this ASR subwoofer measurement thread.
- Head-to-Head Comparisons
SVS SB13-Plus: $1399 Discontinued eBay
Pros: Independent CEA-2010 testing records 92.3 dB at 20 Hz and 108.1 dB (avg of 3/4 bands) through 40-80 Hz. The sealed enclosure with 13” (330mm) 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 431.8H x 431.8W x 457.2D mm cabinet and 43.1 kg mass still require deliberate placement and calibration. Discontinued.
Full SVS SB13-Plus review and specifications →
| AES Input | No |
|---|---|
| Aux Input | No |
| CEA-2010-A Average (40-80Hz) | 108.1 dB (avg of 3/4 bands) |
| Coaxial Input | No |
| Country | United States |
| Dimensions | 17”H x 17”W x 18”D (431.8 x 431.8 x 457.2 mm) |
| Drivers | 13” (330mm) driver |
| Enclosure | sealed |
| HDMI Input | No |
| Inputs | XLR (balanced), RCA |
| Measurement Source | Brent Butterworth |
| Optical Input | No |
| Output SPL at 20 Hz | 92.3 dB |
| Output SPL at 25 Hz | 97.2 dB |
| Output SPL at 31.5 Hz | 97.2 dB |
| Output SPL at 40 Hz | 108.1 dB |
| Output SPL at 50 Hz | 108.1 dB |
| Output SPL at 63 Hz | 108.1 dB |
| RCA Input | Yes |
| TRS Input | No |
| USB Input | No |
| Warranty | 5 |
| Weight | 95 lbs (43.1 kg) |
| XLR Input | Yes |
- 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
- SVS SB13-Plus vs BK Electronics Monolith-DF
- SVS SB13-Plus vs RSL (Rogersound Labs) Speedwoofer 12S
- SVS SB13-Plus vs HSU Research VTF-3 MK3
- SVS SB13-Plus vs Rythmik F18
- SVS SB13-Plus vs SVS PB-4000
- SVS SB13-Plus vs HSU Research VTF-3 MK5 HP
- SVS SB13-Plus vs Rythmik FV15HP
- SVS SB13-Plus vs JTR Speakers Captivator 1400
- See all 16 comparisons