REL Acoustics Planar PL-1 Subwoofer
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Product Overview & Specifications
The REL Planar PL-1 is an ultra-thin, high-performance subwoofer engineered for small-to-medium rooms where traditional floor-standing subwoofers are visually intrusive or spatially impractical. Designed to leverage boundary effect coupling, the PL-1 can be mounted directly on-wall or positioned close to boundary walls using an optional cart, delivering articulate low-frequency extension down to 31 Hz (-6 dB) from a chassis only 5.7 inches (144 mm) deep.
Driven by a 300-Watt RMS Pure Class D amplifier, the PL-1 houses dual front-firing 6.5-inch FibreAlloy long-throw drivers paired with a rear-firing 10-inch passive radiator featuring over 45mm of excursion. Utilizing REL’s all-analog PerfectFilter circuitry and high-level Neutrik SpeakOn input connection, the subwoofer integrates with main speakers without digital latency. Each unit features built-in Airship Direct wireless technology, utilizing a pre-paired receiver concealed within a rear compartment for cable-free installation.
KEY FEATURES & PROPRIETARY TECHNOLOGIES
- Ultra-Thin Boundary-Coupled Design: Engineered for on-wall or near-wall placement, utilizing rear-wall boundary effect coupling to reinforce deep bass from a slim-profile cabinet.
- Dual 6.5" FibreAlloy Active Drivers: Twin front-firing 6.5" FibreAlloy long-throw drivers built on steel chassis deliver fast dynamics and low-distortion transient response.
- 10" Rear-Firing Passive Radiator: Specially tuned 10" passive radiator with >45mm excursion fires toward the wall to expand low-frequency output and room integration.
- 300W Pure Class D Amplifier: Efficient, high-current Class D power module conservatively rated at 300W RMS for cool-running, effortless dynamic delivery.
- All-Analog PerfectFilter Circuitry: Fully analog input filters preserve timing, phase coherence, and tonal balance without analog-to-digital conversion latency.
- Integrated Airship Direct Wireless: Built-in, factory pre-paired wireless receiver housed in a concealed rear-panel compartment for uncompressed, zero-latency wireless signal transmission.
- Flexible High-Level & LFE Connectivity: Features REL's High-Level Neutrik SpeakOn connection alongside standard Low-Level RCA and dedicated LFE RCA inputs.
SPECIFICATIONS
| Product Type | Ultra-Thin On-Wall / Near-Wall Powered Subwoofer |
| Active Driver Configuration | 2 x 6.5" (165 mm) Front-Firing FibreAlloy Cone Drivers, Long-Throw, Steel Chassis |
| Passive Radiator Configuration | 1 x 10" (250 mm) Rear-Firing FibreAlloy Passive Radiator, Steel Chassis (>45 mm Excursion) |
| Amplifier Type & Power Output | Pure Class D Amplifier | 300 Watts RMS |
| Low Frequency Extension | -6 dB @ 31 Hz (In-Room) |
| Input Connectors | HIGH-LEVEL Neutrik SpeakOn, LOW-LEVEL Single RCA, LFE Single RCA |
| Wireless Integration | Built-in Airship Direct Wireless Technology (Factory Pre-Paired Module) |
| Filtering & Processing | All-Analog PerfectFilter Circuitry |
| Electronic Protection | Fully Electronic Set Safe, D.C. Fault, Output Short Protection |
| Mains Input Voltage | 100–240 V AC Selectable (Fuse: 2.5A @ 230V / 5A @ 120V) |
| Finish Options | Gloss Piano Black Lacquer or Gloss White Lacquer |
| Cabinet Dimensions (W x H x D) | 522 x 492 x 144 mm (20.6" x 19.4" x 5.7") *Add 39 mm (1.5") depth when using on-wall bracket |
| Net Weight | 18.9 kg (41.6 lbs) |
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REL Acoustics Planar PL-1 Subwoofer
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