JTR Speakers Orbit Shifter LFU vs Rythmik F18

Short answer: the JTR Speakers Orbit Shifter LFU for better sound quality, the Rythmik F18 for the lower price. The JTR Speakers Orbit Shifter LFU ranks #2 of 110 subwoofers, rated 4.6/5, at $6995. The Rythmik F18 ranks #69, rated 4.1/5, at $2344, $4651 cheaper.

Buy the JTR Speakers Orbit Shifter LFU if sound quality matters more than the price. Buy the Rythmik F18 if the price matters more than sound quality.

Want more options? Browse the full Subwoofers rankings.

Specifications Side By Side

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Prices on this page were last checked September 23, 2026 at 11:24 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

JTR Speakers Orbit Shifter LFU: $6995 eBay

Pros: Independent CEA-2010 testing records 118.6 dB at 20 Hz and 133.8 dB through 40-80 Hz. The ported, front enclosure with 18” (457mm) driver has the headroom for demanding film bass in a large room.

Cons: The 571.5H x 1270.0W x 914.4D mm cabinet and 80.3 kg mass make this a serious placement and moving commitment. Ported output does not solve room modes, so careful placement and calibration remain essential.

Full JTR Speakers Orbit Shifter LFU review and specifications →

CEA-2010-A Average (40-80Hz)	133.8 dB
Country	United States
Dimensions	22.5"H x 50"W x 36"D (571.5 x 1270.0 x 914.4 mm)
Drivers	18" (457mm) driver
Enclosure	ported, front
Measurement Source	Data-bass
Output SPL at 12.5 Hz	96.5 dB
Output SPL at 15 Hz	104.5 dB
Output SPL at 20 Hz	118.6 dB
Output SPL at 25 Hz	125.5 dB
Output SPL at 31.5 Hz	128.0 dB
Output SPL at 40 Hz	131.1 dB
Output SPL at 50 Hz	132.1 dB
Output SPL at 63 Hz	134.4 dB
Output SPL at 80 Hz	137.8 dB
Output SPL at 100 Hz	139.7 dB
Output SPL at 125 Hz	138.0 dB
Warranty	5 years
Weight	177 lbs (80.3 kg)

• Reviews, Comparisons and Sound Samples
  • Independently measured by Data-bass; the published figures above come from this ASR subwoofer measurement thread.
• Head-to-Head Comparisons
  • JTR Speakers Orbit Shifter LFU vs JTR Speakers Orbit Shifter PRO
  • JTR Speakers Orbit Shifter LFU vs Power Sound Audio (PSA) TRIAX
  • JTR Speakers Orbit Shifter LFU vs JTR Speakers Captivator 4000ULF
  • JTR Speakers Orbit Shifter LFU vs JTR Speakers Captivator S2
  • JTR Speakers Orbit Shifter LFU vs Monoprice Monolith 16 THX Ultra
  • JTR Speakers Orbit Shifter LFU vs Reaction Audio PV-15X
  • JTR Speakers Orbit Shifter LFU vs Monoprice Monolith M-215
  • JTR Speakers Orbit Shifter LFU vs Rythmik FV15HP
  • See all 13 comparisons

Rythmik F18: $1,850 Rythmik Audio eBay

Pros: Independent CEA-2010 testing records 106.2 dB at 20 Hz and 119.5 dB through 40-80 Hz. The sealed enclosure with 18” (457mm) driver has the headroom for demanding film bass in a large room.

Cons: The 520.7H x 520.7W x 533.4D mm cabinet and 52.2 kg mass make this a serious placement and moving commitment. A sealed cabinet still needs careful placement and calibration to avoid room-mode peaks.

Full Rythmik F18 review and specifications →

AES Input	No
Aux Input	No
CEA-2010-A Average (40-80Hz)	119.5 dB
Cabinet Color	black
Coaxial Input	No
Country	United States
Dimensions	20.5"H x 20.5"W x 21"D (520.7 x 520.7 x 533.4 mm)
Drivers	18" (457mm) driver
Enclosure	sealed
HDMI Input	No
Inputs	XLR (2), RCA (line/LFE)
Measurement Source	Data-bass
Optical Input	No
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
RCA Input	Yes
TRS Input	No
USB Input	No
Warranty	5/3
Weight	115.1 lbs (52.2 kg)
XLR Input	Yes

• Links
  • Rythmik F18 Website
• Reviews, Comparisons and Sound Samples
  • Independently measured by Data-bass; the published figures above come from this ASR subwoofer measurement thread.
• Head-to-Head Comparisons
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