I have been waiting for the KEF KC62 matching subwoofer for the Kef Ls 50 and the Kef Ls 50 metas and then I heard the actual, like specs that they were putting out like,11 hertz, and I was like whoa. I look at the size and it’s puny on paper.

It is literally so tiny but then when I go to lift it, It’s pretty hefty for the size. It is pretty heavy. I mean, that thing is like 30 something pounds, and believe it or not, this little box has a lot of technology packed into it by Kef. 

So for the sceptical folks out there, listen, I’m the exact same way when I see a small subwoofer. I go, “Ha! that’s gonna be a small sound “. How can it beat a big subwoofer if it’s a small sized subwoofer? But looks can be very deceiving and the KC 62 certainly is a small subwoofer by size, but there is technology involved that allows it to be so small.

For example, the drivers use the unicorn technology which is patent pending according to them. And that’s basically allowing the two drivers on each side to share one magnet structure. And what this does is it allows you to enable the size to be reduced by one third, which is quite significant. So what you’re seeing right now is technically the subwoofer one third of its original size if it were to not share the same magnet structure and the 6.5 inch drivers that are powered by 500 watt Class D amplification per driver. 

That’s pretty significant enough power to drive these drivers and also because they’re opposing each other on each side. They’re cancelling out on the inside allowing the resonance inside the cabinet to be eliminated. So when I play them and I put my hand on top of the cabinet, even at very high levels, I don’t feel much resonance, and you can actually hear that in the music as well when you’re listening; so when I play for example; flight of the cosmic Hippo, that track has a very great mid bass energy, and sometimes when you hook up a subwoofer to it, you hear the boxiness of the subwoofer being more apparent. 

This doesn’t have that very linear bass response and we’ll talk more about that later, but the mid bass and all the way down to the extension in the lower lower octaves are very linear in my opinion, and you really hear that.

You don’t hear any boxiness or resonance of the subwoofer. Now in the back, aside from the LFE input and the normal line input, it also has speaker inputs, speaker level, high level, whatever you want to call it. It’s just for sending a signal to the speakers from our amplifier and no it’s not drawing anything from your amplifier.

It is such a good way of integrating your subwoofer to your system, but there’s one problem with this, first of all, it’s not very convenient so you have to connect bare wires to it and then to the subwoofer. And you have to have the right gauge of wire; you can’t use something so thick because then they will be touching each other and then short circuit itself, so you should be using something that is thin enough.

The second factor may not be as daunting. It is the fact that this adapter is not very high quality, and you can probably lose it very easily because it’s so small and you may have to go and get a replacement, but that’s about it in terms of cons for the functionality. I did use it with the speaker level for the most of my review and I actually loved itIt sounded very, very musical and was very easy to integrate into my system. Yes, the bare wire part was painful in the beginning but once I did it, it was done and I didn’t have to look back.

They have multiple EQ adjustments in the back as well, which is very handy. Now I didn’t go through all of them. I did most to my review process at least right now with KEF Ls 50 metas and abnormal EQ settings. Now I do occasionally go to the apartment setting to see what it does and if it’s really helping with the whole situation. Now I really wouldn’t call this an apartment EQ. It is basically reducing the bass output so that you don’t disturb the neighbours as much in the very lower octaves and shaking the house and stuff like that. So, I would call this like a night mode or something that you do at night if you don’t want to disturb your neighbours, because getting a subwoofer and putting it in apartment mode for the most of your listening is actually kind of wasteful.

I didn’t get to pair the subwoofer with other speakers. I just had it with the KEF LS 50 metas. In the future if I have more time then i will definitely tell you what it sounds like with other speakers, but I would imagine that it sounds great, at least from this experience. So the KEF LS 50 metas and the KC 62 is just absolutely incredible. It takes the KEF LS 50 metas to the next level. 

And you might be thinking, “ well, you’re just getting more bass, How can it possibly make it so much better? “ And that’s where you’re wrong. Adding a subwoofer and getting that bass correct really allows the speakers to be an entirely different beast. So first of all, you’re allowed to use different amplifications like a tube amplifier like I did with the Wilson 10, because now it’s not so hard to drive because you had the bass figured out and taken care of by the subwoofer. You can play these speakers louder and overall even the high frequency is more smoother because you have that bass fullness and warmth, so it’s more warmer sounding. 

Overall remember when I said in the KEF Ls 50 meta review that it solves some of the problems that the KEF Ls 50s originally had, but it doesn’t totally solve them entirely. Well, this subwoofer basically does that and more. It solves a lot of the issues that the KEF LS 50 metas had and it just sounds much much better. It sounds more full range than ever. It is basically a full range sound and it’s just incredible; you almost feel like you’re sharing a subwoofer version of the KEF Ls 50, which, if you imagine, is just absolutely incredible. 

So for those of you that were considering others because you found the Kef LS 50s to not have enough bass, well, you may consider this baby because this is worth an investment. The integration between the subwoofer and the speakers are absolutely easy as heaven; it is quick and placement is absolutely easy to do. I had them placed in like less than 30 seconds. The most painful part was the bare wire with the speaker level connection, but that’s about it.

Placement was easy, the integration was easy as heck. I had a subwoofer crossover around at just above 80 hertz and that was perfect with the Kef LS 50 metas in my room. The bass was full, but it was linear, no unsaturation, it was impactful and extended really low. Anything you want from a sub, it had it. The only thing that I would say is still a small subwoofer. 


The volume is very impressive, the amount of output is very very impressive and it does go down low. I don’t know about 11 hertz because I can’t hear 11 hertz, but I certainly feel a lot of energy, and it’s just incredible impact and extension that I would say even the best, some of the REL subwoofers that I’ve heard in my room. And just to test how fast the subwoofers were I paired them with the Magnepan LRS speakers, and my goodness, these pair up even better and faster than the REL T’s that I’ve loved so much.


So yes, my current recommendation if you have a magnepan speaker and looking for a good subwoofer that integrates well, the KEF KC62 is it. The dispersion is absolutely incredible because it has two woofers on each side. It’s almost like you have two subwoofers; the only reason I think you would get two is because you would want more dispersion like having four subwoofers kind of dispersion, which is going to be actually incredible, and you want to use it for home theatre purposes for more room on the bottom and when you watch movies, but for music, I think this was almost perfect for almost any size of room.

I think you can even get away with large sized rooms with this if you have a maximum. So when I was playing tracks like Looking for love for example which is a very bass demanding track that has two distinctive low bass notes and you can hear and feel and all the textures, it is an absolutely incredible experience I would say. One of the best experiences I had with that track with this setup was absolutely breathtaking. 

But at very high levels and mean uncomfortable levels; and I only did it to test this subwoofer, you do start to see the subwoofers giving up, meaning the drivers start to kind of tap out and distort, and that’s a very high level  volume. So like I said for a home theatre purpose I would imagine myself having two, for music purposes would be overkill, but it would be nice to have.

And this is certainly an upgrade to any speaker system in my opinion, it does go down low with very linear extension. No bass chuffing or exaggeration due to the cabinet. I absolutely love it ! I like the fact that it doesn’t have any cabinet resonance that is audible to my ears. So that’s my experience with the Kef KC62 subwoofers. I absolutely loved it ! It earns my highest recommendations. I definitely urge you to try it or if you’re looking for an upgrade to your KEF LS 50 speakers, this is it ! This is it guys, I definitely think this is worth the upgrade. 

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