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SERIE T/x

T/5x

$799

Surprisingly Deep. Beautifully Discreet. Pure REL Performance.
T/5x delivers expressive, room-filling bass from a compact cabinet that blends effortlessly into any space visually discreet, sonically transformative.

Natural, controlled bass from a 125-watt Class A/B amplifier
Fast, agile performance from an 8" FibreAlloy driver
Reduced resonance through a rigid laminated-plywood cabinet
Low-distortion output supported by internal bracing

Color:White

White
Black

Setup:One Subwoofer

Single Subwoofer
Stereo Pair

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T/5x

Single Subwoofer
White

$799

Designed for Elegance

Perfect for small and medium rooms, T/5x seats perfectly into any décor. Floor-firing is part of its secret; bass energy strikes the floor and spreads uniformly throughout the space making it perform like a larger model. For those picky about style, the hidden bonus is this design eliminates even the grill, rendering it the purest of forms.

Slightly larger in volume than its predecessor, it actually appears to be smaller due subtle design changes to minimize it’s visual presence. Finally, 5 hand polished coats of lacquer in your choice of High Gloss White or Piano Black add luster to the softly rounded cabinetry.

Design

Designed for Elegance

Many don’t realize the intense linkage between performance and design here at REL. Performance is everything to us and so it drives physical design revisions. Our engineers, recognizing the need for greater acoustic volume to achieve the goals of greater fluidity and power, turn to the designer who works dimensions to fool the eye into seeing a smaller, more compact footprint even though cabinet volume increases. Using gently rounded corner radii that allows the eye to flow over and see less visual mass. The result is both modern and familiar with no unnecessary adornment.

Driver

Faster & Deeper

T/5x borrows a single longthrow 8” (200mm) bass engine from its elder sibling, T/7x. Developed using a composite of aluminum and light paper, this cone captures details that will amaze, while supplying sufficient energy to plumb deeper than one would expect for its size. In T/5x, its throw–the ability to play louder–has been increased. Internally, the suspension received numerous upgrades akin to transforming the handling of a car from a family sedan to a true sports car. More power, greater finesse.

Amplifier

Amplified Power

T/5x builds on its predecessor’s reliable, expensive 125 W Class A/B amplifiers. Internally, key items significant to upgrading transparency and speed have been upgraded at no cost to REL’s legendary reliability. Separate inputs for High Level Inputs, Low Level Input (necessary for the increasing number of powered active speakers emerging on the market) allow for a natural, perfect transition from speaker to subwoofer. And in theater a separate, dedicated .1/LFE Input for Theatre performance permits automatic transition between music in high end 2-channel applications and home theater without needing to change a single setting. Magic? No, superior engineering.

Standby Mode switch is only included on 220V units.

Wireless

Zero Compression Wireless

At REL, we’ve developed a sterling reputation for building the finest sounding, fastest wireless systems available in the industry. REL never rely upon digital compression as it results in thin, lifeless sound. Instead, we have perfected an (optional) Arrow Wireless system; so fast and dynamic we’re comfortable encouraging the use of wireless on one channel of a pair of RELs while the other channel may be connected hardwired with cable.

Specifications

Technical Specifications

Type

Closed Box, down-firing driver

Active Driver Size & Material

8 in. (200mm) long-throw, FibreAlloy cone, inverted alloy centre cap, steel chassis

Passive Radiator Size & Material

N/A

Low Frequency Extension

-6dB at 32 Hz Low Frequency

Input Connectors

High Level Neutrik Speakon, Low Level (1) RCA, (1) LFE RCA

Output Connectors

N/A

Power Output

125 watts (RMS)

Amplifier Type

Class A/B

Wireless Capability

REL Arrow (sold separately)

Dual Parametric Filter

N/A

Finish

Piano Black Lacquer, Gloss White Lacquer 5 coats

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

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

Supplied Accessories

Mains Lead

Yes

Neutrik Speakon

Yes (10 Meters Nominal)

Interconnect

User Manual

Yes

In the interest of product development, REL Acoustics Limited reserve the right to vary these specifications without notice.

Dimensions

DIMS

W x H x D
11.8 x 12 x 12.3 in.,
(300 x 307 x 313 mm)

Net Weight

31.5 lbs. (14.3 kg)

Faq

What are the benefits of adding the T/5x to my system?

The REL T/5x delivers fast, clean bass in an ultra-compact form—designed to produce deep, tactile low frequencies with precision. To achieve this, we use an 8" active driver paired with a 125-watt Class A/B amplifier. It integrates seamlessly into stereo systems, enhancing clarity and depth without drawing visual attention, while also adding punch and presence to movie soundtracks.

Is the T/5x good for both music and home theatre systems?

Yes, the T/5x is excellent for both dedicated music systems and mixed-use setups where you enjoy music and movies on the same system. Every model in the T/x line is a dual-purpose subwoofer, meaning you can connect in two ways simultaneously—for music and for movies. This is made possible by a dedicated LFE input with its own volume control, separate from the high- and low-level music inputs and controls.
The T/5x delivers fast, natural bass with depth and authority. For music, it enhances texture, timing, and soundstage; for home theater, it adds weight and realism to every scene—all while preserving the speed and clarity that define REL’s musical approach to low bass.

Can T/5x be integrated with other REL subwoofer series?

Yes, the T/5x can be integrated with other REL models. Th is comes in handy when building a REL 3D set up where you can mix and match differnt models and pair them with differnt sets of speakers in your theater set ups. For stereo paris 2 of the same model is required to achieve the stereo effect In theater setups, it works beautifully alongside other series—such as HT or Serie S- to improve impact, clarity, and balance for realism that is sure to make you smile.

Is the T/5x wireless compatible?

Yes, T/5x is compatible with our Arrow Wireless System equipped with all the same inputs that is found on the rear amp panel. The Arrow provides high-performance wireless operation with zero compression and extremely low latency, making it ideal for subwoofers that a far away from your gear or if you want a clean cable free installation.

What size room is ideal for T/5x?

The T/5x performs best in small rooms, typically between 75 and 200 square feet. Its compact size and tight, responsive bass make it an ideal choice for apartments, bedrooms, or dedicated listening rooms where subtlety and finesse matter more than sheer output. For slightly larger spaces, consider a stereo pair of T/5x units; for much larger rooms, the T/7x or T/9x may be more appropriate.

Can I stack T/5x subwoofers in a line array?

No, the T/5x is not designed for vertical line array stacking, and we strongly advise against it. However, it performs exceptionally well in stereo pair configurations for music or as part of a REL 3D setup. For vertical stacking applications, consider stepping up to the HT/1510 Predator or our Serie S subwoofers.

Awards & Industry Reviews

"When something is good it's easy to describe in my opinion. So, I don't care what descriptor you want to use for sound quality, you can talk about integration, speed, articulation, bass note distinction, textures and so on. This thing is great, it's phenomenal. One of the best"

- Nemo Propaganda

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Audiograde Recommended

“The T/5x is a fabulous little subwoofer that grabs your attention for the sheer musical joy and engagement it brings to music. It represents one of the most effective upgrades I’ve heard to enhancing an audio system’s performance at the price.”

- Audiograde

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"The low end of the Soul 6 is a tad lightweight. I wish it had a little more low end so I popped in the T/5x, played with those controls a bit. 5 minutes and I was in. It transformed the sound of the Soul 6. It made it sound like a bigger speaker."

- The Audiophiliac

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"It's a nice addition to a system that doesn't have full range speakers. When I turn it off now, I miss it immediately."

- iiWi Reviews

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"The T/5x is a fabulous little subwoofer that grabs your attention for the sheer joy and engagement it brings to music."

- Audiograde

Read Article

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View T/5x in Your Space

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What's in the box

Serie T/5x Subwoofer
Grille
6' AC Power Cord
32' Neutrik Speakon cable
User Manual & Warranty Information

Download User Manual Download Brochure

The Right REL for You

Specifications will never tell the whole story behind one of our subwoofers, but they can help to clarify the technical difference between them.

SERIE T

Tzero MKIII

$599

W x H x D
8.5 x 9.5 x 10.5 in.
(216 x 241 x 260 mm)

100 watts (RMS) Class D

N/A

-6dB at 37 Hz Low Frequency

SERIE T/x

T/5x

$799

W x H x D
11.8 x 12 x 12.3 in.,
(300 x 307 x 313 mm)

125 watts (RMS) Class A/B

N/A

-6dB at 32 Hz Low Frequency

SERIE HT

HT/1003 MKII

$699

W x H x D
14.25 in. x 13.25 in. x 15.25 in.
(362 x 343 x 387mm)

300 watts (RMS) Class D

-6dB at 24 Hz Low Frequency

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Overall rating: 4.964602 / 5 from 113 reviews.

AI Generated Review Summary

The T/5x delivers astonishing bass and exceptional sound clarity, praised for its high-quality performance and deep soundstage. Customers also appreciate the excellent customer service and prompt responses.

Summary topics

Sound Clarity Difference: 9%
Musicality and Sound: 7%
Subwoofer Sound and Performance: 21%
Overall Quality and Dynamics: 8%
Customer Service Quality: 7%

Review topics: [].

Review highlights

"Music sounds amazing and the system is fantastically clear and crisp at higher volumes." — David R.
"In short, I came to love the REL experience - the sound, the quality, the look." — Roadsterluver
"Quality products, and quality customer service are both rare these days." — Greg H.

Reviews

A great addition

"Taken delivery of a T5x to compliment my T5i. A fabulous improvement and a subtle bass delivery. Looking forward to really getting to grips with the set up. Advice and support from Ben at REL second to none."

— John G. (5/5)

Serious audiophile subwoofer

"I’ve just started my audio journey with entry level active speakers and was looking for a subwoofer to pair with. At first thought some cheap sub would do it but after some research online and with help of John Hunter’s excellent youtube videos decided to invest more for proper sub. This t5/x has ticked all boxed being superb stylish, excellent connectivity, A/B amp and precision for music bringing all those small details alive. Just happy customer."

— Ken U. (5/5)

Great gym audio upgrade

"Running a a pair of Klipsch RP-600M II with a Fosi Audio BT20a Pro and a Wiim Ultra in my home gym. The T5x blends really well with this setup."

— Seth (5/5)

Pairs well with Magnepan LRS+

"I replaced an older bass reflex sub with the T5x and am very impressed how nicely it blends with the little Maggies! Fast and musical with a lower sounding frequency response than the specs imply. Seamless! Might have to get a second one!"

— Chris P. (5/5)

Perfect pairing with Magnepan LRS

"I love the sound from the LRS+ speakers but one of their shortcomings is the low end, or lack thereof. The REL T5X was recommended online and by a local audio shop with the LRS due to its quick response and ability to seamlessly integrate, without sounding like a separate sub. I initially only purchased one and that was a mistake, but now have a left and right, placed just beside the LRS panels but out of sight. They produce plenty of bass in my small living room. Orchestral works sound fantastic with the realism of the LRS speakers and low end filled in with the T5Xs. This is a match made in heaven and everything I had hoped for."

— David G. (5/5)

Loving the T/5x

"Upgraded the sub; no going back!"

— Gregory B. (5/5)

Center channel sub

"I recently purchased the T5/x to use for my HT center channel. I have a T7/x that I was able to move to my mains and move my HT 1205 to my rear. All 3 make a great improvement in my overall low performance. Love the 3D array from REL."

— Richard F. (5/5)

T/5x Even Better than my old T3

"When the amp in my T3 eventually died I looked back on all the great years of music I'd had with it and wondered what would be the affect of adding the latest model T/5x to the system. Ben at the REL office gave me all the info I needed and after I'd installed this to the system in my small room, knowing that the optimum position was most likely going to be the same along with the crossover and volume setting, the tracks I played sounded even better that before - more agile bass and a more open and detailed sound stage. I wont miss the T3 now, knowing this subwoofer puts over the same fantastic aura, the same grip on the sound but even more so on well recorded discs."

— Christopher S. (5/5)

Stereo Benefits

"Adding a second T/5x to a lounge hifi set up has created a"

— Graham S. (5/5)

Great sound, issue with specing

"I have been proud owner and installer of RELs, starting from owning T Zeros to three of T5s in my home, also installed T7s. . . Kudos for great products. However, I have issue with specs - why is T5 referred as an 8-inch woofer whereas even from outer periphery of cone surrounds it is actually 7. 75-inches. Woofers are generally measured from max height of cone surrounds (in other words inner edge of cone surrounds to an outer edge of the cone surrounds) - and in that case it is a 6. 25-inch woofer and not an 8-inch woofer!"

— Mehul M. (4/5)