Meet the REL Planar PL-1
The REL Planar PL-1 is an active powered sub-bass system from REL Acoustics, the British specialist that has built its reputation on subwoofers designed to disappear into a full range system. Rather than treating bass as an add-on, REL engineers its subwoofers to move as one with your main speakers, so the low end feels like it was always part of the recording. The Planar PL-1 carries that philosophy into a compact, room-friendly package with an on-board dedicated amplifier and the versatile connection set that REL owners rely on.
How the Planar PL-1 Integrates
High Level connection for music
The heart of REL's approach is the High Level Speakon connection. You take a Neutrik Speakon cable from your power amplifier's speaker terminals and feed that same amplified signal to the Planar PL-1. Because the subwoofer receives the identical signal and tonal character your main speakers are being driven with, the result is a seamless handoff that preserves the voice of your amplifier and loudspeakers. This is why so many two-channel listeners choose REL: the sub does not sound like a separate box, it extends and reinforces what the speakers are already doing.
LFE and .1 input for home theater
The Planar PL-1 also includes a dedicated .1/LFE input, so it slots neatly into a home theater system managed by an AV processor or receiver. Here the subwoofer follows the bass management of your surround system and delivers the low frequency effects channel with authority. Many owners run both connections and switch depending on whether they are enjoying music or a film.
Low level RCA and flexible controls
A low-level RCA input rounds out the connectivity for line-level sources. Setup is handled with continuously variable crossover, gain, and phase controls, which let you dial the Planar PL-1 to your room and your speakers by ear. The continuously variable crossover in particular makes it easy to find the exact point where the sub takes over from your mains, so the transition is smooth rather than lumpy.
Driver and Output Character
Every part of a REL is voiced with a goal in mind, and the Planar PL series is designed to be fast, tuneful, and easy to place. The Planar PL-1 aims for agility and musical timing, the kind of low end that starts and stops cleanly on a plucked bass note and adds weight to a kick drum without smearing the beat. Its on-board dedicated amplifier is matched to the driver so the system behaves as a coherent whole. This is a subwoofer chosen for how it blends and how it keeps time, delivering satisfying depth in real-world rooms while staying tight and controlled.
Room and Speaker Matching
The Planar PL-1 is an excellent partner for bookshelf and stand-mount speakers that need reinforcement below their natural roll-off. Compact monitors like the MoFi SourcePoint 8 and the Spendor A1.2 deliver wonderful midrange and imaging but naturally give up the lowest octaves. Adding the Planar PL-1 via the High Level connection lets those speakers breathe, restoring the foundation while keeping their signature clarity intact.
For placement, start with the sub near a corner or along the front wall, then use the phase and crossover controls to lock it in with your mains. Because the Planar PL-1 is designed to integrate rather than dominate, a little care with gain goes a long way. You want to feel it more than hear it as a separate source. In larger rooms or where you crave more scale, remember that two RELs can be stacked in a line array for greater output and a wider soundstage.
Where the Planar PL-1 Sits in the REL Range
Within the Planar PL series, the PL-1 is the natural starting point, offering REL's integration philosophy in an approachable, agile design. If your room is larger or your appetite for output and low-frequency extension is greater, the REL Planar PL-2 steps up within the same series and can deliver more of everything the PL-1 does well. Both share the same core design goals, so the choice comes down to room size, main speaker demands, and how much headroom you want in reserve.
Completing the Hookup with Wireless and Cables
If running a wired Speakon or LFE cable across the room is impractical, REL's wireless systems can help. The Planar PL-1 is compatible with optional REL wireless, so a module such as the REL HT-Air MKII or the REL Arrow can transmit the signal to the subwoofer without a wired run. A wireless transmitter makes no sound on its own; it serves a specific compatible subwoofer, so confirm the match before you buy.
For the LFE connection in a home theater setup, the REL Commander is a purpose-built cable for feeding the .1 input from your processor. If you prefer to source your subwoofer cabling elsewhere in the AudioQuest family, options like the AudioQuest Boxer, AudioQuest Irish Red, AudioQuest Greyhound, and the balanced AudioQuest Husky (XLR) or single-ended AudioQuest Husky (RCA) give you a range of choices for the line-level and LFE connections. These differ in build and preference; choose the one that suits your run length and system philosophy.
Suggested System Pairings
The Planar PL-1 shines when paired with an amplifier that offers clean speaker terminals for the High Level feed. The Yamaha R-N1000A Network Receiver and the Cambridge Audio EXA100 Integrated Stereo Amplifier both make natural hubs for a two-channel system, driving your main speakers while the REL taps the same signal. For a streamlined active setup, the Cambridge Audio L/R X active streaming speakers can be reinforced through the appropriate REL connection for those seeking a tidy, modern system with added low-end depth.
Frequently Asked Questions
What is the REL Planar PL-1?
The REL Planar PL-1 is an active powered sub-bass system from REL Acoustics, the British specialist that has built its reputation on subwoofers designed to disappear into a full range system. Rather than treating bass as an add-on, REL engineers its subwoofers to move as one with your main speakers, so the low end feels like it was always part of the recording.
What should I match with the REL Planar PL-1?
The Planar PL-1 is an excellent partner for bookshelf and stand-mount speakers that need reinforcement below their natural roll-off. Compact monitors like the MoFi SourcePoint 8 and the Spendor A1.2 deliver wonderful midrange and imaging but naturally give up the lowest octaves. Adding the Planar PL-1 via the High Level connection lets those speakers breathe, restoring the foundation while keeping their signature clarity intact.
Where does the REL Planar PL-1 sit in the range?
Within the Planar PL series, the PL-1 is the natural starting point, offering REL's integration philosophy in an approachable, agile design. If your room is larger or your appetite for output and low-frequency extension is greater, the REL Planar PL-2 steps up within the same series and can deliver more of everything the PL-1 does well.
What cables and connections does the REL Planar PL-1 need?
If running a wired Speakon or LFE cable across the room is impractical, REL's wireless systems can help. The Planar PL-1 is compatible with optional REL wireless, so a module such as the REL HT-Air MKII or the REL Arrow can transmit the signal to the subwoofer without a wired run. A wireless transmitter makes no sound on its own; it serves a specific compatible subwoofer, so confirm the match before you buy.
Arrange a Listen
All Elite Audio is an authorized REL Acoustics dealer with a showroom in Timonium, Maryland. Demo units rotate and not every model is always set up, so we invite you to contact us to arrange a listen or to help match the Planar PL-1 to your speakers and room. We are happy to guide you on connection choices, wireless options, and system pairing so your new REL integrates beautifully from the first note.