Introducing Serie T/i

REL Prefer to refine, to build generationally upon a solid foundation while searching relentlessly for every possible way to legitimately improve upon our past performance. With T/i, we believe we have set a new standard for overall performance in this price category.


REL 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.

T/9i represents the most of T/i that we can deliver, and if sheer output alone is a Ti_9_Black_3_4primary requirement for your theater or music system then read no further. The combination of a lightweight, composite FibreAlloyTM 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.

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.

REL’s acclaimed input filters and robust amplifiers, for T/9i a powerful 300w Class A/B design, result in 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—wherein not simply the bass region but ALL music and movie sound is uplifted and improved.

Great Britain's Premiere Manufacturer of Subwoofers and Sub-Bass Systems

REL are quickly growing into an industry leader in wireless. 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.


T/7i is, without reservation, one of the best-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.Ti_7_Black_Back

The new composite FibreAlloyTM 8″ bass 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 one’s main speakers.

If our driver designers deliver the structure of REL’s sound, the electronics are the power behind our success. T/7i uses a 200w Class A/B design with large, high current power supplies, precision-wound toroidal transformers and an amazing reliability record that has powered almost 100,000 RELS in the T-range over the years.


Simplicity is its own reward and T/5i reduces the classic cubic sub to its bare essence. Just a single, high quality FibreAlloyTM composite driver, down firing to produce maximum coupling with the floor eliminates the need for a grille; T/5i is the purest expression of REL. We began by updating our classic 8″ bass engine to reduce mass, while greatly increasing stiffness.

Ti_5_Black_3_4This improvement led to upgrading cabinet dimensions and wall thickness to better control the deep bass. Additional upgrades extended even into the design of our feet, resulting in greater speed and solidity to the presentation of sound.

REL’s electronics are the brains and power behind our success. Serie T/i uses the same Class A/B power amplifier sections with large, high current power supplies, precision- wound transformers and an amazing reliability record that has powered some 100,000 RELs.

T/5i is powered by a rich sounding 125w Class A/B amplifier that cuts no corners. Over-specified mains transformers, discrete output devices, high current power supplies; T/5i shares all the DNA and quality construction of its larger, more powerful brethren but is simply scaled down in output, not quality and retains the legendary reliability REL have become know for the world over.


Explore Serie T/i



Posted on September 1st, 2015 in News