Short answer: the Rythmik FV15HP, if you are buying new. The Harbinger V2218S ranks higher than it (#15 vs #55 of 143 subwoofers, 4.5/5 vs 4.2/5) but is discontinued, so only consider it used; the Rythmik FV15HP is still sold new at $2,127.
What the Rythmik FV15HP does well: A 15 inch ported subwoofer with output matching pricier rivals, plus balanced and RCA inputs for flexible setups. Watch for: Premium price ($2127), ported design room gain dependency, and mid-to-large 114.6 lbs (52 kg) footprint.
The case for the Harbinger V2218S: A pro style 18 inch ported subwoofer with hard hitting upper bass for movie effects and music, relatively light for its output. Watch for: 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.
Buy the Rythmik FV15HP, since the Harbinger V2218S is discontinued and only worth hunting down used.
Looking for alternatives? See the complete Subwoofers rankings.
A 15 inch ported subwoofer with output matching pricier rivals, plus balanced and RCA inputs for flexible setups.
A pro style 18 inch ported subwoofer with hard hitting upper bass for movie effects and music, relatively light for its output.
Prices on this page were last checked October 31, 2026 at 7:11 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.
As an eBay Partner, we may be compensated if you make a purchase.
Specifications Side By Side
| Rythmik FV15HP | Harbinger V2218S | |
|---|---|---|
| Price | $2,127 | $3,495 Discontinued |
| Ranked | #55 of 143 in Large Home Subwoofers (Over 75 lbs) | #15 of 143 in Large Home Subwoofers (Over 75 lbs) |
| Enclosure | ported, front | ported, front |
| Output SPL at 12.5 Hz | 92.8 dB | - |
| Output SPL at 15 Hz | 105.1 dB | - |
| Output SPL at 20 Hz | 111.1 dB | 81.7 dB |
| Output SPL at 25 Hz | 116.1 dB | 99.7 dB |
| Output SPL at 31.5 Hz | 120.0 dB | 118.0 dB |
| Output SPL at 40 Hz | 122.5 dB | 122.8 dB |
| Output SPL at 50 Hz | 122.1 dB | 129.0 dB |
| Output SPL at 63 Hz | 121.8 dB | 132.2 dB |
| Output SPL at 80 Hz | 121.4 dB | 131.7 dB |
| Output SPL at 100 Hz | 121.2 dB | - |
| Output SPL at 125 Hz | 121.1 dB | - |
| CEA-2010-A Average (40-80Hz) | 122.0 dB | 128.9 dB |
| Dimensions | 24.5”H x 18.2”W x 24.2”D (622.3 x 463.5 x 615.9 mm) | 32.5”H x 26.5”W x 29.7”D (825.5 x 673.1 x 754.4 mm) |
| Weight | 115.1 lbs (52.2 kg) | 89.9 lbs (40.8 kg) |
| Warranty | 5/3 | - |
| Cabinet Color | black, white | black |
| Country | United States | United States |
| Measurement Source | Audioholics | Brent Butterworth |
| Drivers | 15” (381mm) driver | 18” (457mm) driver |
| Inputs | XLR (2), RCA (line/LFE) | - |
| XLR Input | Yes | - |
| RCA Input | Yes | - |
| TRS Input | No | - |
| Optical Input | No | - |
| Coaxial Input | No | - |
| USB Input | No | - |
| HDMI Input | No | - |
| AES Input | No | - |
| Aux Input | No | - |
Related Speaker Comparisons
More worthwhile head-to-heads for Harbinger V2218S: