I am real happy with my Stereo Integrity Mag v3. I havent heard most of the others so I can't say it's the best, but it sounds damn good IMO. It has a more throw than most and likes the super low notes while still retaining finesse and agility.
My vote goes to the w6v2 series by JL Audio. I have used this series in the 10w6v2 12w6v2 and 13w6v2 model and they all to my ears are the best I have heard.
I have tried other subs that are said to be comparable or better but I keep coming back to these.
But like what has already been mentioned everyones ears are different some of the member's post's in this thread mentioned they prefer certain subs over the w6 while I prefer the w6 over the same subs they compared them to but I respect everyones differences as it is a personal taste.
I've had a pair of JL 12W6s with 1 cft each, a pair of Velodyne DF-12SC tuned running in freeair. I am currently running a Boston Acoustics SPG-555 in a 1.25cft box and think its the best of them all in my install.
I havn't used any of them herz, and IQ and all that but i've used alota the main stream brands, but by far the best sub ive personaly come into contact with is the one i have now which i am in love with, the w12gti mkii by JBL, just pure win
Why does it feel like this is a thread based on "what sounds best to you" instead of "what sub provides the best SQ" in regard to what might actually make you competitive in an SQ competition?
To some, a Hifonics Olympus or a Kicker L7 might sound great, but they will rarely win you an SQ competition and are not well suitable by comparison to other subs mentioned in this thread. There's a lot more to SQ than just flat frequency response.
So what would be some of the subs more likely to place in the SQ arena?
how about a sub from KEF,I had a 10" in a .85 cuft sealed box between the front seats of my van for about 8 years,blended well with every set up i had,peaple didnt even know there was a sub there,it wasnt real loud,but played deep & clear,may not be as exotic as some,just one I really liked.
For clean SQ bass..................I really enjoyed the Infinity Kappa Perfect 10DVC. 1600 watts peak....................SSSSSSSSSSSSSURE... It was nice and clean.
I really wonder what happened to Infinity with their subs. Looks like they were going in the right direction with the neo-based Kappa series, but then out came the new series that look like they were designed by "50-Cent"...
i took a chance on a dd audio 9110c, pretty rare and hard to find sub. having owned dd audio subs in the past i have never really considered them sq subs. but this 9110 series really is, its in a small ported box and sounds amazing. tuned at 33hz, winisd shows the response to perfectly flat, and down -3 at 31hz. it really reminds me of everyone saying the ultimo blends so well with the midbass it doesnt sound like a subwoofer, just that you have very powerful midbass drivers. with music not having a very strong bass line i feel this exact way. the sub is barly noticable and not directional, but when you put on some heavy bass rap music, and cut up the sub level a few dbs via the bitone drc, the sub comes alive and drops the mirror, like a true dd audio sub should.
just to give you an example, i had a critical mass ul12 firing into the cabin, with twice the power, this dd is my new setup with half the box size, half the power, and a trunk setup, and i like it better.
i think the true secret behind the design is keeping the coil a bit out of the main magnetic gap until it gets really moving. letting the sub be more laid back under normal listening, still requiring a good deal of Power to give its dynamics, but not really using it to its full potential not having the coil in the strongest part of the magnet. i know this sounds ass backwards but, i really think this might work to its advantage