Modulating scale, while never compromising quality, T/7i provides the speed and punch of the T/9i, scaled to integrate seamlessly with more modest yet still highly sophisticated systems.

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Balance Point

The Perfect Blend

T/7i is, without reservation, one of the most-balanced RELs of all time. In order to achieve perfect balance, a sub must weigh speed against heft, while ensuring true extension-depth-and do so in a physically harmonious package. T/7i manages to make it all seem easy. Quick and delicate for a perfect blend, it can pound out exceptionally deep, tuneful bass that belies its size and plays louder than most will ever require.


Reimagined, Then Reengineered

When we upgraded our drivers, we were forced to redesign outward. The lovely cabinets grew 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


The new composite alloy/fibre engine in T/7i 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 8” active couples with a larger 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.


Brains and Brawn

The Power Behind REL

If our driver designers deliver the structure of REL’s sound, the electronics are the brains and the power behind our success. Serie T/i uses the same Class A/B power amplifier sections with large, high current power supplies, precision-wound toroidal transformers and an amazing reliability record that has powered almost 100,000 RELs. Our proprietary filter designs are responsible for rave reviews for REL’s unique ability to blend seamlessly while layering on all the harmonic structure missing from conventional systems. Standby Mode switch not included on 110V units.


Zero Compression Wireless

Introducing Arrow™

Arrow™ is REL’s latest generation of zero compression wireless. Super-fast delivery of both High Level Bass and .1/ LFE ensures the rich, natural warmth that only RELs can deliver. With a throw distance of some 45’(13.7M) Arrow permits flexible placement without sacrificing sound quality.

Customer Reviews

Based on 22 reviews
Dual sub magic.

Having owned quite a few different subwoofers in av decided to try a pair of rel T7is with my Buchardt S400s. I installed them high level in stereo to my Hegel H190 amplifier I also had shorter custom made high level cables made. After collaboration on each sub I sat back to listen, what can I say fabulous both subs disappearing integrating seamlessly I have since first setting them up moved them in to different positions just to experiment I've found tweaking can be fun I'll probably leave them where they are for now. Just a tip make sure you buy two. 😊.

Re: T/7i recent purchase

Am satisfied customer

Thanx/ Stephn

Very pretty, sub-bass specialist

I am pairing my T/7i with the KEF LS50 passive mini monitors. The T/7i has a very high build quality and a pretty appearance that I bet will last for years.

It is important to note that since the LS50 speakers do not really have a woofer, but just a tweeter inside of a 5.25" midrange driver, there is somewhat of a frequency gap between where the midrange of the LS50 rolls off and where the upper bass of the T/7i rolls off. As a result, I have the crossover on the T/7i turned pretty high, about 3/4 of the way (so between 90-100 Hz) to fill in the gap between the midrange frequencies of the LS50 and the sub-bass of the T/7i. I also have digitally equalized the lowest sub-bass frequencies, 25-40 HZ, down about 9-12 dB because those frequencies of the T/7i were too boomy for my small 10' x 15' room.

There is a good amount of tweaking to be done in order to get the T/7i integrated in with the LS50. I think a pair of speakers with more bass, like the KEF R3, would be easier to integrate with the T/7i. There is no way I would ever run the LS50 without a subwoofer like the T/7i, though.

For a comparison, I turned off the T/7i while playing music and listened to the LS50 by themselves, then turned the T/7i back on, and it really felt like the LS50 became more muscular and authoritative speakers. Play around it with it enough, and the T/7i can make the LS50 punch lower and fuller as if they had woofers. Just watch out for those boomy sub-bass frequencies, the passive 10" down-firing radiator on this thing is no joke.

Seamless sonic integration

Excellent sub pair. The sonic integration is seamless, it feels like it simply extends the frequency response of my S400’s, not calling attention to itself. My previous sub from a well regarded subwoofer online brand would add the bass but not in such an articulate and well integrated way. These REL’s got it. It’s quite magical once setup is accomplished. Setup is not super hard by requires attention. I’ve also customized the high input cable using Canare speaker cable in a shorter length. The rest of the system is all balanced with a Schiit DAC, SS Pre and NC400 monos from Hypex.

Great support crew

I received good support from REL concerning which product to buy and post installation purchase.


Suggested Retail: $999

Modulating scale, while never compromising quality, T/7i provides the speed and punch of the T/9i, scaled to integrate seamlessly with more modest yet still highly sophisticated systems.



Front-firing active driver, down-firing passive

Active Driver Size & Material

8 in., 200mm 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 30 Hz

Input Connectors

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

Output Connectors


Power Output

200 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


2 Amp semi delay 230 volts operation, 4 Amp semi delay 115 volts operation


W x H x D

12 x 14.3 x 15 in. (305 x 362 x 382 mm)

Net Weight

36 lbs. (16.3 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.