REL Vs SVS for 2 channel music listening

A last thought on SVS (or any sub)...

Generally, ported’s okay for home theatre but sealed is better for music.
("generally" because there are probably exceptions)

I agree. I've had both. The ported sub was a bit "loose" or sloppy for music. Felt slow as well. Great for action movies where you want to feel the low rumble of a submarine, etc. The sealed unit sounded like more of an extension of the speaker woofer. 

I just bought a Fg rhythmik sub sealed for music , design for tubes amps.$950 it’s very very good, Sbayne Agon member replaced his rel for rhythmik..,easy to use, people there were very knowledgeable....

I believe jayctoy meant to say he bought a Rythmik F12G. The G designates the GR Research 12" paper cone driver, the aluminum-coned Rythmik version being named just F12. The aluminum-coned woofer is said to play louder than the paper-coned version before "breaking up", due to the greater stiffness of aluminum. Danny Richie of GR Research designed the paper-cone woofer because he feels paper has a more natural, organic timbre than aluminum, and that the paper's lower mass produces greater low-level resolution. When have you heard a sub talked about in those terms?! The Rythmik and GR Research subs are unusually good at music reproduction.