Focal Sub One Dual 8" Studio Subwoofer
- Dual 8 inch Slatefiber woofers
- 32Hz to 120Hz frequency range
- 200W RMS Class D amplifier
- 114dB SPL peak at 1m
- LFE plus left and right inputs, linkable outputs
- Low-pass, high-pass, phase and polarity controls
- Low-profile wide cabinet with front vents
Last refreshed Jun 20, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A studio subwoofer for mixing rooms that need controlled low end matched to existing monitors, with full crossover and phase controls. Cabinet dimensions and weight are not listed, so measure the space first.
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ASIN: B09S2XKX7XCategory: Subwoofers
Overview
Twin Slatefiber woofers driven by a Class D amplifier produce the low end in this Focal studio subwoofer. Signal enters through LFE or left and right inputs, passes adjustable high-pass and low-pass filters, and continues to the main monitors, with link outputs for adding more subs.
Bass management is where this sub earns its desk space: crossover, phase and polarity controls let it blend with nearby monitors instead of booming over them. Front venting and a low, wide cabinet suit placement against a wall. Weight, dimensions and included cables go unlisted.
Who it's for
Engineers and producers checking low end at a desk or near a wall get a sub built to integrate with monitors through a proper crossover. Home theater listeners wanting wireless pairing or a remote are not the target.
Pros and cons
- Two woofers in a slim cabinet
- Adjustable low-pass and high-pass filters
- Phase and polarity controls for alignment
- LFE input for surround work
- Dimensions and weight not listed
- No wireless connection mentioned
- Upper limit stops at 120Hz
Performance notes
Output comes from two woofers sharing one amplifier, so deep notes reach down without pushing a single cone hard. How well it blends depends on the crossover and phase settings matched to the monitors and the listening position. Placement near a wall adds bass, which the filter settings can then trim.
Specifications
| Brand | Focal |
|---|---|
| Dimensions & fit | |
| Woofer Diameter | Dual 8 inch |
| Capacity & performance | |
| Speaker Maximum Output Power | 200W RMS |
| Outputs | Left and right with link |
| Other details | |
| Frequency Response | 32Hz to 120Hz |
| Audio Driver Type | Slatefiber |
| Max spl | 114dB peak at 1m |
| Amplifier type | Class D |
| Low pass filter | Adjustable |
| Inputs | LFE, left and right |
| High pass filter | Adjustable |
| Phase control | Phase and polarity |
| Port type | Front vents |
Frequently asked questions
Can I connect more than one Focal Sub One?
Yes. The outputs have link capability for multiple subs.
Does the Focal Sub One have a crossover for my monitors?
Yes. It has adjustable low-pass and high-pass settings plus phase and polarity, so the monitors and sub can be matched.
Is the Focal Sub One a home theater subwoofer?
It is built for studio mixing and mastering. It has an LFE input, but no wireless link or remote is listed.