What are the best subwoofers you have heard for music. Speed, Musicality and integration

Having two in my system that integrated very well and fairly easily, I would say using the Speakon high level connection helps tremendously.  They get fed the same signal the speakers do.

calvinj

REL is the best Sub in the business. 2nd is Sunfire (smaller in size yet still packs a punch (no pun)).

Happy Listening!

@jafant i had a sunfire true super jr that I loved.  It was such a great sub but it died on me.  It got replaced by two RELs.

@calvinj 

i started a REL thread in the speakers forum a few weeks ago.  In a few days I will have a T9x installed in a secondary system 

https://imgur.com/gallery/building-resonance-free-subwoofers-dOTF3cS