Subwoofer recommendation for jazz and rock

Adnan-

REL is the best sub period. It will integrate well w/ your existing system- no problem. Demo the various models to find the right fit for your ears!

Keep me posted & Happy Listening!

I was in the same situation a little over a month ago. I purchased a pair of SVS SB13 Ultra subs. The other sub I recommend trying is the Rythmik Audio F15HP.

The REL system of "high level" input presents an extremely high impedance signal to the speaker jacks of your amp (i.e. the amp doesn't feel much or any speaker load from the REL) which is unusual but works well…and doesn't require long RCAs, just a single speaker wire utilizing 3 conductors to a Speakon plug). A few years ago I bought a Q150e for 200 bucks used (needed a grill…meh…) and it's an amazing thing that provides all the bass I need in my medium large room…I also am a jazz freak and the REL can really charge a room with an appropriate level of lows that simply make the whole sound feel far more realistic.

I also have the REL Q105E and it is amazing. You don't even know it's there until you turn it off.

I used a Rel T2 for a while and found it fairly easy to integrate. I also used the hookup method described by Wolf_garcia, worked well.
My only complaint with the T2 was it did not have an auto-on feature.