Short answer: the RSL (Rogersound Labs) Speedwoofer 10S MKII. It ranks #66 of 137 subwoofers at $450; the Kef KC62 ranks #137 and costs $1519.99, so there is not much of a tradeoff to weigh.
On the Kef KC62 side: Dual 6.5-inch force-canceling drivers with 1000W in ultra-compact basketball-sized sealed enclosure.
The case for the RSL (Rogersound Labs) Speedwoofer 10S MKII: 10-inch ported with 400W RMS (1020W peak) XDR amplifier.
Buy the Kef KC62 if the price matters more than the ranking. Buy the RSL (Rogersound Labs) Speedwoofer 10S MKII if the ranking matters more than the price.
Specifications Side By Side
| Kef KC62 | RSL (Rogersound Labs) Speedwoofer 10S MKII | |
|---|---|---|
| Price | $1,519.99 | $450 |
| Ranked | #137 of 137 in Medium Powered Home Subwoofers (30-75 lbs) | #66 of 137 in Medium Powered Home Subwoofers (30-75 lbs) |
| Enclosure | sealed | ported, rear |
| Output SPL at 20 Hz | 80.0 dB | 100.0 dB |
| Output SPL at 25 Hz | 84.6 dB | 105.0 dB |
| Output SPL at 31.5 Hz | 88.5 dB | 107.7 dB |
| Output SPL at 40 Hz | 92.2 dB | 110.3 dB |
| Output SPL at 50 Hz | 95.1 dB | 112.9 dB |
| Output SPL at 63 Hz | 97.7 dB | 113.0 dB |
| Output SPL at 80 Hz | 102.6 dB | 112.1 dB |
| Output SPL at 100 Hz | 104.2 dB | 111.4 dB |
| CEA-2010-A Average (40-80Hz) | 96.9 dB | 112.1 dB |
| Dimensions | 9.68"H x 10.07"W x 9.76"D (245.9 x 255.8 x 247.9 mm) | 15.5"H x 15.0"W x 15.75"D (393.7 x 381.0 x 400.0 mm) |
| Weight | 30.9 lbs / 14.0 kg | 40.6 lbs / 18.4 kg |
| Warranty | 5/2/5 | ? |
| Cabinet Color | black, white | black, white |
| Country | United Kingdom | United States |
| Measurement Source | ErinsAudioCorner | Audioholics |
| Power Output (Watts) | 1000W RMS | 400W RMS |
| Frequency Response | 11-200Hz | 21-200Hz |
| Drivers | 2x 6.5" (165mm) driver | 10" (254mm) driver |
| Output SPL at 15 Hz | - | 89.0 dB |
| Output SPL at 125 Hz | - | 110.7 dB |
The Two Speakers In Full
Kef KC62: $1,519.99 Amazon
Pros: Dual 6.5-inch force-canceling drivers with 1000W in ultra-compact basketball-sized sealed enclosure. Deep extension to 11Hz with five room placement EQ presets. Elegant design fits any décor.
| CEA-2010-A Average (40-80Hz) | 96.9 dB |
|---|---|
| Cabinet Color | black, white |
| Country | United Kingdom |
| Dimensions | 9.68"H x 10.07"W x 9.76"D (245.9 x 255.8 x 247.9 mm) |
| Drivers | 2x 6.5" (165mm) driver |
| Enclosure | sealed |
| Frequency Response | 11-200Hz |
| Measurement Source | ErinsAudioCorner |
| Output SPL at 20 Hz | 80.0 dB |
| Output SPL at 25 Hz | 84.6 dB |
| Output SPL at 31.5 Hz | 88.5 dB |
| Output SPL at 40 Hz | 92.2 dB |
| Output SPL at 50 Hz | 95.1 dB |
| Output SPL at 63 Hz | 97.7 dB |
| Output SPL at 80 Hz | 102.6 dB |
| Output SPL at 100 Hz | 104.2 dB |
| Power Output (Watts) | 1000W RMS |
| Warranty | 5/2/5 |
| Weight | 30.9 lbs / 14.0 kg |
- Head-to-Head Comparisons
- Links
RSL (Rogersound Labs) Speedwoofer 10S MKII: $450
Pros: 10-inch ported with 400W RMS (1020W peak) XDR amplifier. DSP with dual modes (LFE mode for 22Hz extension, Music mode for tight response). Quick tight musical bass at excellent $449 price. Wireless receiver built-in.
| CEA-2010-A Average (40-80Hz) | 112.1 dB |
|---|---|
| Cabinet Color | black, white |
| Country | United States |
| Dimensions | 15.5"H x 15.0"W x 15.75"D (393.7 x 381.0 x 400.0 mm) |
| Drivers | 10" (254mm) driver |
| Enclosure | ported, rear |
| Frequency Response | 21-200Hz |
| Measurement Source | Audioholics |
| Output SPL at 15 Hz | 89.0 dB |
| Output SPL at 20 Hz | 100.0 dB |
| Output SPL at 25 Hz | 105.0 dB |
| Output SPL at 31.5 Hz | 107.7 dB |
| Output SPL at 40 Hz | 110.3 dB |
| Output SPL at 50 Hz | 112.9 dB |
| Output SPL at 63 Hz | 113.0 dB |
| Output SPL at 80 Hz | 112.1 dB |
| Output SPL at 100 Hz | 111.4 dB |
| Output SPL at 125 Hz | 110.7 dB |
| Power Output (Watts) | 400W RMS |
| Warranty | ? |
| Weight | 40.6 lbs / 18.4 kg |
- Head-to-Head Comparisons
- RSL (Rogersound Labs) Speedwoofer 10S MKII vs SVS SB-2000
- RSL (Rogersound Labs) Speedwoofer 10S MKII vs Klipsch R-121SW
- RSL (Rogersound Labs) Speedwoofer 10S MKII vs Rythmik F12
- RSL (Rogersound Labs) Speedwoofer 10S MKII vs Monoprice Monolith M-10 V2
- RSL (Rogersound Labs) Speedwoofer 10S MKII vs Monoprice SW-12
- RSL (Rogersound Labs) Speedwoofer 10S MKII vs Monoprice SSW-10
- RSL (Rogersound Labs) Speedwoofer 10S MKII vs SVS PB-1000 PRO
- RSL (Rogersound Labs) Speedwoofer 10S MKII vs SVS SB-3000
- See all 12 comparisons
- Links
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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.