REL T9x 300 Watt Subwoofer - White

REL T/9x Subwoofer – Premium 300W Active Subwoofer for Deep, Fast and Musical Bass - White

Designed as the flagship model in REL’s highly respected T/x Series, the REL T/9x Subwoofer is built to deliver powerful low-frequency performance with the speed, control and refinement that serious music and home cinema systems demand. Combining a high-current 300 Watt Class A/B amplifier, a 10-inch forward-firing active driver and a 10-inch down-firing passive radiator, the T/9x produces deeper, cleaner and more dynamic bass than conventional subwoofers while maintaining the musical integrity REL is known for.

Engineered for listeners who want both cinematic impact and hi-fi precision, the T/9x offers exceptional low-end extension down to 27Hz, making it ideal for larger living rooms, dedicated cinema spaces and premium stereo systems where scale and authority matter.

300 Watt Class A/B Amplifier for Superior Control and Dynamics

At the core of the T/9x is REL’s powerful 300W RMS Class A/B amplifier. Unlike many subwoofers that rely on digital amplification, REL continues to use Class A/B technology because of its natural, fast and controlled delivery.

This amplifier design provides better transient response, allowing bass notes to start and stop instantly without unwanted bloom or overhang. The result is bass that feels tighter, cleaner and better integrated with your main speakers, whether you're listening to detailed acoustic tracks or watching action-packed films.

The amplifier also offers high-current capability, ensuring consistent performance even during demanding low-frequency passages.

Advanced 10-Inch FibreAlloy Active Driver

The T/9x uses a custom-built 10-inch FibreAlloy active driver designed for speed, rigidity and precision. FibreAlloy combines lightweight construction with excellent structural stiffness, allowing the driver to move quickly while resisting distortion under heavy load.

This means bass remains articulate and controlled even at higher volumes, preserving detail in bass guitars, kick drums and deep synthesiser notes while adding physical impact to movie soundtracks.

Its forward-firing design also helps improve room interaction, delivering direct and immediate low-frequency energy.

10-Inch Down-Firing Passive Radiator for Deeper Bass Extension

Supporting the active driver is a 10-inch down-firing passive radiator that increases bass extension and overall output without introducing the turbulence or port noise associated with bass reflex designs.

This passive radiator design allows the T/9x to reach lower frequencies with greater efficiency while maintaining cleaner bass performance. Together, the active and passive drivers create an effective radiating surface equivalent to a much larger 15-inch woofer, giving you deeper, room-filling bass without requiring a larger cabinet.

Extended Frequency Response Down to 27Hz

With low-frequency extension reaching 27Hz, the REL T/9x reproduces deep bass information that many speakers simply cannot reach on their own.

This improves the realism of everything from orchestral music and live recordings to blockbuster movie sound effects, allowing you to hear and feel the full scale of the performance.

The low extension also improves soundstage depth and system balance, making your speakers sound fuller and more complete.

High-Level Connectivity for Better Musical Integration

One of REL’s signature technologies is its high-level connection system, allowing the subwoofer to receive the same signal character as your main amplifier.

This approach helps the T/9x blend more naturally with your main speakers, preserving tonal balance, timing and dynamics for a more seamless listening experience.

For audiophile systems, this makes a major difference in how naturally the sub integrates into the soundstage.

Dedicated Low-Level and LFE Inputs for AV Systems

For home cinema users, the T/9x includes dedicated low-level and LFE inputs for direct AV receiver connection.

The separate LFE input allows the subwoofer to handle dedicated movie effects channels independently, delivering deeper explosions, impact effects and cinematic rumble with greater authority.

Its dual-input flexibility makes it ideal for systems that combine music and home cinema use.

Independent Hi-Fi and Home Cinema Level Controls

A standout feature of the T/9x is its ability to maintain separate level settings for music and movies.

This means you can optimise the subwoofer for subtle, balanced stereo listening while also maintaining higher-impact settings for film playback, removing the need for constant manual adjustments.

It’s an ideal solution for hybrid systems where both performance styles matter.

Reengineered Cabinet Design for Better Acoustic Performance

REL redesigned the T/9x cabinet to increase internal volume for improved bass efficiency while maintaining a stylish, compact footprint.

The gently rounded cabinet edges reduce visual bulk and help improve structural rigidity, reducing cabinet resonance and improving clarity.

This revised enclosure design contributes directly to greater output, improved bass fluidity and cleaner low-frequency reproduction.

Premium White Gloss Finish

Finished in a deep 5-layer White gloss, the T/9x looks every bit as premium as it sounds.

The high-quality lacquer finish, combined with REL’s signature aluminium feet and minimalist styling, ensures it complements modern living spaces and premium AV setups beautifully.

Its premium finish makes it suitable for visible room placement rather than hiding it away.

Optional Wireless Connectivity with REL Arrow Wireless System

For those who want a cleaner installation, the T/9x supports wireless operation via the optional REL Arrow Wireless System.

REL Arrow provides high-quality, zero-compression wireless signal transmission, maintaining sound quality while giving greater flexibility in subwoofer placement.

This is ideal for living rooms where cable routing may be difficult.

Key Features

• 300 Watt RMS Class A/B amplifier
• 10-inch FibreAlloy active bass driver
• 10-inch down-firing passive radiator
• Bass extension down to 27Hz
• High-level input for superior musical integration
• Dedicated low-level and LFE inputs
• Independent music and cinema level controls
• Fast transient response with excellent control
• Reengineered cabinet for improved acoustic volume
• Optional wireless connectivity via REL Arrow
• Premium White gloss finish
• Ideal for hi-fi and home cinema systems

The REL T/9x Subwoofer is built for listeners who want serious bass performance without sacrificing speed, musicality or refinement. Whether enhancing a stereo system or creating a more immersive home cinema setup, it delivers the power, precision and depth needed to transform your listening experience.

What’s in the Box?

• REL T9X Subwoofer, Gloss White
• Mains lead
• Neutrik Speakon (10 metres nominal)
• Interconnect
• User Manual

Technical Specifications

Dimensions

W x H x D	370 x 340 x 393 mm
Net Weight	18.7 kg
Finish	Piano Black Lacquer, Gloss White Lacquer 5 coats

General

Type	Front-firing active driver, down-firing passive
Active driver size & material	10 in. (250mm) long-throw, FibreAlloy™ cone, inverted alloy centre cap, steel chassis
Passive radiator size & material	10 in. (250mm) long-throw, FibreAlloy™ cone, inverted alloy centre cap, steel chassis
Low-frequency extension	-6dB at 27 Hz
Input connectors	High-Level Neutrik Speakon, Low Level (1) RCA, (1) LFE RCA
Output connectors	N/A
Power output	300 watts (RMS)
Amplifier type	Class A/B
Wireless capability	via REL Arrow (sold separately)
Dual parametric filter	N/A

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	3.15 Amp semi delay 230 volts operation, 6.3 Amp semi delay 115 volts operation

REL T9x 300 Watt Subwoofer - White, REL, T9x, 300, Watt, Subwoofer, White, REL ACOUSTICS T9X, t9x, t9x, rel t/9x, T9x-wh