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 Black Finish

The REL T/5x has great fast, tight bass. Fills in the lower register perfectly. Can't see how a good 2 Channel Stereo system can do without a Subwoofer of this caliber. Highly recommend.

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!).

Awesome sub

Very musical! It's easy to hook up with the provided cord. I'm using 2 subs and couldn't be happier.

Was trying out various little subs at the time due to space. Have a Kanto Sub8 and it was pretty good. This REL just did nothing for me. Tried the RCA and also the high level inputs and it never hit. Also tried an SVS which ended up the same way. Cambridge Audio was pretty good. Ended up with a Goldenear SuperSub X, which was way out of the price range but is freaking awesome. The high level input cable stuff with REL is a PITA. I don't get it.

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).

This gorgeous, well-crafted little gem is perfect for my smallish listening room and pairs seamlessly with my Wharfedale Linton's. A musical sub is rare, one with this fit and finish under $1k as well is a unicorn. Bass is deep, articulate, and tight. Likely the long term reference for me.

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!