Short answer: the Harbottle Audio C24 L2. Both are rated 4.4/5 for sound quality (#18 and #20 of 143 subwoofers), and the Harbottle Audio C24 L2 costs $10,078.84 against $17,065 for the Funk Audio Ultra 21.0LX, with sound quality a draw, the lower price decides it.
Buy the Harbottle Audio C24 L2. Both are rated the same for sound quality, and it costs $6,986.16 less than the Funk Audio Ultra 21.0LX.
Still deciding? The full Subwoofers rankings cover every ranked option.
Published CEA-2010 specifications list 116.6 dB at 20 Hz and 126.3 dB through 40-80 Hz.
Funk Audio $17,065 eBay
Published CEA-2010 specifications list 117.0 dB at 20 Hz and 126.6 dB through 40-80 Hz.
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Specifications Side By Side
| Funk Audio Ultra 21.0LX | Harbottle Audio C24 L2 | |
|---|---|---|
| Price | $17,065 | $10,078.84 |
| Ranked | #20 of 143 in Large Home Subwoofers (Over 75 lbs) | #18 of 143 in Large Home Subwoofers (Over 75 lbs) |
| Enclosure | sealed | ported |
| Output SPL at 10 Hz | 99.9 dB | 99.0 dB |
| Output SPL at 12.5 Hz | 102.3 dB | 103.0 dB |
| Output SPL at 15 Hz | 108.4 dB | 110.0 dB |
| Output SPL at 20 Hz | 116.6 dB | 117.0 dB |
| Output SPL at 25 Hz | 120.5 dB | 120.7 dB |
| Output SPL at 31.5 Hz | 121.2 dB | 124.0 dB |
| Output SPL at 40 Hz | 125.0 dB | 126.3 dB |
| Output SPL at 50 Hz | 127.2 dB | 127.3 dB |
| Output SPL at 63 Hz | 126.5 dB | 126.7 dB |
| Output SPL at 80 Hz | 126.6 dB | 126.0 dB |
| Output SPL at 100 Hz | 127.6 dB | 125.0 dB |
| CEA-2010-A Average (40-80Hz) | 126.3 dB | 126.6 dB |
| Dimensions | 25.5”H x 24.5”W x 24”D (647.7 x 622.3 x 609.6 mm) | 35.4”H x 28.4”W x 20.2”D (899.9 x 722.1 x 512.1 mm) |
| Weight | 145.1 lbs (65.8 kg) | 149.9 lbs (68.0 kg) |
| Warranty | 3 | - |
| Cabinet Color | wood, custom | black, white, red, blue |
| Country | Canada | Canada |
| Measurement Source | Manufacturer | Manufacturer |
| Drivers | 21” (533mm) driver | 24” (610mm) driver |
| Inputs | XLR (balanced) | - |
| XLR Input | Yes | - |
| RCA Input | No | - |
| TRS Input | No | - |
| Optical Input | No | - |
| Coaxial Input | No | - |
| USB Input | No | - |
| HDMI Input | No | - |
| AES Input | No | - |
| Aux Input | No | - |
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