REL 12" Carbon vs JL Audio 12" Fathom


I decided to make a new thread on this.  Plenty of people love both of these.  I am looking for two new 12" high end musical subs for two channel audio.  I am familiar with and LOVE the REL Carbon Limited's. The New Carbon Specials are supposed to be even better.  But now I am looking at the JL Audio Fathom F112v2's.  Because they have EQ that would be great for my boomy basement.  I want: 12", super musical and fast for high end audio.  I also want EQ. But are the JL's as musical as the REL's?  We are truly comparing similar spots in each company's line...12" sealed, $4000 list.  Would love to hear from folks who have compared...Happy Holidays!  Ken
fastfreight
Ken, Everyone’s ears are different, but mine like realistically strong and even bass. I listen to lots of different stuff, including a good amount of orchestral classical music.

I’ve been using a pair of JL Audio F112 for 15 years now, and I have no complaints with the sound. They integrate beautifully, and you can’t tell where the bass is coming from.

To integrate a sub properly, EQ is needed in most (if not all) rooms. I don’t know if the REL has much, but the F112v2 has a lot better EQ than the F112v1 subs I have. It doesn’t matter to me, because I use digital EQ in the preamp to EQ the bass, but if you don’t have some form of good adjustable EQ, you will never get optimal performance from subs. So I’d vote for the Fathoms. They are damn good subwoofers!

Happy holidays to you, too!
Thanks mike,
Yes I think I do need the EQ in the Subs.
I appreciate your response!  Ken
The JL v2 has room optimization, no idea how well it works. SVS subs do as well. 
Don't overlook this one: https://6moons.com/audioreview_articles/modalakustik/

It's only a preview of a review but I've seen one speaker manufacturer use this style/approach in one of their speakers (built in at the base of the speaker) at an audio show and it made some deep and credible base.

Here is their website as well:https://www.modalakustik.de/english-1/

All the best,
Nonoise
Hi Krenooo6, 
I just purchased and received a pair of the REL Carbon Specials.  Very Happy  I was able to change the position and smooth out the booming issue I was having.  I set them ujp with the REL Air Ship wireless, which makes trying different positions a breeze.  Moved them away from inboard of my speakers pointing straight at me, and put them in far corners angled into the space.  Seems to give the sound more room to spread out and less immediate reflection points right back at them.  Anyway, happy with my purchase of the REL's.  Ken
I have a friend with two Fathoms. They are beautifully made and sound fine. He runs them with Watt/Puppies. I can not comment on the RELs.

Just a comment on using the term "fast"  in describing subwoofers. The speed of a subwoofer is noted in it's specifications. The higher the frequency a sub will operate at the "faster" it is. If a sub's high frequency limit is 300 Hz it will be just as fast at 80 Hz as a sub that has a high frequency limit of 500 Hz. The sub with the limit of 500 Hz can go faster, at 500 Hz. Two 12 " subs going at the same volume at 80 Hz are going at exactly the same speed even if one has a higher high frequency limit. What people really mean when they want "fast" is that they do not want "muddy" Muddy bass is bass that lacks detail and can be caused by a number of factors. The first and most important is the quality of the enclosure and the resonances it produces. Next is damping, the ability of the amplifier to control the woofer, then there is frequency response. A system that has a peak in the 80 to 150 Hz region and a lack of acoustic power below 80 Hz will sound muddy. Any subwoofer can have a frequency response good to 20 Hz with the microphone at 1 meter. Only larger subs (or more subs) with a lot of power and drivers with a high Xmax can project that energy into a normal sized room. Room control is required to do it really well. 

I hate muddy bass. I like my bass lean and tight. I want to feel every kick drum beat and I want to hear every single note a bass plays. I always adjust my system so that there is a 2 dB or so dip centered on 125 Hz covering about 1 octave and increasing volume from 75 Hz down so that the bass is up 5 dB at 20 Hz. This approach gives me the bass I like which is what I think most people mean when they say "fast." 
I know this is an older thread but Rel vs. JL is no longer a complete comparison.  You have to hear evaluate Perlisten subs.  The D12s can easily go toe-to-toe with either of these and IMO, has a better DSP for integration.  The DSP recalculates 1000 times / second to ensure it is optimised.  It is incredible technology and I think will be in huge demand once the reviews hit.  
["mijostyn; I hate muddy bass. I like my bass lean and tight. I want to feel every kick drum beat and I want to hear every single note a bass plays. I always adjust my system so that there is a 2 dB or so dip centered on 125 Hz covering about 1 octave and increasing volume from 75 Hz down so that the bass is up 5 dB at 20 Hz. This approach gives me the bass I like which is what I think most people mean when they say "fast."]
+1
Mostly analog I can't mess with the 125Hz neighborhood but I'm just below you, slightly feathering in my crossover EQ in the high 60's.  

I had both of these brands in the house for a short time. There was a huge adjustability and performance disparity between the two. 
Aside from the speaker level connectivity convenience R. E. Lord designed in back in the day, adding some low frequency pressure is better than no sub at all.   

Appreciate this thread is a few years old but I find myself with the same question. 
 

f112v2 versus the Carbon Special. Curious what users say today?

 

GD

Hello @gdfein ,  Still loving my 2 pairs, one Carbon Limiteds and one Carbon Specials.  Once dialed in they disappear and make everything better.  I did move them around a bit, one pair is run with REL wireless, the other wired.  They are not in 'standard just inside the speakers' position, but rather off to the sides, pointing at right angles to each other.  I have not tried the JLs, but love my RELs.

Friends don’t let friends buy JL Audio. I have had 5 failed JL E112s subs in under 10 years. They keep fixing them ($500 my cost to fix) but must not know what they are doing as the same failures with electronics keep happening (fail crossover, failed volume pots, dead amp…). I still have one working for now but I don’t even think I am going to fix the 5th one. No point, time for a new brand, JL is dead to me. They have a good repair program which is good, because you will need it. 

@james633  I can understand your persistence. Since the early 20teens the only worthy subwoofer innovations combined with functional build quality that didn't take their manufacture into the exotic cabinet centric five $ figures were Velodyne USA and JL Audio.

Since their respective second versions, even the exotics are still playing functionality Ketchup. As I read your plight I pray for longevity of my own subs whose Euro NOS design has literally doubled in price!

Has the manufacturer offered any accommodation as an owner of five E models or do you think thats reserved for the upper end F Series?