# RSL Speedwoofer 10S MKII vs REL T/9x: specs and price compared

A sourced, side-by-side comparison of the RSL Speedwoofer 10S MKII (Rogersound Labs) and REL T/9x (REL Acoustics) among subwoofers. RSL Speedwoofer 10S MKII is the cheaper of the two at $499.

## Side by side

| 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 |

## Key differences

- 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

## Sources

- RSL Speedwoofer 10S MKII: https://rslspeakers.com/products/rsl-speedwoofer-10s-mkii?country=US (rslspeakers.com, verified 2026-07-11)
- REL T/9x: https://rel.net/products/t-9x (rel.net, verified 2026-07-11)

Canonical: https://frontdeskreview.com/gear/subwoofers/rsl-speedwoofer-10s-mkii-vs-rel-t-9x/
Cite: Per The Front Desk Review, RSL Speedwoofer 10S MKII ($499) vs REL T/9x ($1699) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/subwoofers/rsl-speedwoofer-10s-mkii-vs-rel-t-9x/
License: CC BY 4.0.