Rel subs

What are the differences from the "Q" series and others such as strata, etc.
The "Q' series are the lower end of the Rel line. I've got
two Strata III's and they are excellent. I'm using them
as part of a home theater system but previously used in
combination with Magnepan 1.6's. They are very tuneful and
have both low and high level inputs which makes them very
flexible and easy to integrate with most speakers.
Q series was designed for home theater, ST was designed for music. I've never heard a Q series, but I own a strata. I gather the Q produced greater quantity of bass, where the ST produced greater quality.

I like the strata 3 for music, but I can imagine it would be a bit lacking in grunt for HT applications.