HSU Research VTF-15H MK2 vs Rythmik F18

Last updated: August 9, 2026

Short answer: the HSU Research VTF-15H MK2. It ranks #41 of 97 subwoofers at $1499; the Rythmik F18 ranks #60 and costs $1850, so there is not much of a tradeoff to weigh.

On the HSU Research VTF-15H MK2 side: 15-inch ported driver delivers 121.8dB CEA-2010-A average from HSU Research’s long-running VTF series. The catch: Ported enclosure prone to room modes at certain frequencies, mid-large 50 kg size, and $1,500 price point.

Buy the HSU Research VTF-15H MK2 if the ranking matters more than the price. Buy the Rythmik F18 if the price matters more than the ranking.

Specifications Side By Side

HSU Research VTF-15H MK2 Rythmik F18
Price$1,499$1,850
Ranked#41 of 97 in Large Powered Home Subwoofers (Over 75 lbs)#60 of 97 in Large Powered Home Subwoofers (Over 75 lbs)
Enclosureported, frontsealed
Output SPL at 15 Hz101.6 dB102.0 dB
Output SPL at 20 Hz108.4 dB106.2 dB
Output SPL at 25 Hz114.8 dB110.9 dB
Output SPL at 31.5 Hz119.4 dB114.3 dB
Output SPL at 40 Hz122.9 dB117.1 dB
Output SPL at 50 Hz122.5 dB119.1 dB
Output SPL at 63 Hz121.1 dB120.5 dB
Output SPL at 80 Hz120.5 dB121.2 dB
CEA-2010-A Average (40-80Hz)121.8 dB119.5 dB
Dimensions24.0"H x 18.0"W x 26.0"D (609.6 x 457.2 x 660.4 mm)20.5"H x 20.5"W x 21.0"D (520.7 x 520.7 x 533.4 mm)
Weight110 lbs / 49.9 kg115.1 lbs / 52.2 kg
Warranty7/2(+3)5/3
Cabinet Colorblack, woodblack
CountryUnited StatesUnited States
Measurement SourceManufacturerData-bass
Drivers15" (381mm) driver18" (457mm) driver
Output SPL at 10 Hz-93.7 dB
Output SPL at 12.5 Hz-97.4 dB
Output SPL at 100 Hz-121.4 dB
Output SPL at 125 Hz-121.4 dB

The Two Speakers In Full

HSU Research VTF-15H MK2: $1,499

HSU Research VTF-15H MK2 ranking card

Pros: 15-inch ported driver delivers 121.8dB CEA-2010-A average from HSU Research’s long-running VTF series.

Cons: Ported enclosure prone to room modes at certain frequencies, mid-large 50 kg size, and $1,500 price point.

Notes: Price includes shipping

CEA-2010-A Average (40-80Hz)121.8 dB
Cabinet Colorblack, wood
CountryUnited States
Dimensions24.0"H x 18.0"W x 26.0"D (609.6 x 457.2 x 660.4 mm)
Drivers15" (381mm) driver
Enclosureported, front
Measurement SourceManufacturer
Output SPL at 15 Hz101.6 dB
Output SPL at 20 Hz108.4 dB
Output SPL at 25 Hz114.8 dB
Output SPL at 31.5 Hz119.4 dB
Output SPL at 40 Hz122.9 dB
Output SPL at 50 Hz122.5 dB
Output SPL at 63 Hz121.1 dB
Output SPL at 80 Hz120.5 dB
Warranty7/2(+3)
Weight110 lbs / 49.9 kg

Rythmik F18: $1,850

Rythmik F18 ranking card

CEA-2010-A Average (40-80Hz)119.5 dB
Cabinet Colorblack
CountryUnited States
Dimensions20.5"H x 20.5"W x 21.0"D (520.7 x 520.7 x 533.4 mm)
Drivers18" (457mm) driver
Enclosuresealed
Measurement SourceData-bass
Output SPL at 10 Hz93.7 dB
Output SPL at 12.5 Hz97.4 dB
Output SPL at 15 Hz102.0 dB
Output SPL at 20 Hz106.2 dB
Output SPL at 25 Hz110.9 dB
Output SPL at 31.5 Hz114.3 dB
Output SPL at 40 Hz117.1 dB
Output SPL at 50 Hz119.1 dB
Output SPL at 63 Hz120.5 dB
Output SPL at 80 Hz121.2 dB
Output SPL at 100 Hz121.4 dB
Output SPL at 125 Hz121.4 dB
Warranty5/3
Weight115.1 lbs / 52.2 kg

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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.