REL Acoustics is taking aim at one of the biggest reasons people avoid subwoofers: placement. The new Planar Series moves the sub off the floor and onto the wall with two thin models, the PL-1 and PL-2, each measuring just 5.7 inches deep and using a mix of active and passive drivers to generate low-frequency output without the usual big black cube parked in the corner like it pays rent. The larger PL-2 uses an 8-inch active woofer with a 10-inch passive radiator, while the smaller PL-1 uses dual 6.5-inch active drivers with the same 10-inch rear passive radiator.
That makes the concept especially interesting for hi-fi and home theater users who want bass support without sacrificing floor space or triggering a domestic zoning dispute. But the idea also raises real questions about installation, wall vibration, apartment and rental use, and whether on-wall bass can deliver the impact and integration REL is known for.
Both units weigh under 50 pounds, making DIY wall mounting a realistic option for users who are comfortable with the installation. REL also offers an optional cart wheel, allowing the Planar models to be moved more easily before final placement or mounting.
Update: In our conversation with a REL representative, we have confirmed a few things. Both REL Planar subwoofers include built-in wireless connectivity and come with an AirShip Direct transmitter module ($399 value). The wireless receiving module is cleverly concealed in the side panel, and swappable should technology change.
A wall-mount is included with purchase, but the cart/wheel/stand will cost extra (price TBD). Wall-mounting is the preferred implementation because it sets the desired wall gap to maximize performance. Alternatively, cart setups for floor placement solve two issues: wall spacing and stability. An included spacer ensures ideal proximity to back wall, while the cart/stand raises the unit off the floor for improved fidelity.
How low can they go? Because the PL-1 and PL-2 are designed for proximity-to-wall or on-wall placement, REL uses that boundary reinforcement to its advantage. The PL-2 is rated down to 24Hz, while the PL-1 reaches 31Hz, both measured at -6dB. That gives the larger model a clear advantage for deeper bass extension, while the smaller model is aimed more at systems where space, placement flexibility, and visual discretion matter just as much as output.
REL Planar Subwoofer Comparison
| PL-2 | PL-1 | |
| Active Drivers | 1 x 8-inch (205mm), FlatPiston active long-throw, steel chassis | 2 x 6.5-inch (165mm), FibreAlloy cone, long-throw, steel chassis |
| Passive Driver | 1 x 10-inch (250mm), FibreAlloy cone, steel chassis | 1 x 10 inch (250mm), FibreAlloy cone, steel chassis |
| Low Frequency Extension* | -6 dB at 24 Hz, in room | -6 dB at 31 Hz, in room |
| Dimensions (W x H x D) | 25.6 x 18.9 x 5.7 in. (650 x 480 x 144mm) | 20.6 x 19.4 x 5.7 in. (522 x 492 x 144mm) |
| Net Weight | 44.6 lbs (20.25 kg) | 41.6 lbs (18.9 kg) |
*Correction (May 6, 2026): A previous version of the article stated Low Frequency Extension was higher at 27 Hz (PL-2) and 38 Hz (PL-1). The corrected numbers are now listed above.
The Bottom Line
REL’s Planar PL-1 and PL-2 are not just “thin subwoofers.” They rethink where a subwoofer can live in a hi-fi or home theater system. With walnut or white grille options, a 5.7-inch-deep cabinet, on-wall placement, active/passive driver designs, and claimed extension down to 24 Hz or 31 Hz depending on model, the Planar Series is clearly aimed at listeners who want real bass support without a large box taking over the room like it won the lease in court.
What we don’t know yet matters: pricing and how they perform in real rooms. Although they can be connected wirelessly, they are not completely cable-free solutions because its power cable still requires a nearby outlet. Custom integrators, however, should have a field day with these. For homeowners building cleaner media rooms, living rooms, or lifestyle-friendly hi-fi systems, REL may have found a smarter way to hide the subwoofer in plain sight.
Price & Availability
REL Acoustics’ all-new Planar PL-1 and PL-2 subwoofers will be available May 20, 2026. However, pricing has yet to be announced. We’ll update this story as soon as it’s released.
For more information: rel.net
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