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We have a longstanding tradition of requiring the top model in any range to be more. More than the sum of its parts, it represents the grandest scale, the highest output and the most we can do within any given technology envelope.

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The Most T/i Available

The Series Flagship

T/9i represents the most of T/i that we can deliver, and if sheer output alone is a primary requirement for your theater or music system then read no further. The combination of a lightweight, composite 10” driver coupled to a matching 10” T/i passive delivers speed, slam and attack when called upon but also is capable of tracing more delicate passages when necessary. Large in sonic scale, the T/9i is ideal for mating up with floor standing speakers and rooms that are on the medium-to-large size. Powerful, concussive, yet beautiful.


Reimagined, Then Reengineered

A completely redesigned flagship

T/9i delivers more than just raw output. We started with our driver upgrades and built outward. The lovely cabinets grew by 4 lbs. (1.8 kg) over its predecessor due to thicker cabinet walls and improved bracing. Why? Because the additional speed and impact of the new drivers requires greater control or the benefits can be lost before they get to the listener.


Outsized Performance

Innovative Alloy/Fibre Bass Engines

The new composite alloy/fibre engine in T/9i blends precisely the correct dimension of stiffening alloy with a fibre material chosen for its sonic neutrality and light weight. The combination is brilliant; exceeding the performance of competitors’ drivers that are many times more expensive. The forward-firing 10” active couples with a 10” down-firing passive, again with carefully chosen balances of alloy to fibre and the result is seamless, effortlessly deep bass that blends perfectly with the main speakers.


Great Subs, Great Amps

The Brains Behind the Brawn

Our acclaimed input filters and robust amplifiers result in some of the best sounding, most reliable designs ever produced. High current power supplies, huge toroidal transformers, and what many critics call the best filters in the world produce the famous REL Effect—where in not simply the bass region but ALL music and movie sound is uplifted and improved.

Standby Mode switch not included on 110V units.


Zero Compression Wireless

Introducing Arrow™

Following on the heels of the acclaimed LongBow™ Wireless, Arrow delivers much of the promise and connectivity of hardwired RELs with the placement flexibility and pure cool factor of great wireless for all of T/i. For a reasonable sum, Arrow gives you the ability to place subs in distant corners, along glass walls, or on hardwood floors where a cable would otherwise destroy the effect.

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Customer Reviews

Based on 115 reviews
T/9i Awesome Subwoofer with great sound and beautiful cabinet

This is the third REL subwoofer that I purchased for my system. They are a great sub for music and theater that has a beautiful cabinet. The subs have great rich sound, are very complementary and enhance the other speakers, fill out the entire room with a warm, full sound. When watching action movies, they add great depth to the sound of the action. Rel has great tools online to help match the Rel subs with your speakers, help with placement and provide subwoofer recommendations for music and theater. Again, a great product with wonderful sound and overall excellent customer experience.

Great sounding sub

This is my second one so I run two for 2 channel Stereo. For my room which is pretty live, thr 7i's are more than enough subwoofer. They provide great low bass as well as add tight punchy bass when the music calls for it.


Beautiful piece inside and out - who would expect both from a subwoofer? By utilizing the high level input with the supplied cable, the T/9i maintains all the characteristics of the silver cabling to my amp but essentially ignores the amp's incoming wattage. Once the .1 and high levels were tweaked, the REL became sonically invisible while providing a lush, solid and satisfying deep end. But instead of hiding it in a corner - I proudly placed it front and center between the speakers where it can most easily be admired.


Sounds awesome and we haven't even tuned it yet.
The first 24 hour burn in was light on the volume and bass demand, but even with that very revealing. We new we had a good sub right away.
Can't wait to see where it takes us once we tune it with the room!

New Listening Experience

Running a single T/9i with a pair of 1990 Nelson-Reed 8-02B floor standing speakers. Really transforms our system. Bass is much more dynamic, tight and defined. Set up videos and FAQs on the website are very good. We are happy we went with the REL.

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Suggested Retail: $1,299

We have a longstanding tradition of requiring the top model in any range to be more. More than the sum of its parts, it represents the grandest scale, the highest output and the most we can do within any given technology envelope.

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