Best sub for music,


Not HT, repeat not the boomboomboom of HT  effects.  which does not offer the high fidelity of musical sub bass (20hz-40hz) 
I'd have to go with the seas W26E001. which has a magnesium/aluminum cone. 
What that raitio is, not sure, seems 50/50. 
None of us here like the sound of those old aluminum cones. But my guess is Seas had to incorporate some alumium inorder to gain the 20-30hz and also mabe keep costs down. 
This YT vid says **Aluminum cone** which is confusing YTers.
Its a  composite, and perhaps the best ture woofer on the market.
Been around for ages, still hard to beat for pure natural low mids. .
Magesium is the best material to keep unwanted resonances out in the  60-1k range, very low/hardly measurable distortion. 
The issue here  tops out at 1k, so its really a  sub. 
This woofer may be a  good candidate to pair with a  5 inch wide band. 



https://www.youtube.com/watch?v=RSiuaMWodzI

http://www.seas.no/index.php?option=com_content&view=article&id=362:e0026-08s-w26fx001&c...
mozartfan
Replaced my S812 REL with 2 Rythmik dual firing subs. Never knew how much my mighty REL were holding back my music until the switch.
2 HSU Research VTF 2 Mk 5. Driver is 12” front facing. Variable tuning (ported, dual ported or sealed), defeatable crossover, EQ settings to match port configuration and a nicely operating auto on mode that you never notice One wasn’t enough, although they measure down to 16HZ at around 110dB after setup. I will eventually get 2 more for my largish room (24’x 20’). You get a discount if you order 2 at the same time. 
I have had two REL 812/s (10 inch) in my system for a year.  I am super happy with them.  They have paired well with my Avantgarde Uno horn speakers (which have their own powered sub woofers). I will be adding another two later this year.
Another vote for HSU. Don’t like the super slam of HT?
Pull back on the gain. The VTF line of HSU is incredibly versatile.
Amazing performance vs dollar factor.
Best budget “super” sub in the market IMO