REL Acoustics No.35 Reference Subwoofer

Extraordinary Speed. Effortless Scale.

The REL Acoustics No.35 is a high-performance active subwoofer from the flagship Reference Series, engineered to deliver exceptional bass depth, speed, dynamics, and precision for premium stereo and home theater systems. Featuring a newly redesigned 12-inch 12K Pure Carbon Fibre driver and a powerful 900-watt RMS Class AB/D amplifier, the No.35 combines impressive output with refined musical detail and effortless control. Its Dual Parametric EQ enables precise room tuning, while REL's renowned High Level Connection ensures seamless integration with the main loudspeakers. Designed for single-subwoofer, stereo-pair, and Reference Line Array configurations, the No.35 delivers reference-level bass performance in a more compact cabinet than the larger No.36.

Key Features

• 12-inch 12K Pure Carbon Fibre Driver:
  Features a comprehensively redesigned 305 mm long-throw driver with a fine 12K carbon fibre weave, inverted carbon fibre centre cap, and die-cast alloy chassis. The advanced cone construction improves rigidity and self-damping for greater clarity, detail, and control at high output levels.
• 900-Watt RMS Class AB/D Amplifier:
  Combines the high-current delivery of a traditional Class A/B power supply with the speed and efficiency of a Class D output stage. A substantial 17-pound toroidal transformer provides the current reserves needed for powerful, dynamic, and controlled bass reproduction.
• Deep Bass Extension to 17 Hz:
  Delivers low-frequency extension to -6 dB at 17 Hz in-room, providing a solid foundation for music and cinematic soundtracks while retaining the speed and definition expected from REL Reference products.
• Advanced Long-Throw Driver Architecture:
  A redesigned cast-aluminum frame, suspension, and surround allow an additional 12 mm of travel in each direction compared with the previous No.31 driver, supporting greater output while maintaining accurate cone control.
• Dual Parametric EQ:
  Provides two bands of parametric equalization for precise room and system optimization. The controls help address room resonances and excessive upper-bass energy for cleaner bass and smoother integration with the main speakers.
• REL High Level Connection:
  Uses a Neutrik SpeakOn input to connect to the main amplifier, helping the subwoofer integrate naturally with the tonal character and timing of the primary loudspeakers in high-end two-channel systems.
• Comprehensive Stereo and Home Theater Connectivity:
  Includes high-level, stereo low-level RCA and XLR, and dedicated LFE RCA and XLR inputs. High-level and LFE signals can be used simultaneously, allowing the No.35 to serve both music and home theater systems.
• Optional AirShip Direct Wireless Connectivity:
  Supports REL AirShip Direct for wireless transmission of high-level and LFE signals without digital compression, offering flexible installation without long signal cables.
• Reference Line Array Compatibility:
  Retains the exact cabinet dimensions of the REL No.31, allowing owners to incorporate the No.35 into existing Reference Line Arrays with earlier No.31 models. Multiple subwoofers can be configured as a single unit, stereo pair, or vertical array.
• Reference Remote Control:
  Allows adjustments to high-level or low-level gain, crossover, LFE gain, phase, and Dual Parametric EQ from the listening position. Settings can be locked after setup to prevent accidental changes.
• Premium Curvilinear Cabinet Design:
  Features sculpted cabinet curves inspired by classic wooden runabouts, extensive internal bracing, a shaped grille, and a luxurious piano black finish with 12 coats of hand-rubbed lacquer.
• Electronic Protection System:
  Incorporates REL's Fully Electronic Set-Safe system, DC fault protection, and output short-circuit protection for dependable operation.

Feature Highlights

• 12-inch 12K Pure Carbon Fibre long-throw driver with an advanced suspension system.
• 900-watt RMS Class AB/D amplifier with a high-current toroidal power supply.
• Low-frequency extension to -6 dB at 17 Hz in-room.
• Dual Parametric EQ for precise room correction and system integration.
• High Level, stereo RCA/XLR, and LFE RCA/XLR connectivity.
• Optional AirShip Direct wireless connectivity without digital compression.
• Compatible with single, stereo-pair, and Reference Line Array configurations.
• Premium piano black lacquer cabinet with 12 coats of hand-rubbed lacquer.

Technical Specifications

• Product Type:
  Active subwoofer, REL Reference Series.
• Enclosure Type:
  Closed-box design with a front-firing active driver.
• Active Driver:
  12 inches (305 mm) long-throw Pure Carbon Fibre cone with inverted carbon fibre centre cap and die-cast alloy chassis.
• Passive Radiator:
  Not applicable.
• Low-Frequency Extension:
  -6 dB at 17 Hz in-room.
• Amplifier Power Output:
  900 watts RMS.
• Amplifier Type:
  Class AB/D.
• High-Level Input:
  Neutrik SpeakOn.
• Low-Level Inputs:
  Stereo RCA and stereo XLR.
• LFE Inputs:
  RCA and XLR.
• Outputs:
  Neutrik SpeakOn high-level output, LFE RCA, LFE XLR, line-level RCA, and line-level XLR.
• Gain Control Range:
  80 dB.
• Wireless Connectivity:
  Compatible with optional REL AirShip Direct.
• Equalization:
  Dual Parametric EQ.
• Remote Control:
  REL Reference Remote with gain, crossover, LFE gain, phase, and Dual Parametric EQ adjustments.
• Finish:
  Piano Black Lacquer, finished with 12 coats of hand-rubbed lacquer.
• Power Supply Voltage:
  220–240 V or 110–120 V, depending on market version.
• Fuse Rating:
  8 A semi-delay fuse for 230 V operation; 15 A semi-delay fuse for 115 V operation.
• Dimensions (W × H × D):
  638 × 435 × 724 mm.
• Net Weight:
  59 kg.
• Shipping Dimensions (W × H × D):
  933 × 681 × 870 mm.
• Shipping Weight:
  Approximately 78.25 kg.
• Included Accessories:
  AC power cable, 10 m Neutrik SpeakOn cable, grille, Reference Remote, two AAA batteries, user manual, and warranty information.

• Download REL Acoustics No.35 Product Brochure (PDF)