Short answer: the JTR Speakers Orbit Shifter PRO for the higher ranking, the Monoprice Monolith M15-S for the lower price. The JTR Speakers Orbit Shifter PRO ranks #1 of 97 subwoofers at $4200. The Monoprice Monolith M15-S ranks #62 at $999, $3201 cheaper.
On the JTR Speakers Orbit Shifter PRO side: Dual 18-inch horn-loaded drivers deliver a class-leading 141.3dB CEA-2010-A average, well beyond any other subwoofer tested. Set against that: Extremely high price ($4,200) and weighs 84 kg - requires dedicated placement and amplifier.
Buy the JTR Speakers Orbit Shifter PRO if the ranking matters more than the price. Buy the Monoprice Monolith M15-S if the price matters more than the ranking.
Specifications Side By Side
| JTR Speakers Orbit Shifter PRO | Monoprice Monolith M15-S | |
|---|---|---|
| Price | $4,200 | $999 |
| Ranked | #1 of 97 in Large Powered Home Subwoofers (Over 75 lbs) | #62 of 97 in Large Powered Home Subwoofers (Over 75 lbs) |
| Enclosure | horn | sealed |
| Output SPL at 15 Hz | 95.7 dB | 100.1 dB |
| Output SPL at 20 Hz | 101.9 dB | 105.6 dB |
| Output SPL at 25 Hz | 114.9 dB | 111.2 dB |
| Output SPL at 31.5 Hz | 128.2 dB | 115.2 dB |
| Output SPL at 40 Hz | 136.0 dB | 118.4 dB |
| Output SPL at 50 Hz | 141.0 dB | 119.3 dB |
| Output SPL at 63 Hz | 144.0 dB | 119.6 dB |
| Output SPL at 80 Hz | 144.2 dB | 118.9 dB |
| Output SPL at 100 Hz | 143.4 dB | 119.1 dB |
| Output SPL at 125 Hz | 140.1 dB | 118.9 dB |
| CEA-2010-A Average (40-80Hz) | 141.3 dB | 119.0 dB |
| Dimensions | 45.0"H x 22.5"W x 32.0"D (1143.0 x 571.5 x 812.8 mm) | 23.5"H x 16.7"W x 19.7"D (596.9 x 424.2 x 500.4 mm) |
| Weight | 185 lbs / 83.9 kg | 80 lbs / 36.3 kg |
| Warranty | 5 | 5 |
| Cabinet Color | black | - |
| Country | United States | United States |
| Measurement Source | Data-bass | Manufacturer |
| Drivers | 18" (457mm) driver | 15" (381mm) driver |
The Two Speakers In Full
JTR Speakers Orbit Shifter PRO: $4,200
Pros: Dual 18-inch horn-loaded drivers deliver a class-leading 141.3dB CEA-2010-A average, well beyond any other subwoofer tested. Built for dedicated home theaters chasing reference-level output rather than living-room duty.
Cons: Extremely high price ($4,200) and weighs 84 kg - requires dedicated placement and amplifier.
Notes: Looks like “PA sub”
| CEA-2010-A Average (40-80Hz) | 141.3 dB |
|---|---|
| Cabinet Color | black |
| Country | United States |
| Dimensions | 45.0"H x 22.5"W x 32.0"D (1143.0 x 571.5 x 812.8 mm) |
| Drivers | 18" (457mm) driver |
| Enclosure | horn |
| Measurement Source | Data-bass |
| Output SPL at 15 Hz | 95.7 dB |
| Output SPL at 20 Hz | 101.9 dB |
| Output SPL at 25 Hz | 114.9 dB |
| Output SPL at 31.5 Hz | 128.2 dB |
| Output SPL at 40 Hz | 136.0 dB |
| Output SPL at 50 Hz | 141.0 dB |
| Output SPL at 63 Hz | 144.0 dB |
| Output SPL at 80 Hz | 144.2 dB |
| Output SPL at 100 Hz | 143.4 dB |
| Output SPL at 125 Hz | 140.1 dB |
| Warranty | 5 |
| Weight | 185 lbs / 83.9 kg |
- Head-to-Head Comparisons
- JTR Speakers Orbit Shifter PRO vs JTR Speakers Orbit Shifter LFU
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- JTR Speakers Orbit Shifter PRO vs JTR Speakers Captivator 4000ULF
- JTR Speakers Orbit Shifter PRO vs JTR Speakers Captivator S2
- JTR Speakers Orbit Shifter PRO vs Monoprice Monolith 16 THX Ultra
- JTR Speakers Orbit Shifter PRO vs Reaction Audio PV-15X
- JTR Speakers Orbit Shifter PRO vs Monoprice Monolith M-215
- JTR Speakers Orbit Shifter PRO vs Rythmik FV15HP
- See all 13 comparisons
- Links
Monoprice Monolith M15-S: $999
Notes: Product # 35141
| CEA-2010-A Average (40-80Hz) | 119.0 dB |
|---|---|
| Country | United States |
| Dimensions | 23.5"H x 16.7"W x 19.7"D (596.9 x 424.2 x 500.4 mm) |
| Drivers | 15" (381mm) driver |
| Enclosure | sealed |
| Measurement Source | Manufacturer |
| Output SPL at 15 Hz | 100.1 dB |
| Output SPL at 20 Hz | 105.6 dB |
| Output SPL at 25 Hz | 111.2 dB |
| Output SPL at 31.5 Hz | 115.2 dB |
| Output SPL at 40 Hz | 118.4 dB |
| Output SPL at 50 Hz | 119.3 dB |
| Output SPL at 63 Hz | 119.6 dB |
| Output SPL at 80 Hz | 118.9 dB |
| Output SPL at 100 Hz | 119.1 dB |
| Output SPL at 125 Hz | 118.9 dB |
| Warranty | 5 |
| Weight | 80 lbs / 36.3 kg |
- Head-to-Head Comparisons
- Monoprice Monolith M15-S vs Rythmik F18
- Monoprice Monolith M15-S vs Monoprice Monolith M-15 V2
- Monoprice Monolith M15-S vs SVS PB-4000
- Monoprice Monolith M15-S vs HSU Research VTF-3 MK5 HP
- Monoprice Monolith M15-S vs HSU Research VTF-15H MK2
- Monoprice Monolith M15-S vs Rythmik FV15HP
- Monoprice Monolith M15-S vs Monoprice Monolith M-215
- Monoprice Monolith M15-S vs Reaction Audio PV-15X
- See all 15 comparisons
- Links
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Product prices and availability were last checked August 9, 2026 at 6:57 AM UTC 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.