REL T/5x 8-Inch Powered Subwoofer – Compact Sealed Design with Class AB Amplifier, RCA Inputs, and Powerful Bass for HiFi Stereo Systems, Home Theater, and Surround Sound – High Gloss White Finish

Awesome sub

I have a pair of vintage AR M1 Holographic speakers, which is a high end bookshelf speaker. I was told years ago by an audiophile friend that they need a subwoofer to really sound right. Finally I did some research on quality subwoofers and decided on the REL T5/x for my medium sized living room. It really completes the sound and makes those speakers sound great. It’s not set to thump like an obnoxious car stereo, just to create a full, lush sound. I couldn’t be happier with this choice of subwoofer. It’s very clean, precise and musical. It helps bring the whole sound to life - not just the low end - like it adds dimension to toms in a drum set, fullness to brass and reeds, overtones of a piano, overall imaging. My stereo went from pretty nice to YEAH! Definitely recommended!

Very nice sub. It was easy to to setup. Liked it so much, I got it's mate. Dual subs is the way.

This replaced a broken Velodyne MiniVee, and so far I’ve been very pleased with it. Excellent sound quality, and connecting the high level inputs was a breeze. I especially like how much information REL publishes on YouTube to determine which product will work best, and then once you’ve bought it, how to install and set it up. Their customer support is top tier (hi, Dermot!).

You may have heard REL talk about their 8ms filter. I suspect they're using FIR filters to time-align (and EQ) their subwoofer. This is all well and good, and indeed the group delay of a sub can make it challenging to integrate. Unless you locate the sub right next to the listener, and your mains are at least 8ms farther away than the sub, youll get a bit of time distortion. Whether this is audible is another question, and how good it'd sound with treatment is another. I ended up returning as without treatment a sub is an uphill battle, integration aside. Great build quality. Very powerful sub. Doesn't go as low as the Rythmiks and doesn't have their adjustable phase knob, but again the REL will be more time-aligned (despite the 8ms group delay).

Using the high level speaker input, in a small 10 X 12 room, REL is a good step up from a speaker manufacturer branded sub. Whatever you do, dual subs should be what you shoot for, so whether you buy one and then the other, or both at the same time, you're leaving low end detail and separation on the table if you don't.

I looked on the Internet and found many other reviewers with the same exact complaint unit does power is on and has the faintest ever output, but there’s something clearly wrong with it. Having been an audio for several decades and having owned near half a dozen subwoofers, I tried it with different cables on two different systems and got the same result went on the Internet and found many other people are having the same problem Buyer beware

I have dual T5x's. Based on recommendations that this would not be powerful enough. Let me be the first to say, this is as much as any 10" I have heard. I am not disappointed with the dual setup, but I could have easily used just one. The unique way the REL's aquire the signal is also very good. It really helps blend the low end into the music. Also, it helps with voicing. I have an amp that is not too heavy on bass. Vs another that is heavy. The special REL cable allows me to capture that voicing. So many other subs are boomy, this one is tight and accurate. The dials are also indexed so little changes can be made accurately. I looked at other brands that have apps and such, but really once the subs are set I almost never touch them. So on the fly adjustment was not that important to me