Short answer: the Monoprice Monolith M-15 V2. It ranks #55 of 97 subwoofers by sound quality at $1500; the Arendal 1723 Subwoofer 2S ranks #56 and costs $2500, so there is little reason to consider the other one.
What the Arendal 1723 Subwoofer 2S offers: Published CEA-2010 specifications list 102.6 dB at 20 Hz and 119.8 dB through 40-80 Hz. The sealed enclosure with 2x 13.8” (351mm) driver delivers formidable 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 529.8H x 419.9W x 499.9D mm cabinet and 41.4 kg mass still require deliberate placement and calibration.
What the Monoprice Monolith M-15 V2 offers: Published CEA-2010 specifications list 112.6 dB at 20 Hz and 120.0 dB through 40-80 Hz. Its front-ported 15-inch design has substantial deep-bass and midbass headroom for cinema playback. Watch for: Discontinued and no longer sold new. At 60.3 kg and 729.0H x 449.6W x 680.7D mm, it needs committed floor space and careful room integration.
Buy the Monoprice Monolith M-15 V2. It ranks higher for sound quality than the Arendal 1723 Subwoofer 2S and costs less, so the other one has nothing left to offer.
Specifications Side By Side
| Arendal 1723 Subwoofer 2S | Monoprice Monolith M-15 V2 | |
|---|---|---|
| Price | $2,500 | $1,500 Discontinued |
| Ranked | #56 of 97 in Large Powered Home Subwoofers (Over 75 lbs) | #55 of 97 in Large Powered Home Subwoofers (Over 75 lbs) |
| Enclosure | sealed | ported, front |
| Output SPL at 12.5 Hz | 90.3 dB | 91.0 dB |
| Output SPL at 15 Hz | 96.4 dB | 106.3 dB |
| Output SPL at 20 Hz | 102.6 dB | 112.6 dB |
| Output SPL at 25 Hz | 107.1 dB | 116.6 dB |
| Output SPL at 31.5 Hz | 110.8 dB | 119.5 dB |
| Output SPL at 40 Hz | 114.7 dB | 120.9 dB |
| Output SPL at 50 Hz | 121.2 dB | 120.6 dB |
| Output SPL at 63 Hz | 121.2 dB | 120.0 dB |
| Output SPL at 80 Hz | 122.3 dB | 118.7 dB |
| Output SPL at 100 Hz | 121.4 dB | 120.1 dB |
| Output SPL at 125 Hz | 120.4 dB | 120.2 dB |
| CEA-2010-A Average (40-80Hz) | 119.8 dB | 120.0 dB |
| Dimensions | 20.9"H x 16.5"W x 19.7"D (529.8 x 419.9 x 499.9 mm) | 28.7"H x 17.7"W x 26.8"D (729.0 x 449.6 x 680.7 mm) |
| Weight | 91.3 lbs / 41.4 kg | 132.9 lbs / 60.3 kg |
| Warranty | 10/5 | 5 |
| Cabinet Color | black, white | black |
| Country | Norway | United States |
| Measurement Source | Manufacturer | Manufacturer |
| Drivers | 2x 13.8" (351mm) driver | 15" (381mm) driver |
| Discontinued | - | Yes |
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- SVS SB-4000 vs SVS PB-4000
- Rythmik F18 vs SVS PB-4000
- Rythmik FV15HP vs SVS PB-4000
- Monoprice Monolith M-15 V2 vs Monoprice Monolith M-215
- Monoprice Monolith 16 THX Ultra vs Monoprice Monolith M-15 V2
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
Arendal 1723 Subwoofer 2S: $2,500 eBay
Pros: Published CEA-2010 specifications list 102.6 dB at 20 Hz and 119.8 dB through 40-80 Hz. The sealed enclosure with 2x 13.8” (351mm) driver delivers formidable 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 529.8H x 419.9W x 499.9D mm cabinet and 41.4 kg mass still require deliberate placement and calibration.
Full Arendal 1723 Subwoofer 2S review and specifications →
| CEA-2010-A Average (40-80Hz) | 119.8 dB |
|---|---|
| Cabinet Color | black, white |
| Country | Norway |
| Dimensions | 20.9"H x 16.5"W x 19.7"D (529.8 x 419.9 x 499.9 mm) |
| Drivers | 2x 13.8" (351mm) driver |
| Enclosure | sealed |
| Measurement Source | Manufacturer |
| Output SPL at 12.5 Hz | 90.3 dB |
| Output SPL at 15 Hz | 96.4 dB |
| Output SPL at 20 Hz | 102.6 dB |
| Output SPL at 25 Hz | 107.1 dB |
| Output SPL at 31.5 Hz | 110.8 dB |
| Output SPL at 40 Hz | 114.7 dB |
| Output SPL at 50 Hz | 121.2 dB |
| Output SPL at 63 Hz | 121.2 dB |
| Output SPL at 80 Hz | 122.3 dB |
| Output SPL at 100 Hz | 121.4 dB |
| Output SPL at 125 Hz | 120.4 dB |
| Warranty | 10/5 |
| Weight | 91.3 lbs / 41.4 kg |
- Links
- Reviews, Comparisons and Sound Samples
Monoprice Monolith M-15 V2: $1,500 Discontinued eBay
Pros: Published CEA-2010 specifications list 112.6 dB at 20 Hz and 120.0 dB through 40-80 Hz. Its front-ported 15-inch design has substantial deep-bass and midbass headroom for cinema playback.
Cons: Discontinued and no longer sold new. At 60.3 kg and 729.0H x 449.6W x 680.7D mm, it needs committed floor space and careful room integration. Discontinued.
Notes: Product # 42851
Full Monoprice Monolith M-15 V2 review and specifications →
| CEA-2010-A Average (40-80Hz) | 120.0 dB |
|---|---|
| Cabinet Color | black |
| Country | United States |
| Dimensions | 28.7"H x 17.7"W x 26.8"D (729.0 x 449.6 x 680.7 mm) |
| Discontinued | Yes |
| Drivers | 15" (381mm) driver |
| Enclosure | ported, front |
| Measurement Source | Manufacturer |
| Output SPL at 12.5 Hz | 91.0 dB |
| Output SPL at 15 Hz | 106.3 dB |
| Output SPL at 20 Hz | 112.6 dB |
| Output SPL at 25 Hz | 116.6 dB |
| Output SPL at 31.5 Hz | 119.5 dB |
| Output SPL at 40 Hz | 120.9 dB |
| Output SPL at 50 Hz | 120.6 dB |
| Output SPL at 63 Hz | 120.0 dB |
| Output SPL at 80 Hz | 118.7 dB |
| Output SPL at 100 Hz | 120.1 dB |
| Output SPL at 125 Hz | 120.2 dB |
| Warranty | 5 |
| Weight | 132.9 lbs / 60.3 kg |
- Reviews, Comparisons and Sound Samples
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- Monoprice Monolith M-15 V2 vs HSU Research VTF-15H MK2
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- Monoprice Monolith M-15 V2 vs Monoprice Monolith M-215
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