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 29 reviews
Superb sound!

Excellent sound within a beautiful cabinet

Amazed- Holy Cow!!

Just got my product of the T9-i and I am simply stunned at the amount of bass it puts out. I have it paired with an HT-1205 and have ao much head room! So thankful for Best Buy showcasing these products to test out! Thank you REL for producing such a musical subwoofer!!!

Great for music and movies

I have my music and home theater in the same room - sharing same power amp for front channels (thanks Parasound). I was looking for something that would give me the proper bass for movies without too much for my music.

The REL T/9i is the answer.

By hooking up the high-gain connection to my power amp and also the LFE to my Home Theater amp; I have the perfect mix.

I tried the REL, Polk, Speedwoofer and AVS all at the same time - there was a major difference when it came to the audio quality for my 2 channel music listening.

Thank you REL for making amazing products and the in-home trial is wonderful.

Perfect Sub for Music

Not much into writing reviews, but figured it may help someone debating between the T9i and the T7i. Could never find a review directly comparing the two by someone who owned both. I opted for the T7i in my main listening room, but always wondered over the past 2 years if I should of went with the T9i. Taking advantage of the March sale I purchased a T9i, and moved the T7i to the bedroom to pair with my LS50's (match made in heaven). At lower volumes the T7i is more than adequate, but at increased volumes the difference is not subtle! Effortless would probably the best 1 word adjective. On paper 2 additional Hz lower extension and a 10" driver vs 8" might not seem like much difference. Stretch your budget, or save awhile longer - you won't regret it! Specs do not tell the whole story, unless you've heard a REL T series with class A/B amplification using the Neutrik Speakon input you just wouldn't understand and appreciate what they are capable of in a 2 channel system.

Excellent product and service!

Purchased a T9i from Sam at Sevenoaks Sound and Vision in Nottingham, UK after the essential home demo. Sam got Rob Hunt from REL to advise along the way. I received exceptional customer service, far beyond what you normally get, from both so thank you. The T9i is a great product. A Subwoofer was not something I would have considered as my next upgrade as primarily a HiFi enthusiast but what an upgrade! I will be adding a second REL to my system in due course. I highly recommend any Subwoofer sceptical HiFi enthusiast to look into REL. It gives you so much more than just full frequency in your system. I will say no more and just leave you to be gobsmacked by the "REL effect" when you try for yourselves!

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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.



Front-firing active driver, down-firing passive

Active Driver Size & Material

10 in., 250mm long-throw, FibreAlloy™ inverted aluminium dust cap, steel chassis, white cone

Passive Radiator Size & Material

10 in., 250mm long-throw, inverted aluminium dust cap, steel chassis, black cone

Low Frequency Extention

-6dB at 28 Hz

Input Connectors

High Level Neutrik Speakon, Low Level single RCA, LFE RCA

Output Connectors


Power Output

300 watts (RMS)

Amplifier Type

Class A/B

Wireless Capability

Arrow (Optional), Zero Compression Single Large Scale Integrated Chip

Protection System

Fully Electronic Set Safe


D.C. Fault


Output Short


Mains Input Voltage

220-240 volts, 110-120 volts for certain markets


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


W x H x D

13 x 15.2 x 16 in. (330 x 387 x 407 mm)

Net Weight

41.3 lbs. (18.7 kg)


High Gloss Black, High Gloss White, 5 coats

Supplied Accessories

Mains Lead


Neutrik Speakon

Yes (10 Meters Nominal)


Users Manual


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