Short answer: the Funk Audio Custom 21.0. It ranks #10 of 97 subwoofers at $6061.91; the Harbottle Audio C24 L2 ranks #12 and costs $10078.84, so there is not much of a tradeoff to weigh.
Buy the Funk Audio Custom 21.0 if the ranking matters more than the price. Buy the Harbottle Audio C24 L2 if the price matters more than the ranking.
Specifications Side By Side
| Funk Audio Custom 21.0 | Harbottle Audio C24 L2 | |
|---|---|---|
| Price | $6,061.91 | $10,078.84 |
| Ranked | #10 of 97 in Large Powered Home Subwoofers (Over 75 lbs) | #12 of 97 in Large Powered Home Subwoofers (Over 75 lbs) |
| Enclosure | sealed | ported |
| Output SPL at 10 Hz | 97.4 dB | 99.0 dB |
| Output SPL at 12.5 Hz | 101.1 dB | 103.0 dB |
| Output SPL at 15 Hz | 105.7 dB | 110.0 dB |
| Output SPL at 20 Hz | 109.8 dB | 117.0 dB |
| Output SPL at 25 Hz | 114.2 dB | 120.7 dB |
| Output SPL at 31.5 Hz | 120.4 dB | 124.0 dB |
| Output SPL at 40 Hz | 124.1 dB | 126.3 dB |
| Output SPL at 50 Hz | 126.8 dB | 127.3 dB |
| Output SPL at 63 Hz | 129.0 dB | 126.7 dB |
| Output SPL at 80 Hz | 131.0 dB | 126.0 dB |
| Output SPL at 100 Hz | 132.6 dB | 125.0 dB |
| Output SPL at 125 Hz | 133.0 dB | - |
| CEA-2010-A Average (40-80Hz) | 127.7 dB | 126.6 dB |
| Dimensions | 22.75"H x 22.25"W x 20.5"D (577.9 x 565.1 x 520.7 mm) | 35.43"H x 28.43"W x 20.16"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 | Data-bass | Manufacturer |
| Drivers | 21" (533mm) driver | 24" (610mm) driver |
The Two Speakers In Full
Funk Audio Custom 21.0: $6,061.91
Notes: Data-bass labeled this sub as ‘FW21.0’, but original name is 21.0
| CEA-2010-A Average (40-80Hz) | 127.7 dB |
|---|---|
| Cabinet Color | wood, custom |
| Country | Canada |
| Dimensions | 22.75"H x 22.25"W x 20.5"D (577.9 x 565.1 x 520.7 mm) |
| Drivers | 21" (533mm) driver |
| Enclosure | sealed |
| Measurement Source | Data-bass |
| Output SPL at 10 Hz | 97.4 dB |
| Output SPL at 12.5 Hz | 101.1 dB |
| Output SPL at 15 Hz | 105.7 dB |
| Output SPL at 20 Hz | 109.8 dB |
| Output SPL at 25 Hz | 114.2 dB |
| Output SPL at 31.5 Hz | 120.4 dB |
| Output SPL at 40 Hz | 124.1 dB |
| Output SPL at 50 Hz | 126.8 dB |
| Output SPL at 63 Hz | 129.0 dB |
| Output SPL at 80 Hz | 131.0 dB |
| Output SPL at 100 Hz | 132.6 dB |
| Output SPL at 125 Hz | 133.0 dB |
| Warranty | 3 |
| Weight | 145.1 lbs / 65.8 kg |
- Head-to-Head Comparisons
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Harbottle Audio C24 L2: $10,078.84
| CEA-2010-A Average (40-80Hz) | 126.6 dB |
|---|---|
| Cabinet Color | black, white, red, blue |
| Country | Canada |
| Dimensions | 35.43"H x 28.43"W x 20.16"D (899.9 x 722.1 x 512.1 mm) |
| Drivers | 24" (610mm) driver |
| Enclosure | ported |
| Measurement Source | Manufacturer |
| Output SPL at 10 Hz | 99.0 dB |
| Output SPL at 12.5 Hz | 103.0 dB |
| Output SPL at 15 Hz | 110.0 dB |
| Output SPL at 20 Hz | 117.0 dB |
| Output SPL at 25 Hz | 120.7 dB |
| Output SPL at 31.5 Hz | 124.0 dB |
| Output SPL at 40 Hz | 126.3 dB |
| Output SPL at 50 Hz | 127.3 dB |
| Output SPL at 63 Hz | 126.7 dB |
| Output SPL at 80 Hz | 126.0 dB |
| Output SPL at 100 Hz | 125.0 dB |
| Weight | 149.9 lbs / 68.0 kg |
- Head-to-Head Comparisons
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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.