The Classic 99 subwoofer offers a blend of mid-century modern design and superior audio performance, ideal for larger rooms and advanced systems. Featuring a 12-inch down-firing driver and a 450-watt Class D amplifier, it delivers rich, nuanced sound with deep bass.
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REL Classic 99 Subwoofer

The REL Classic 99 is a premium powered subwoofer designed for listeners who want the warmth and visual character of classic hi-fi combined with the output, control, and reliability of modern REL engineering. Built for higher-performance stereo systems and medium-to-large listening rooms, the Classic 99 pairs a 450-watt RMS Class D amplifier with a bespoke 12-inch down-firing long-stroke pulp-on-paper driver, producing authoritative, room-filling bass while maintaining the speed, texture, and tonal nuance demanded by music. Its closed-box acoustic suspension design reaches down to 24Hz at -6 dB in-room, while REL's all-analog PerfectFilter front end helps maintain useful output into the low-20Hz region. 

The Classic 99 is equally distinctive visually. Its substantial cabinet uses walls up to 32 mm thick, finished in genuine walnut veneer and complemented by natural aluminum badging, solid billet feet, and white-gold-finished rear controls. The understated mid-century-modern styling allows the subwoofer to function as both a high-performance audio component and a refined piece of furniture.

What It's Good At:

• High-performance music reproduction: Adds deep, tuneful bass while preserving timing, tonal balance, imaging, and low-level musical detail.
• Filling medium-to-large rooms: The 12-inch long-stroke driver and 450-watt amplifier provide substantial output and deeper extension for larger listening spaces.
• Seamless speaker integration: REL's High Level connection and Natural RollOff approach allow the subwoofer to follow the sonic character of the main amplifier and speakers.
• Music and home theater versatility: Dedicated .1/LFE connectivity can operate alongside the High Level input for both stereo listening and cinematic low-frequency effects.
• Premium living-space aesthetics: Genuine walnut veneer, thick cabinet construction, aluminum detailing, and solid billet feet create an elegant mid-century-inspired appearance.
• Flexible wired or wireless installation: Multiple analog inputs plus compatibility with REL AirShip II and HT-Air MKII wireless systems accommodate a wide range of system configurations.

REL Classic 99 Subwoofer Full Specifications:

• Product: REL Classic 99
• Product Type: Powered sub-bass system / subwoofer
• Enclosure Type: Closed box / acoustic suspension
• Driver Orientation: Down-firing
• Active Driver: 12 in. (305 mm) amended pulp-on-paper driver
• Driver Construction: Down-firing inverted cone, steel chassis
• Cone Material: Lightweight, hot-pressed paper
• Passive Radiator: None
• Low-Frequency Extension: -6 dB at 24Hz in-room
• Amplifier Power: 450 watts RMS
• Amplifier Type: Class D
• Gain Control Range: 80 dB
• Crossover Range: Variable from 30Hz to 120Hz for High Level and Low Level inputs
• Phase Control: 0° or 180°
• .1/LFE Level Control: Independent LFE output-level adjustment
• Low Level Input: RCA
• LFE Input: RCA dedicated .1/LFE
• Simultaneous Inputs: High Level and .1/LFE inputs can be used simultaneously
• Wireless Compatibility: REL HT-Air MKII or AirShip II, sold separately
• Wireless Frequency: 5.8GHz with compatible REL wireless systems
• Wireless Range: Up to approximately 35 ft with compatible REL wireless systems
• Protection System: Fully electronic Set-Safe
• D.C. Fault Protection: Yes
• Output Short Protection: Yes
• Thermal Overload Protection: Yes
• Standby Activation: After approximately 30 minutes without detected audio activity
• Mains Voltage Selector: 120V / 230V
• Cabinet Wall Thickness: Up to 32 mm
• Finish: Genuine walnut veneer
• Badging: Natural aluminum
• Feet: Softly radiused feet milled from solid billet
• Dimensions, W × H × D: 15.75 × 21.0 × 13.8 in.
• Metric Dimensions: 400 × 534 × 350 mm
• Net Weight: 49.3 lb. (22.4 kg)
• Shipping Weight: 59.7 lb. (27.1 kg)
• Finish: Walnut veneer
• Recommended Room Size: Approximately 150-400 sq. ft. (14-37 m²)
• Stereo Pair Configuration: Supported
• Vertical Line Array Stacking: Not designed for vertical line-array stacking
• Supplied Mains Lead: Yes
• AC Power Cord: Product box contents list a 6 ft power cord
• Supplied Neutrik Speakon High Level Interconnect: 10 m (33 ft. 6 in.) nominal
• User Manual: Included

REL Classic 99 Subwoofer Q&A:

What makes the REL Classic 99 a strong choice for a high-end stereo system?

The Classic 99 combines a 450-watt Class D amplifier, a bespoke 12-inch down-firing driver, and REL's High Level connection to produce deep bass while preserving the timing and tonal character of the main audio system. Its 24Hz in-room extension, strong dynamic capability, and refined low-level detail make it especially well suited to music-focused systems and larger listening spaces.

Can the REL Classic 99 be used for both music and home theater?

Yes. The Classic 99 is particularly focused on musical performance, but its dedicated .1/LFE RCA input also provides powerful low-frequency effects for movies. High Level and .1/LFE connections may be used simultaneously, allowing one subwoofer to support the main speakers during stereo playback and reproduce the dedicated LFE channel during home theater use.

Can the Classic 99 be used with other REL subwoofers?

Yes. It can be integrated with other REL models when the system is carefully positioned and calibrated, although similarly voiced models generally make integration easier. For the most consistent imaging and bass distribution, a matching pair of Classic 99 subwoofers is an especially effective option.

Does the REL Classic 99 support wireless operation?

Yes, with an optional REL wireless accessory. The Classic 99 is compatible with AirShip II and HT-Air MKII, both sold separately; AirShip II supports REL High Level and .1/LFE operation, while HT-Air MKII supports Low Level or .1/LFE connectivity.

What room sizes are best suited to the Classic 99?

The Classic 99 is intended for capable systems and medium-to-large rooms, with approximately 150 to 400 square feet being a suitable range. Its 12-inch driver, larger cabinet, and 450-watt amplifier give it the ability to create substantial low-frequency energy without sacrificing musical refinement.

Can REL Classic 99 subwoofers be vertically stacked in a line array?

No. The Classic 99 is designed primarily for conventional floor placement rather than vertical line-array stacking. For greater output and more even bass distribution, two Classic 99 units can instead be configured as a stereo pair.

What connections are available on the REL Classic 99?

The Classic 99 provides a High Level Neutrik Speakon input, Low Level RCA input, and dedicated .1/LFE RCA input. Its High Level connection is particularly useful in traditional stereo systems because it receives the same amplifier signal feeding the main speakers, helping the subwoofer integrate naturally with the system's tonal character.

How low does the REL Classic 99 play?

The specified in-room low-frequency extension is -6 dB at 24Hz. Its all-analog PerfectFilter circuitry also helps maintain useful output into the low-20Hz region, giving music and movie soundtracks greater depth, scale, and physical presence.

REL Classic 99 Subwoofer Downloads: