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SOLD OUT REL T/9i Subwoofer

The T/i 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.

T/9i delivers more than just raw output. It has thicker cabinet walls and improved bracing to take  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 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—wherein not simply the bass region but ALL music and movie sound is uplifted and improved.


Active Drive Unit  -   10in., 254 mm long-throw, inverted dust cap, steel chassis

Power Output  -   300 Watts (RMS)

Type  -   Passive Radiator, front-fring active woofer, down-firing passive radiator

Lower Frequency Response  -   28 Hz at -6 dB in room

Input Connectors  -   Hi Level Neutrik Speakon, Lo Level single phono, LFE phono

Input Impedance  -   High Level: 150kO, Low Level: 10kO, .1/LFE: 10kO

Gain Control Range  -   80 dB

Phase Switch  -  Yes, 0 or 180 degrees

Amplifier Type  -  Class AB

Wireless Capability  -   Yes - REL Arrow™ wireless system [required], Sold separately

"Protection System  -  Fully Electronic SET-SAFE, D.C. Fault, Output Short"

Fuse  -   3.15 Amp semi delay 230 volts operaton

Dimensions (WHD) Including Feet and Rear Panel Controls  -  13 x 15.2 x 16 in., (330 x 387 x 407 mm)

-  Add 1.75 in (44.5 mm) in depth when using Hi Level connector

Net Weight  -   18.7 kg

Finish  -   Glos Piano Black or White Lacquer

Supplied Accessories  -  Mains Lead,Neutrik Speakon Interconnect  (10 Meters Nominal),User Manual

Mains Lead  -   Yes

Neutrik Speakon Interconnect  (10 Meters Nominal)  -   Yes

User Manual  -   Yes



Musicians place no limits on the bandwidth of the music they play.  In many instances the venue’s “sound” contains some very low frequency information as do harmonics of instruments in the orchestra. 


For pure fidelity to be realized, every part of every note in the music must be reproduced, along with the acoustic signature of the recording space.  The typical home audiophile system, sometimes chosen after hours of agonizing over which components to buy, often suffers bandwidth limitation at the lower end of the reproduction spectrum. This is especially true when playing high bit-rate formats such as 24/96 or 24/192 kHz files. 


Accurate reproduction of low bass is especially important to film sound tracks. Directors and sound engineers rely on very low bass frequencies to impart the power of action sequences, and the sheer drama of subtler scenes. In many cases, huge expenditure is lavished on sound tracks to achieve the desired emotional response in the movie goer. The explosion of high quality sources into homes has given consumers the opportunity to experience the fidelity of wideband multi-channel recording. Every movie soundtrack has a special Low Frequency Effects channel (LFE), where all the really dramatic bass sounds are stored. But without a properly integrated audiophile sub-bass system, bass frequencies, which took hundreds of man-hours and millions to create, will not be reproduced in full.


REL sub-bass systems are optimized to deliver highly accurate, dynamic low bass in film soundtracks. This requires an ability that as of this writing, only RELs possess; the ability to deliver huge low bass originally intended for the main speakers as well as the ability to deliver effects for the .1 channel. 


If one wants to feel the depth charges exploding all around the submarine, one ultimate trick remains up our sleeves. For ultimate spatial coherence, a minimum of 3 RELs (1-main L/R, 1-center, 1-surrounds) may be used to fully realize all the performance embedded in move soundtracks. REL Shotgun unleashes the basic performance possible in a soundtrack. Shotgun 3D™ extends that benefit to all the building blocks of a theater. 


One secret to a REL sub-bass system’s success resides not only in its ability to extract the deepest sounds in the mix, or in its bullet-proof reliability and conspicuous overbuild, it resides in its ability to integrate effortlessly with the main system, enhancing its sound by naturally underpinning the output from the speakers – to make them sound as if they’d doubled in size. 


At REL, we know the secret to a perfectly balanced system is our filter circuits. Evolving over several generations the REL filter circuit is considered a trade secret, To this day, we embed them in a matrix designed to destroy the components hidden within should our competition try to discover the ideal way to crossover. Speed is incredibly important to a sub crossover and so we employ, simple, direct and very fast-acting filters. Based on second order designs, they are intended to allow all the speed and slam of Music to emerge—and importantly, all of the subtlety—while still performing the necessary crossover filtering.


REL sub-bass systems can be “tuned” to your system and room, whatever your system’s capabilities and listening room size. This is of enormous benefit, particularly if like many others, your listening room is not perfect. The REL can be positioned to pressurize your listening room below its lowest eigentone and ensure that those previously missing or masked frequencies are heard cleanly and clearly, no false emphasis or boom – you control its sound in your system. 

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REL T/9i Subwoofer

  • Views: 2096
  • Brand: REL Acoustics
  • Product Code: REL T/9i Subwoofer
  • Availability: SOLD OUT
  • ₹113,321.6
  • Ex Tax: ₹96,035.2