REL Planar PL-1 Subwoofer

The REL Planar PL-1 is a wall-mountable subwoofer from REL Acoustics, built to deliver scale, projection, and room-filling energy from a 5.7 inch deep cabinet. Dual 6.5 inch FibreAlloy long-throw active drivers work with a 10 inch FibreAlloy passive radiator, powered by a 300 watt Class D amplifier and reaching down to 31 Hz in-room.

Wireless is built directly into the Planar cabinet with a swappable receiver module designed to evolve as wireless protocols change. The PL-1 sits below the larger PL-2 in REL's new Planar line, sized for smaller rooms, stereo pair installations, and rooms where a slightly more compact footprint matters.

Key Features of the Planar PL-1

• 5.7 inch deep cabinet built for wall mounting, with the option to roll on the matching Planar Cart or place against a wall.
• 300 watt Class D amplifier driving dual 6.5 inch FibreAlloy long-throw active drivers and a 10 inch FibreAlloy passive radiator.
• 31 Hz in-room low frequency extension at minus 6 dB, suited to music and home theater in small to medium rooms.
• Built-in wireless receiver integrated into a swappable side-panel module, compatible with REL's AirShip Direct wireless system (transmitter sold separately).
• High level Neutrik Speakon, low level RCA, and LFE RCA inputs for clean integration into two-channel and multichannel systems.
• Interchangeable cloth and Premium Wood grilles, finished in Piano Black Lacquer or Gloss White Lacquer.
• Wall mount and back-wall spacer included, with the Planar Cart available separately for mobile placement.

The Planar PL-1 Was Built for the Wall

Most subwoofers force a choice between performance and where you can physically put them. Planar starts from the opposite direction. The PL-1 is 5.7 inches deep including mounting hardware, with the cabinet itself sitting closer to 4.5 inches off the wall. That depth lets it disappear into a room the way an on-wall speaker does, alongside in-wall and in-ceiling systems where a traditional floor sub never fit cleanly. Mounting against a boundary also reinforces low frequencies through the room's natural boundary gain, which is part of how the PL-1 reaches 31 Hz from a cabinet this slim.

Dual 6.5 Inch FibreAlloy Active Drivers

The PL-1 uses two 6.5 inch (165 mm) FibreAlloy long-throw active drivers on steel chassis. Splitting the active drive between two smaller cones keeps moving mass low for fast transient response, while the combined cone area handles air movement that a single small driver could not. The 10 inch (250 mm) FibreAlloy passive radiator anchors the bottom octave, allowing the smaller actives to focus on attack and midbass detail. The result is the speed and articulation of a smaller subwoofer with low-end reach that punches well past its compact footprint.

300 Watt Class D Amplifier

The amplifier is a 300 watt Class D module engineered for the slim Planar cabinet. Class D was chosen for its efficiency and compact heat footprint, both critical when the enclosure has no room to spare for traditional heatsinking. The amp drives the dual active drivers and passive radiator with the headroom needed for music and home theater work in small to medium rooms. Output stays composed at depth, with the dynamic reserve to handle peaks without compression.

Built-In Wireless, Designed to Evolve

Planar is the first REL subwoofer with wireless built directly into the cabinet. The receiver module sits in the side panel and is swappable, so future wireless generations can drop in without replacing the subwoofer. The PL-1 is compatible with REL's AirShip Direct wireless system, which removes the need to trail high-level or low-level cables across the room. The transmitter side is sold separately and pairs the source end of your system to the Planar's onboard receiver. For installations where cabling is impractical, this turns the PL-1 into a genuinely wireless subwoofer that still keeps REL's high-level connection philosophy intact.

Inputs for Two-Channel and Cinema

The PL-1 carries the same input set REL uses across the Serie S line. A high level Neutrik Speakon input connects to the speaker outputs of your main amplifier, carrying its full sonic signature for clean blending with the mains. A low level RCA input handles preamp-level connections, and a dedicated LFE RCA input ties into the subwoofer output of a home theater processor. The inputs can run in tandem for systems that handle both music and cinema, so a single PL-1 can serve a stereo setup and a multichannel system without rewiring.

Mount It, Roll It, or Place It

The PL-1 ships with wall-mount hardware and a back-wall spacer for the cleanest possible installation against a boundary. For rooms where wall mounting is not an option, the matching Planar Cart-1 gives the same subwoofer a wheeled floor stand in Piano Black or Gloss White. The cart is sized specifically for the PL-1 and converts a wall-design subwoofer into a mobile floor unit without compromising aesthetics. Both placement modes use the same connectivity and amplification, so there is no performance penalty for picking the configuration that fits the room.

Two Lacquer Finishes and Two Grille Looks

The PL-1 is available in Piano Black Lacquer or Gloss White Lacquer, both finished to the same standard as REL's reference subwoofers. A cloth grille is included and gives the cabinet a discreet, low-profile presence on the wall. For a more deliberate visual statement, the optional Premium Wood Grille drops in over the cloth, with white or black trim matched to the cabinet finish. The grilles are interchangeable on the same cabinet, so the look can change with the room without buying a different subwoofer.

Explore the Full REL Planar Series

The PL-1 is the compact member of REL's two Planar wall-mount subwoofers. Looking for more output for a larger room or a single-sub setup?

• REL Planar PL-2, the larger 5.7 inch deep wall-mount subwoofer with an 8 inch FlatPiston active driver, a 550 watt Class D amplifier, and 24 Hz extension. Suited to medium and larger rooms where output and low-end reach take priority over footprint.

The Listening Room Difference

We're a third-generation family business with a brick-and-mortar showroom in Chestertown, Maryland, and a reputation built on exceptional service and relentless passion for hifi. Whether you're visiting in person or ordering online, we bring decades of experience, personalized service, and honest guidance to every interaction. We don't just ship boxes. We help build systems, answer your questions like real humans, and make sure every detail of your setup is right, from the cables to the final connection. Our passion is helping you get the most out of your gear, with support that lasts well beyond the sale.

REL Planar PL-1 Specifications