Short answer: the JTR Speakers Orbit Shifter PRO for the higher ranking, the Rythmik F18 for the lower price. The JTR Speakers Orbit Shifter PRO ranks #1 of 97 subwoofers at $4200. The Rythmik F18 ranks #60 at $1850, $2350 cheaper.
The case for the JTR Speakers Orbit Shifter PRO: Dual 18-inch horn-loaded drivers deliver a class-leading 141.3dB CEA-2010-A average, well beyond any other subwoofer tested. The tradeoff: 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 Rythmik F18 if the price matters more than the ranking.
Specifications Side By Side
| JTR Speakers Orbit Shifter PRO | Rythmik F18 | |
|---|---|---|
| Price | $4,200 | $1,850 |
| Ranked | #1 of 97 in Large Powered Home Subwoofers (Over 75 lbs) | #60 of 97 in Large Powered Home Subwoofers (Over 75 lbs) |
| Enclosure | horn | sealed |
| Output SPL at 15 Hz | 95.7 dB | 102.0 dB |
| Output SPL at 20 Hz | 101.9 dB | 106.2 dB |
| Output SPL at 25 Hz | 114.9 dB | 110.9 dB |
| Output SPL at 31.5 Hz | 128.2 dB | 114.3 dB |
| Output SPL at 40 Hz | 136.0 dB | 117.1 dB |
| Output SPL at 50 Hz | 141.0 dB | 119.1 dB |
| Output SPL at 63 Hz | 144.0 dB | 120.5 dB |
| Output SPL at 80 Hz | 144.2 dB | 121.2 dB |
| Output SPL at 100 Hz | 143.4 dB | 121.4 dB |
| Output SPL at 125 Hz | 140.1 dB | 121.4 dB |
| CEA-2010-A Average (40-80Hz) | 141.3 dB | 119.5 dB |
| Dimensions | 45.0"H x 22.5"W x 32.0"D (1143.0 x 571.5 x 812.8 mm) | 20.5"H x 20.5"W x 21.0"D (520.7 x 520.7 x 533.4 mm) |
| Weight | 185 lbs / 83.9 kg | 115.1 lbs / 52.2 kg |
| Warranty | 5 | 5/3 |
| Cabinet Color | black | black |
| Country | United States | United States |
| Measurement Source | Data-bass | Data-bass |
| Drivers | 18" (457mm) driver | 18" (457mm) driver |
| Output SPL at 10 Hz | - | 93.7 dB |
| Output SPL at 12.5 Hz | - | 97.4 dB |
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
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- JTR Speakers Orbit Shifter PRO vs Monoprice Monolith 16 THX Ultra
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- See all 13 comparisons
- Links
Rythmik F18: $1,850
| CEA-2010-A Average (40-80Hz) | 119.5 dB |
|---|---|
| Cabinet Color | black |
| Country | United States |
| Dimensions | 20.5"H x 20.5"W x 21.0"D (520.7 x 520.7 x 533.4 mm) |
| Drivers | 18" (457mm) driver |
| Enclosure | sealed |
| Measurement Source | Data-bass |
| Output SPL at 10 Hz | 93.7 dB |
| Output SPL at 12.5 Hz | 97.4 dB |
| Output SPL at 15 Hz | 102.0 dB |
| Output SPL at 20 Hz | 106.2 dB |
| Output SPL at 25 Hz | 110.9 dB |
| Output SPL at 31.5 Hz | 114.3 dB |
| Output SPL at 40 Hz | 117.1 dB |
| Output SPL at 50 Hz | 119.1 dB |
| Output SPL at 63 Hz | 120.5 dB |
| Output SPL at 80 Hz | 121.2 dB |
| Output SPL at 100 Hz | 121.4 dB |
| Output SPL at 125 Hz | 121.4 dB |
| Warranty | 5/3 |
| Weight | 115.1 lbs / 52.2 kg |
- Head-to-Head Comparisons
- Rythmik F18 vs Monoprice Monolith M15-S
- Rythmik F18 vs Monoprice Monolith M-15 V2
- Rythmik F18 vs SVS PB-4000
- Rythmik F18 vs HSU Research VTF-3 MK5 HP
- Rythmik F18 vs HSU Research VTF-15H MK2
- Rythmik F18 vs Rythmik FV15HP
- Rythmik F18 vs Monoprice Monolith M-215
- Rythmik F18 vs Reaction Audio PV-15X
- See all 13 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.