Rogersound Labs
RSL Speedwoofer 10S MKII
$499Cheaper
Released 2022
Best Subwoofers · head-to-head
RSL Speedwoofer 10S MKII vs KEF KC62
A sourced, side-by-side comparison. RSL Speedwoofer 10S MKII is cheaper at $499. Every spec and price links to its source.
KEF
KEF KC62
$1699.99
Which is better: the RSL Speedwoofer 10S MKII or KEF KC62?
The KEF KC62 wins 1 of the 1 specs we compare head to head; the other wins 0. The RSL Speedwoofer 10S MKII is the cheaper at $499. Get the KEF KC62 for the stronger spec sheet, the RSL Speedwoofer 10S MKII to spend less.
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | RSL Speedwoofer 10S MKII | KEF KC62 |
|---|---|---|
| US price | $499 | $1699.99 |
| Brand | Rogersound Labs | KEF |
| Released | 2022 | — |
| Driver size (in) | 10 | 6.5 |
| Amplifier power rms (W) | 400 | 1000 |
| Amplifier power peak (W) | 1020 | — |
| Enclosure type | ported | — |
| Frequency response (Hz) | 22-200 Hz ±3 dB | 11 to 200 |
| Amplifier class | class-d | class-d |
| Driver orientation | front-firing | — |
| Room correction | No | No |
| Wireless input | Yes | Yes |
| Dimensions (in) | 15 1/2 x 15 x 15 3/4 | 9.7 x 10.1 x 9.8 |
| Weight (lb) | 40.6 | 30.9 |
Sources — RSL Speedwoofer 10S MKII: rslspeakers.com (verified 2026-07-11). KEF KC62: us.kef.com (verified 2026-07-11).
What's the difference between the RSL Speedwoofer 10S MKII and KEF KC62?
Where the two actually differ on the specs we track (5 of 11). Matching specs are omitted.
- Driver size (in): RSL Speedwoofer 10S MKII 10 vs KEF KC62 6.5
- Amplifier power rms (W): RSL Speedwoofer 10S MKII 400 vs KEF KC62 1000
- Frequency response (Hz): RSL Speedwoofer 10S MKII 22-200 Hz ±3 dB vs KEF KC62 11 to 200
- Dimensions (in): RSL Speedwoofer 10S MKII 15 1/2 x 15 x 15 3/4 vs KEF KC62 9.7 x 10.1 x 9.8
- Weight (lb): RSL Speedwoofer 10S MKII 40.6 vs KEF KC62 30.9
What reviewers say
Sourced tester consensus for each — the "what people who used it think" layer, not just specs.
RSL Speedwoofer 10S MKII
No sourced tester review yet.
KEF KC62
Only one whitelisted tester—What Hi-Fi, using Newport Test Labs—published a hands-on, lab-measured review of the KEF KC62. It rates the compact subwoofer highly for powerful, clean, deep bass and easy setup, but flags limited maximum SPL and fiddly custom speaker-level connectors. (1 sourced review, 1 lab-tested.)
Praised: Powerful, clean, deep bass extraordinary for its tiny size; Compact aluminium chassis, easy to position and set up; Measured 106 dB SPL at 1m on an 80Hz tone, 1dB above spec.
Flagged: Limited maximum sound pressure levels / ceiling output; Awkward custom speaker-level connector limits cable gauge.