Harbinger V2218S vs JTR Speakers Captivator 2400ULF

Short answer: the JTR Speakers Captivator 2400ULF, if you are buying new. The Harbinger V2218S ranks higher than it (#15 vs #40 of 109 subwoofers, 4.5/5 vs 4.2/5) but is discontinued, so only consider it used; the JTR Speakers Captivator 2400ULF is still sold new at $3,600.

What the Harbinger V2218S does well: Independent CEA-2010 testing records 81.7 dB at 20 Hz and 128.9 dB through 40-80 Hz. The catch: 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.

What the JTR Speakers Captivator 2400ULF does well: Independent CEA-2010 testing records 115.6 dB at 20 Hz and 122.7 dB through 40-80 Hz. Watch for: The 1041.4H x 520.7W x 571.5D mm cabinet and 74.8 kg mass make this a serious placement and moving commitment.

Buy the JTR Speakers Captivator 2400ULF new; the Harbinger V2218S is no longer sold new, so it only makes sense as a used find.

Still deciding? The full Subwoofers rankings cover every ranked option.

Specifications Side By Side

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Prices on this page were last checked September 30, 2026 at 2:57 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

Harbinger V2218S: $3495 Discontinued eBay

Pros: Independent CEA-2010 testing records 81.7 dB at 20 Hz and 128.9 dB through 40-80 Hz. The ported, front enclosure with 18” (457mm) 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 825.5H x 673.1W x 754.4D mm cabinet and 40.8 kg mass still require deliberate placement and calibration. Discontinued.

Notes: Looks like “PA sub”

Full Harbinger V2218S review and specifications →

CEA-2010-A Average (40-80Hz)	128.9 dB
Cabinet Color	black
Country	United States
Dimensions	32.5”H x 26.5”W x 29.7”D (825.5 x 673.1 x 754.4 mm)
Drivers	18” (457mm) driver
Enclosure	ported, front
Measurement Source	Brent Butterworth
Output SPL at 20 Hz	81.7 dB
Output SPL at 25 Hz	99.7 dB
Output SPL at 31.5 Hz	118.0 dB
Output SPL at 40 Hz	122.8 dB
Output SPL at 50 Hz	129.0 dB
Output SPL at 63 Hz	132.2 dB
Output SPL at 80 Hz	131.7 dB
Weight	89.9 lbs (40.8 kg)

• Links
  • Harbinger V2218S Website
• 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
  • Harbinger V2218S vs Funk Audio Classic 18.0
  • Harbinger V2218S vs JTR Speakers Growler (2015)
  • Harbinger V2218S vs Monoprice Monolith 16 THX Ultra
  • Harbinger V2218S vs Funk Audio Ultra 24.0
  • Harbinger V2218S vs Rythmik FV25HP
  • Harbinger V2218S vs Monoprice Monolith M-215
  • Harbinger V2218S vs JTR Speakers Captivator 1400
  • Harbinger V2218S vs Rythmik FV15HP
  • See all 14 comparisons

JTR Speakers Captivator 2400ULF: $3,600 JTR Speakers eBay

Pros: Independent CEA-2010 testing records 115.6 dB at 20 Hz and 122.7 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 1041.4H x 520.7W x 571.5D mm cabinet and 74.8 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 Captivator 2400ULF review and specifications →

AES Input	No
Aux Input	No
CEA-2010-A Average (40-80Hz)	122.7 dB
Cabinet Color	black, custom
Coaxial Input	No
Country	United States
Dimensions	41”H x 20.5”W x 22.5”D (1041.4 x 520.7 x 571.5 mm)
Drivers	18” (457mm) driver
Enclosure	ported, front
HDMI Input	No
Inputs	XLR, RCA
Measurement Source	Data-bass
Optical Input	No
Output SPL at 10 Hz	104.8 dB
Output SPL at 12.5 Hz	109.0 dB
Output SPL at 15 Hz	112.2 dB
Output SPL at 20 Hz	115.6 dB
Output SPL at 25 Hz	117.9 dB
Output SPL at 31.5 Hz	121.8 dB
Output SPL at 40 Hz	123.3 dB
Output SPL at 50 Hz	123.3 dB
Output SPL at 63 Hz	122.4 dB
Output SPL at 80 Hz	121.6 dB
Output SPL at 100 Hz	121.3 dB
Output SPL at 125 Hz	121.4 dB
RCA Input	Yes
TRS Input	No
USB Input	No
Warranty	5/3
Weight	164.9 lbs (74.8 kg)
XLR Input	Yes

• Links
  • JTR Speakers Captivator 2400ULF 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
  • JTR Speakers Captivator 2400ULF vs Funk Audio Classic 21.0L
  • JTR Speakers Captivator 2400ULF vs HSU Research VTF-3 MK5 HP
  • JTR Speakers Captivator 2400ULF vs Monoprice Monolith 16 THX Ultra
  • JTR Speakers Captivator 2400ULF vs JTR Speakers Captivator S2