Product Description

Serie T/x

REL Acoustics T/x Series Subwoofer including T/9x, T/7x and T/5x.

Beyond Convention - Sound Beyond Their Size

We prefer to refine, to build generationally upon a solid foundation while searching relentlessly for every possible way to legitimately improve upon our past performance.

Serie T/x is instantly seen as crisper, fresher, a full upgrade. Faster, more transparent sounding system performance awaits you with higher output levels and greater impact.

Our goals were not simply to improve upon its illustrious predecessor, but to deliver as much as possible of our latest Serie S on a budget.

T/x represents a new standard for overall performance in this cost category with upgraded drivers, cabinets, amps, and even zero-compression wireless capability when paired with our Arrow wireless system.

Our Story: We make subwoofers. That’s it. Nothing else. No distractions. Nothing to steal our focus. No kidding ourselves that we can be good at everything. No trying to conquer the whole world. We just do our best to conquer our bit of it. From the beginning this has been a labor of love, born from a desire for a more perfect sound experience. It began with one man’s dissatisfaction with the performance of subwoofers available at the time. That search for better, that pursuit of perfect sound remains the driving force behind REL. It has persisted through changes in ownership, it has driven massive advancements in technology and innovations in designs. Turning loose the power, the drama and the fun that lies within great music and movies.

Our Purpose: Each day we come in to work in pursuit of only one intention, to produce the most raw, perfect, pure sound possible, to capture the raw intention of the artist. We use the best quality materials, employ the most exacting construction requirements. We think of the problem holistically. We pursue the chase of the perfect experience of sound with an obsessive passion and vigor.

We do it because we love sound. We believe sound can move people more than any other sense. We believe it’s the integration of the bass via the perfect subwoofer that makes everything else better. And, ultimately, there is a great deal of satisfaction to be gained from doing this well, creating something of unique quality, such that you know it is going to inspire. It makes the hard work and the obsessing over each and every detail worth all the effort. That’s our reward.

Our Way: We obsess over the details, never satisfied, never finished, constantly refining, simplifying, building iteratively upon what has come before. This is the path to perfection, a never ending pursuit for better. We view the challenge simply, as the need to transform electrical currents into soundwaves that can extend the capabilities of loudspeakers. We then approach the situation holistically, looking at every aspect of the bass engine and improving any weakness or shortfall. Constantly testing and experimenting with new materials, engineering or design. Always striving to add more value with every improvement by delivering sound experiences, timeless beauty and reliability that outweigh their cost.

We take this approach on every model, no matter its size or cost. Because we believe the pursuit of prefect sound is a worthy endeavor, one that can start anywhere and last a lifetime. We hope you’ll join us.

The High Level Cable Separates REL From the Pack

Using the High Level input is always the best option. Using the High Level Input, instead of the Low Level Input, and connecting to the speaker output terminals of your amplifier is one of the unique secrets of REL’s success. When using the High Level input, your REL is fed the same signal that your main speakers are receiving. When connecting to the High Level input on the REL from the amplifier, you capture the sonic signature of your main system, including the tonal balance and timing cues of the entire electronics chain. This is a very important point and together with REL’s Active Bass Controller (ABC), ensures far superior system integration of the sub-bass with the main system.


1. PLACE Ideal positioning is located in one of two front corners nearest the location of the screen and main speakers. Corner positioning reinforces deep bass and produces more efficiency, output for a given volume setting. Take care to turn the sub inward at approximately a 45-degree angle to obtain best release of low notes. * These are recommended best practices for positioning a REL Subwoofer, always refine placement and angle by ear. ** To obtain optimal performance from a REL subwoofer and extend the performance of your speakers, your main speakers must be setup properly. Always follow the setup instructions from your speaker manufacturer first, before setting up your REL.	2. CONNECT (Stereo) For Stereo/Home Theater applications use the High Level input. When using the High Level input, your REL is fed the same signal that your main speakers are receiving. If High Level connection is unavailable: Connect via Low Level with a RCA cable from your sub-out or pre-out on your processor or AV receiver. .	3. CONNECT (Theater Reference) REL Theater Reference is when you connect High Level and LFE. It's important to connect High Level even for Home Theater. REL Theater Reference supports your main speakers turning them into a truly full range (20Hz-20,000 Hz) speaker while also provide Low Frequency Effects (LFE) during those subsonic part in a surround sound mix. Home Theater Applications: In addition to the High Level Cable also connect the LFE/.1 input. This input should only be used when connecting your REL to a Theater system. The LFE/.1 input can be used simultaneously with the High Level or Low Level input for seamless transition from Stereo to surround sound.

3. TUNE


1. Phase Move the phase switch from 0 to 180 positions and listen for whichever position is loudest or fullest. That is, when the position is working in harmony with your main speakers, reinforcing bass not cancelling it.	2. Corner Fine Tuning With the REL fully into the corner, and pointed to the opposite corner, continuing to play the music, slowly pull the REL from the corner on the diagonal, line to opposite corner, equidistant from both side and rear wall. At a certain point the REL will audibly play louder, go lower in frequency extension, and truly pressurize the room.	3. Orientation Rotate the sub on from an imagined center point at the rear of the REL listening for the greatest level of output.	4. Final Settings Now move both the High/Low Level control and Crossover control to 10 o’clock settings (15 clicks from minimum). In most cases this is just about where the settings will end up. The Level control should be at a setting where you can hear the REL even with the main speakers playing. This is Generally 15 clicks +/- 3 clicks. The Crossover control should be set to where the sub bass is not overpowering or sloppy. It should be in time with the impulses of the main speakers so you can hear the depth and dynamics of the low frequencies. Again, this setting is generally 15 clicks +/- 3 clicks.


	T/9x Subwoofer High Gloss Black	T/7x Subwoofer High Gloss Black	T/5x Subwoofer High Gloss Black	Tzero MKIII Subwoofer High Gloss Black	HT/1205 Subwoofer, HT-Air Wireless compatible, Line Grained Black Composite	HT/1003 Subwoofer, HT-Air Wireless compatible, Line Grained Black Composite …
	See Details	See Details	See Details			See Details
Customer Reviews	7	12	16	58	51	58
Price	—	—	—	$498.00	$799.78	—
TYPE	Front-firing active driver, down-firing passive	Front-firing active driver, down-firing passive	Closed Box, down-firing drive	Closed Box, down-firing drive	Closed box, front-firing driver	Closed box, front-firing driver
ACTIVE DRIVER SIZE & MATERIAL	10 in. FibreAlloy, 254mm long-throw, inverted alloy dust cap, steel chassis	8 in., 200mm long-throw, FibreAlloy inverted aluminium dust cap, steel chassis	8 in. FibreAlloy, 200mm long-throw, inverted alloy dust cap, steel chassis	6.5in., 165mm long-throw, steel chassis	12 in., 300mm long-throw, CarbonGlas cone structure, inverted carbon fibre dust cap, steel chassis	10 in., 250mm long-throw, CarbonGlas cone structure, inverted carbon fibre dust cap, steel chassis
PASSIVE RADIATOR SIZE & MATERIAL	10 in., 254mm long throw, inverted dust cap	10 in., 254mm long-throw, inverted dust cap	-	-	-	-
LOW FREQUENCY EXTENSION	-6dB at 27 Hz	-6dB at 30 Hz	-6dB at 32 Hz	-6dB at 37 Hz	-6dB at 22 Hz	-6dB at 24 Hz
INPUT CONNECTORS	High Level Neutrik Speakon, Low Level single RCA, LFE RCA	High Level Neutrik Speakon, Low Level single RCA, LFE RCA	High Level Neutrik Speakon, Low Level single RCA, LFE RCA	High Level Neutrik Speakon, Low Level single RCA, LFE RCA	Dual purpose Low Level stereo RCA or LFE RCA	Dual purpose Low Level stereo RCA or LFE RCA
POWER OUTPUT & AMPLIFIER TYPE	300 watts (RMS), Class A/B	200 Watts (RMS), Class A/B	125 Watts (RMS), Class A/B	100 watts (RMS), Class D	500 watts (RMS), NextGen5 Class D	300 watts (RMS), NextGen5 Class D
WIRELESS CAPABILITY	Arrow (Optional), Zero Compression Single Large Scale Integrated Chip	Arrow (Optional), Zero Compression Single Large Scale Integrated Chip	Arrow (Optional), Zero Compression Single Large Scale Integrated Chip	-	HT Air Wireless (Optional), Zero Compression Single Large Scale Integrated Chip	HT Air Wireless (Optional), Zero Compression Single Large Scale Integrated Chip
W X H X D	14.5 x 13.4 x 15.5 in.	14.0 x 12.6 x 14.3 in.	11.8 x 12 x 12.3 in.	8.5 x 9.5 x 10.5 in.	15 x 16 x 15.7 in.	12.5 x 13.7 x 13.8 in.
NET WEIGHT	45.5 lbs. (20.6 kg)	38.5 lbs. (17.5 kg)	31.5 lbs. (14.3 kg)	15 lbs. (6.8 kg)	38 lbs. (17.2 kg)	28 lbs. (12.7 kg)
FINISH	High Gloss Black, High Gloss White, 5 coats	High Gloss Black, High Gloss White, 5 coats	High Gloss Black, High Gloss White, 5 coats	High Gloss Black, High Gloss White, 5 coats	Line Grained Black Composite	Line Grained Black Composite