JTR Speakers Captivator RS1 vs Rythmik FV15HP

Last updated: September 8, 2026

Short answer: the Rythmik FV15HP. It ranks #39 of 97 subwoofers by sound quality at $1770; the JTR Speakers Captivator RS1 ranks #40 and costs $3300, so there is little reason to consider the other one.

What the JTR Speakers Captivator RS1 offers: Independent CEA-2010 testing records 111.1 dB at 20 Hz and 121.8 dB through 40-80 Hz. The sealed enclosure with 18” (457mm) driver has the headroom for demanding film bass in a large room. Watch for: The 533.4H x 533.4W x 457.2D mm cabinet and 53.1 kg mass make this a serious placement and moving commitment. A sealed cabinet still needs careful placement and calibration to avoid room-mode peaks.

What the Rythmik FV15HP offers: 15-inch ported driver reaches 122.0dB CEA-2010-A average, matching the output of subwoofers costing significantly more. Watch for: Premium price ($1,770), ported design room gain dependency, and mid-to-large 52 kg footprint.

Buy the Rythmik FV15HP. It ranks higher for sound quality than the JTR Speakers Captivator RS1 and costs less, which settles it without a real tradeoff to make.

JTR Speakers Captivator RS1 vs Rythmik FV15HP

Specifications Side By Side

JTR Speakers Captivator RS1 Rythmik FV15HP
Price$3,300$1,770
Ranked#40 of 97 in Large Powered Home Subwoofers (Over 75 lbs)#39 of 97 in Large Powered Home Subwoofers (Over 75 lbs)
Enclosuresealedported, front
Output SPL at 10 Hz96.1 dB-
Output SPL at 12.5 Hz100.1 dB92.8 dB
Output SPL at 15 Hz105.4 dB105.1 dB
Output SPL at 20 Hz111.1 dB111.1 dB
Output SPL at 25 Hz115.5 dB116.1 dB
Output SPL at 31.5 Hz119.6 dB120.0 dB
Output SPL at 40 Hz121.3 dB122.5 dB
Output SPL at 50 Hz122.0 dB122.1 dB
Output SPL at 63 Hz122.1 dB121.8 dB
Output SPL at 80 Hz121.9 dB121.4 dB
Output SPL at 100 Hz121.9 dB121.2 dB
Output SPL at 125 Hz121.9 dB121.1 dB
CEA-2010-A Average (40-80Hz)121.8 dB122.0 dB
Dimensions21"H x 21"W x 18"D (533.4 x 533.4 x 457.2 mm)24.5"H x 18.2"W x 24.2"D (622.3 x 463.5 x 615.9 mm)
Weight117.1 lbs / 53.1 kg115.1 lbs / 52.2 kg
Warranty5/35/3
Cabinet Colorblackblack, white
CountryUnited StatesUnited States
Measurement SourceAudioholicsAudioholics
Drivers18" (457mm) driver15" (381mm) driver

More useful head-to-heads from the same speaker class:

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

JTR Speakers Captivator RS1: $3,300 eBay

JTR Speakers Captivator RS1 ranking card

Pros: Independent CEA-2010 testing records 111.1 dB at 20 Hz and 121.8 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 533.4H x 533.4W x 457.2D mm cabinet and 53.1 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 JTR Speakers Captivator RS1 review and specifications →

CEA-2010-A Average (40-80Hz)121.8 dB
Cabinet Colorblack
CountryUnited States
Dimensions21"H x 21"W x 18"D (533.4 x 533.4 x 457.2 mm)
Drivers18" (457mm) driver
Enclosuresealed
Measurement SourceAudioholics
Output SPL at 10 Hz96.1 dB
Output SPL at 12.5 Hz100.1 dB
Output SPL at 15 Hz105.4 dB
Output SPL at 20 Hz111.1 dB
Output SPL at 25 Hz115.5 dB
Output SPL at 31.5 Hz119.6 dB
Output SPL at 40 Hz121.3 dB
Output SPL at 50 Hz122.0 dB
Output SPL at 63 Hz122.1 dB
Output SPL at 80 Hz121.9 dB
Output SPL at 100 Hz121.9 dB
Output SPL at 125 Hz121.9 dB
Warranty5/3
Weight117.1 lbs / 53.1 kg
Search eBay for JTR Speakers Captivator RS1 →

Rythmik FV15HP: $1,770 eBay

Rythmik FV15HP ranking card

Pros: 15-inch ported driver reaches 122.0dB CEA-2010-A average, matching the output of subwoofers costing significantly more.

Cons: Premium price ($1,770), ported design room gain dependency, and mid-to-large 52 kg footprint.

Full Rythmik FV15HP review and specifications →

CEA-2010-A Average (40-80Hz)122.0 dB
Cabinet Colorblack, white
CountryUnited States
Dimensions24.5"H x 18.2"W x 24.2"D (622.3 x 463.5 x 615.9 mm)
Drivers15" (381mm) driver
Enclosureported, front
Measurement SourceAudioholics
Output SPL at 12.5 Hz92.8 dB
Output SPL at 15 Hz105.1 dB
Output SPL at 20 Hz111.1 dB
Output SPL at 25 Hz116.1 dB
Output SPL at 31.5 Hz120.0 dB
Output SPL at 40 Hz122.5 dB
Output SPL at 50 Hz122.1 dB
Output SPL at 63 Hz121.8 dB
Output SPL at 80 Hz121.4 dB
Output SPL at 100 Hz121.2 dB
Output SPL at 125 Hz121.1 dB
Warranty5/3
Weight115.1 lbs / 52.2 kg
Search eBay for Rythmik FV15HP →