Thinking I need a Sub...

I stuck a "chicken head" knob on the level pot of my REL as some stuff needs tweaking...not enought bass, way too much...etc. The purpose of that knob is to be able to tell where it is by feel since it faces toward the wall.

@Wolf_garcia. If you were to buy a Rel sub or two, which model would you buy? I'm torn between two T7's/T7i's, two S2's, or one S5. My speakers are Casta Model C's, Audiozen tube pre, tube Dac, dual mono amplifier all with seperate power supplies. Full top Hidiamond fleet of cabling, Audiophelleo reclocker. My room is 19 deep x 13 across x 8ft high with carpeted floor.

The sub(s) would be used for 2-channel and home theatre. 65 music/35 movies. Thx.

I bought a REL Q150e for 200 bucks 4 or so years ago, and a Q108 Series II also for 200 bucks recently so I'm in the Sub Cheapskate camp (both subs work perfectly and sound amazing). New RELs seem well received so any of them should work, and one larger REL produces deeper bass generally although multiples of smaller subs can also work with less effort I suppose, but your room size indicates one should do the job…that new REL wireless gizmo seems like a great idea by the way.