If you specialise in only one category of sound reproduction then you're likely do excel in it. REL only make subwoofers, so their expertise is focused on producing bass only.
From the more compact REL TZero subwoofer which is perfect for the smaller room, to the larger T/9i subwoofer with it's front firing active driver AND down firing passive driver which, you've guessed it... is better suited for the larger rooms.
REL Acoustics have used various inputs on their subwoofers giving you plenty of options for connectivity to an AV receiver, 2 channel amplifier or active speakers. Boasting that their subwoofers can be used for gaming, movies and for the music lover, they really do cater for all requirements and budgets.
Have a look at their HT/1508 predator and you'll see what we mean...