Rogersound Labs
RSL Speedwoofer 10S MKII
$499Cheaper
Released 2022
Best Subwoofers · head-to-head
RSL Speedwoofer 10S MKII vs REL T/9x
A sourced, side-by-side comparison. RSL Speedwoofer 10S MKII is cheaper at $499. Every spec and price links to its source.
REL Acoustics
REL T/9x
$1699
Which is better: the RSL Speedwoofer 10S MKII or REL T/9x?
The RSL Speedwoofer 10S MKII 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. The RSL Speedwoofer 10S MKII both leads on specs and costs less — the straightforward pick.
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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 | REL T/9x |
|---|---|---|
| US price | $499 | $1699 |
| Brand | Rogersound Labs | REL Acoustics |
| Released | 2022 | — |
| Driver size (in) | 10 | 10 |
| Amplifier power rms (W) | 400 | 300 |
| Amplifier power peak (W) | 1020 | — |
| Enclosure type | ported | passive-radiator |
| Frequency response (Hz) | 22-200 Hz ±3 dB | — |
| Amplifier class | class-d | class-ab |
| Driver orientation | front-firing | front-firing |
| Room correction | No | No |
| Wireless input | Yes | Yes |
| Dimensions (in) | 15 1/2 x 15 x 15 3/4 | 13.4 x 14.5 x 15.5 |
| Weight (lb) | 40.6 | 45.5 |
Sources — RSL Speedwoofer 10S MKII: rslspeakers.com (verified 2026-07-11). REL T/9x: rel.net (verified 2026-07-11).
What's the difference between the RSL Speedwoofer 10S MKII and REL T/9x?
Where the two actually differ on the specs we track (5 of 11). Matching specs are omitted.
- Amplifier power rms (W): RSL Speedwoofer 10S MKII 400 vs REL T/9x 300
- Enclosure type: RSL Speedwoofer 10S MKII ported vs REL T/9x passive-radiator
- Amplifier class: RSL Speedwoofer 10S MKII class-d vs REL T/9x class-ab
- Dimensions (in): RSL Speedwoofer 10S MKII 15 1/2 x 15 x 15 3/4 vs REL T/9x 13.4 x 14.5 x 15.5
- Weight (lb): RSL Speedwoofer 10S MKII 40.6 vs REL T/9x 45.5