REL Classic 99 Subwoofer - Walnut

REL Classic 99 Subwoofer Walnut

The REL Classic 99 Subwoofer in Walnut is built for listeners who want more than just bass. It is designed to add depth, scale, warmth and realism to music and movies while preserving the natural character of the main speakers. Combining REL’s long-standing subwoofer expertise with a striking mid-century-inspired cabinet design, the Classic 99 delivers a richer, deeper and more powerful performance than the Classic 98, making it the ideal choice for larger rooms and more capable sound systems.

Created for serious two-channel hi-fi systems and home cinema setups, the Classic 99 produces bass that feels effortless, controlled and highly musical. It delivers the kind of low-frequency foundation that transforms the listening experience, revealing texture, atmosphere and dynamic contrast often hidden in recordings.

Larger Cabinet, Bigger Sound

The REL Classic 99 takes the design philosophy of the Classic series and expands it significantly. With approximately 50% greater cabinet volume than the Classic 98, it is engineered to move more air, produce greater scale and deliver deeper bass extension.

This increased enclosure size allows the subwoofer to energise larger spaces with ease, creating a broader, fuller soundstage while maintaining excellent low-frequency control. The larger internal volume helps improve efficiency, bass depth and overall authority.

Its sealed acoustic suspension cabinet design plays an important role in performance. Unlike ported alternatives, the sealed design offers faster transient response, better timing and tighter bass control, making it particularly effective for music reproduction.

Custom 12-Inch Long Throw Driver

At the centre of the Classic 99 is a specially designed 12-inch down-firing long-throw bass driver, developed specifically for this model.

The cone uses hot-pressed lightweight paper pulp construction, chosen for its excellent balance of stiffness, speed and natural tonal behaviour. REL’s use of a hand-finished centre cap with randomised paper fibres improves self-damping characteristics, reducing unwanted resonances and allowing the driver to return to silence more quickly.

This creates cleaner bass notes, stronger attack and greater clarity, especially during demanding dynamic passages.

Key driver benefits include:

• Faster low-frequency response
• Better tonal texture and realism
• Reduced overhang and distortion
• Improved dynamic impact
• Greater low-frequency authority

The down-firing configuration also helps distribute bass more evenly throughout the room, making placement more forgiving.

450W Class D Amplifier with High Current Delivery

Powering the Classic 99 is a 450-watt Class D amplifier, delivering substantial output with speed, efficiency and control.

REL has used proven amplifier technology refined over thousands of subwoofer builds, ensuring stable performance and excellent reliability. The additional power over the Classic 98 (300W) gives the Classic 99 greater headroom, deeper extension and higher output capability.

This means:

• More impact at higher volumes
• Greater bass control during demanding scenes
• Improved performance in larger rooms
• Better dynamic range

The amplifier is designed to remain composed even under heavy loads, maintaining detail and control across the frequency range.

REL PerfectFilter™ Technology for Deeper Extension

A major advantage of the Classic 99 is REL’s PerfectFilter™ analogue front-end design.

This advanced filter tuning extends usable bass performance into the low 20Hz region, helping the subwoofer reach deeper than many models in its class without sounding artificial or over-emphasised.

PerfectFilter™ improves:

• Bass depth
• Speed
• Tonal integration
• System blending
• Low-frequency realism

This ensures the subwoofer sounds like a natural extension of your speakers rather than a separate bass source.

High-Level Connectivity for Better Integration

REL’s signature High-Level Connection remains one of the Classic 99’s strongest features.

Unlike conventional subwoofer connections, High-Level input takes the same signal feed as your main speakers, allowing the subwoofer to inherit the tonal balance, timing and character of your amplifier.

Benefits include:

• Better musical integration
• More natural bass response
• Improved coherence across the soundstage
• Better stereo imaging

This makes the Classic 99 especially effective in audiophile stereo systems.

For home cinema users, dedicated .1/LFE input ensures powerful low-frequency effects performance from AV receivers.

Precision Crossover and Phase Control

To help achieve seamless integration, the Classic 99 includes adjustable crossover and phase controls.

The crossover dial allows accurate tuning to match your speaker system, ensuring bass blends naturally without overlap or gaps.

The phase switch helps optimise timing alignment between the subwoofer and main speakers, improving bass accuracy and room integration.

These controls make setup simple while giving listeners precise control over performance.

Premium Cabinet Construction

The cabinet itself is a major part of the Classic 99’s performance.

Built using cabinet walls up to 32mm thick, the enclosure is heavily reinforced to reduce vibration and unwanted cabinet resonance.

This provides:

• Cleaner bass reproduction
• Lower distortion
• Better structural rigidity
• Improved acoustic consistency

The heavy construction contributes directly to the subwoofer’s quiet background and dynamic accuracy.

Genuine Walnut Veneer Finish

Finished in real dark walnut veneer, the Classic 99 offers a furniture-grade appearance designed to complement premium interiors.

Its mid-century styling, natural wood grain and minimalist detailing make it visually distinctive, giving it a timeless look that blends naturally into living spaces.

Features include:

• Hand-finished walnut veneer
• Soft radius cabinet edges
• Aluminium detailing
• Precision-machined feet
• Clean grille-free styling

It is designed to look as refined as the system it supports.

Optional REL Wireless Connectivity

For cleaner room layouts and easier placement, the Classic 99 supports REL’s optional wireless systems.

Compatible with:

• REL AirShip II
• REL HT-Air MKII

These wireless systems transmit low-frequency signals at 5.8GHz, maintaining stable, low-latency performance without the clutter of cables.

This gives greater placement flexibility while maintaining sound quality.

REL Classic 99 vs Classic 98

Compared to the Classic 98, the Classic 99 offers significant performance upgrades:

• Larger 12-inch driver (vs 10-inch)
• More amplifier power (450W vs 300W)
• Larger cabinet volume
• Greater bass extension
• Higher output capability
• Better suited for larger rooms

It is the ideal step up for listeners who want more scale, authority and low-frequency depth.

Key Features

• 12-inch long-throw down-firing bass driver
• 450W Class D amplifier
• REL PerfectFilter™ analogue bass tuning
• Sealed acoustic suspension cabinet
• Bass extension into the low 20Hz range
• High-Level speaker input
• Low-Level RCA input
• Dedicated LFE input
• Adjustable crossover control
• Phase adjustment for system alignment
• Thick 32mm cabinet walls
• Premium dark walnut veneer finish
• Optional wireless compatibility
• Mid-century modern styling
• Designed for hi-fi and home cinema systems

The REL Classic 99 Subwoofer Walnut delivers powerful, deep and beautifully controlled bass with the warmth and musicality REL is known for. With its larger driver, more powerful amplifier, advanced filtering and premium cabinet construction, it offers a serious low-frequency upgrade for listeners who want performance, style and long-term reliability in one beautifully engineered design.

REL Classic 99 Subwoofer Specs Sheet

REL Classic 99 Subwoofer User Manual

What's in the Box?

• REL Classic 99 Subwoofer
• 1 x Mains Lead
• 1 x 10m (33’6”) Nominal Neutrik Speakon Cable
• Documentation

Technical Specifications

General

Type	Closed Box, down-firing driver
Active Driver Size and Material	12-inch (305mm) Amended Pulp-on-Paper, Downfiring Inverted Cone, Steel Chassis
Low Frequncy Extension	-6 dB at 24Hz
Input Connectors	High Level Neutrik Speakon   Low Level RCA   LFE RCA
Output Connectors	N/A
Power Output	450 watts (RMS)
Amplifier Type	Class D
Wireless Capability	HT-Air MKII Wireless or AirShip II (Sold separately)
Dual Parametric Filter	N/A
Product Code	CLASSIC 99 WALNUT

Protection System

Fully Electronic Set Safe	Yes
D.C. Fault	Yes
Output Short	Yes
Mains Input Voltage	220-240 volts, 110-120 volts for certain markets
Fuses	4 Amp semi delay 220 volts operation   8 Amp semi delay 120 volts operation
Dimensions (W x H x D)	400mm × 534mm x 350mm (Add 44.5mm in depth when using a High-Level connector)
Net Weight	22.4 kg
Shipping weight	27.1 kg
Finish	Walnut veneer

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