Short answer: the RSL Speedwoofer 10S MKII for ported output, the Kef KC62 for sealed compactness. The 10S MKII pairs a 10-inch ported driver with a 400W RMS (1020W peak) XDR amplifier. The KC62 answers with dual 6.5-inch force-canceling drivers and 1000W in an ultra-compact basketball-sized sealed enclosure.
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 RSL (Rogersound Labs) Speedwoofer 10S MKII. It is rated higher for sound quality than the Kef KC62 and costs less, so the other one has nothing left to offer.
Want more options? Browse the full Subwoofers rankings.
Specifications Side By Side
| Kef KC62 | RSL (Rogersound Labs) Speedwoofer 10S MKII | |
|---|---|---|
| Price | $1,699.99 | $450 |
| Ranked | #145 of 145 in Medium Home Subwoofers (30-75 lbs) | #87 of 145 in Medium 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 | 9.7"H x 10.1"W x 9.8"D (245.9 x 255.8 x 247.9 mm) | 15.5"H x 15"W x 15.7"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 | 5/2 |
| Cabinet Color | black, white | black, white |
| Country | United Kingdom | United States |
| Measurement Source | ErinsAudioCorner | Audioholics |
| Amplifier Power | 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 |
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Prices on this page were last checked September 23, 2026 at 11:24 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.
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The Two Speakers In Full
Kef KC62: $1,699.99 Amazon eBay
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.
Full Kef KC62 review and specifications →
| Amplifier Power | 1000W RMS |
|---|---|
| CEA-2010-A Average (40-80Hz) | 96.9 dB |
| Cabinet Color | black, white |
| Country | United Kingdom |
| Dimensions | 9.7"H x 10.1"W x 9.8"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 |
| Warranty | 5/2/5 |
| Weight | 30.9 lbs (14.0 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Independently measured by ErinsAudioCorner; the published figures above come from this ASR subwoofer measurement thread.
- Head-to-Head Comparisons
RSL (Rogersound Labs) Speedwoofer 10S MKII: $450 RSL (Rogersound Labs) eBay
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 $499 price. Wireless receiver built-in.
Full RSL (Rogersound Labs) Speedwoofer 10S MKII review and specifications →
| Amplifier Power | 400W RMS |
|---|---|
| CEA-2010-A Average (40-80Hz) | 112.1 dB |
| Cabinet Color | black, white |
| Country | United States |
| Dimensions | 15.5"H x 15"W x 15.7"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 |
| Warranty | 5/2 |
| Weight | 40.6 lbs (18.4 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Independently measured by Audioholics; the published figures above come from this ASR subwoofer measurement thread.
- Head-to-Head Comparisons
- RSL (Rogersound Labs) Speedwoofer 10S MKII vs Klipsch R-121SW
- RSL (Rogersound Labs) Speedwoofer 10S MKII vs Monitor Audio RXW12
- RSL (Rogersound Labs) Speedwoofer 10S MKII vs Monoprice SSW-10
- RSL (Rogersound Labs) Speedwoofer 10S MKII vs Monoprice Monolith M-10 V2
- RSL (Rogersound Labs) Speedwoofer 10S MKII vs BIC America PL-300
- RSL (Rogersound Labs) Speedwoofer 10S MKII vs SVS PB-1000 PRO
- RSL (Rogersound Labs) Speedwoofer 10S MKII vs SVS SB-2000
- RSL (Rogersound Labs) Speedwoofer 10S MKII vs Power Sound Audio (PSA) XS15SE
- See all 17 comparisons