# Monolith by Monoprice M-12 V2 vs REL T/9x: specs and price compared

A sourced, side-by-side comparison of the Monolith by Monoprice M-12 V2 (Monoprice) and REL T/9x (REL Acoustics) among subwoofers. Monolith by Monoprice M-12 V2 is the cheaper of the two at $849.99.

## Side by side

| Spec | Monolith by Monoprice M-12 V2 | REL T/9x |
| --- | --- | --- |
| US price | $849.99 | $1699 |
| Brand | Monoprice | REL Acoustics |
| Driver size (in) | 12 | 10 |
| Amplifier power rms (W) | 500 | 300 |
| Amplifier power peak (W) | — | — |
| Enclosure type | ported | passive-radiator |
| Frequency response (Hz) | 17-200 | — |
| Amplifier class | class-d | class-ab |
| Driver orientation | — | front-firing |
| Room correction | No | No |
| Wireless input | No | Yes |
| Dimensions (in) | 25.8 x 16.7 x 22.8 | 13.4 x 14.5 x 15.5 |
| Weight (lb) | 98.34 | 45.5 |

## Key differences

- Driver size (in): Monolith by Monoprice M-12 V2 12 vs REL T/9x 10
- Amplifier power rms (W): Monolith by Monoprice M-12 V2 500 vs REL T/9x 300
- Enclosure type: Monolith by Monoprice M-12 V2 ported vs REL T/9x passive-radiator
- Amplifier class: Monolith by Monoprice M-12 V2 class-d vs REL T/9x class-ab
- Wireless input: Monolith by Monoprice M-12 V2 No vs REL T/9x Yes
- Dimensions (in): Monolith by Monoprice M-12 V2 25.8 x 16.7 x 22.8 vs REL T/9x 13.4 x 14.5 x 15.5
- Weight (lb): Monolith by Monoprice M-12 V2 98.34 vs REL T/9x 45.5

## Sources

- Monolith by Monoprice M-12 V2: https://www.monoprice.com/product?p_id=42847 (monoprice.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/monoprice-monolith-m-12-v2-vs-rel-t-9x/
Cite: Per The Front Desk Review, Monolith by Monoprice M-12 V2 ($849.99) vs REL T/9x ($1699) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/subwoofers/monoprice-monolith-m-12-v2-vs-rel-t-9x/
License: CC BY 4.0.