REL has a longstanding tradition of requiring the top model in any of its product ranges to offer more than anyone expects, and the incredible-sounding T/9i subwoofer meets such demands. More than the sum of its parts, it represents the grandest scale and highest output within any given technology envelope. 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" passive delivers speed, slam, and attack when called upon. But this do-it-all sub also remains capable of tracing more delicate passages when necessary. Large in sonic scale, T/9i is ideal for mating up with floor-standing speakers and medium-to-large rooms. 

"REL's T/9i is an excellent subwoofer for the audiophile. It's capable of making big bass noises, but is also more than capable of freeing up the loudspeakers and liberating them from the dictatorship of the room. While there is no substitute for huge bass traps and other room treatments, a pair of T/9i get you most of the way there without the domestic angst room treatment can cause. Highly recommended."
– Alan Sircom, Hi-Fi+, April 2017

A Completely Redesigned Flagship: T/9i Fits the Bill
T/9i delivers more than just raw output. It started with driver upgrades and built outward. Due to thicker cabinet walls and improved bracing, the lovely cabinets grew by more than four pounds over its predecessor. Why? Because the additional speed and impact of the new drivers require greater control or the benefits can be lost before they reach the listener.

Great Subs Stem from Great Amps: The Brains Behind the Brawn
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 becomes uplifted and improved.

Specifications:

Type: Front-firing active driver, down-firing passive
Active Driver Size & Material: 10 inch, 250 mm long-throw, FibreAlloy inverted aluminum dust cap, steel chassis, white cone
Passive Radiator Size & Material: 10 inch, 250 mm long-throw, inverted aluminum dust cap, steel chassis, black cone
Low Frequency Extension: -6 dB at 28 Hz
Input Connectors: High Level Neutrik Speakon, Low Level single RCA, LFE RCA
Power Output: 300 watts ( RMS )
Amplifier Type: Class A/B
Wireless Capability: Arrow ( optional ), Zero Compression, Single Large Scale Integrated Chip
Fully Electronic Set Safe: Yes
D.C. Fault: Yes
Output Short: Yes
Mains Input Voltage: 220-240 volts, 110-120 volts for certain markets
Fuses: 3.15 Amp semi delay 230 volts operation, 6.3 Amp semi delay 115 volts operation
Dimensions ( W x H x D ): 13" x 15.2" x 16"
Weight: 41.3 lbs.
Finish: High Gloss Black, High Gloss White, High Gloss Red ( 5 coats )

Shipping weight & dimensions: 48 lbs, 17" x 19" x 20"

Supplied Accessories:

Mains Lead
Neutrik Speakon
Interconnect
User Manual