The ribbon tweeters are more effective at ear level, rather than down at your feet. I get a lot of bite from reeds on my Adams, but they're all up at 5 -6 feet from the floor.
However, for the big pedal reeds on Salisbury, I send them to the SVS sub plus 4 KRK RP-10s on the floor and get plenty of snarl down to the bottom. Not sure the F7 has quite enough support in the low range for that, and the sub will tend to sound too smooth if the F7 isn't providing enough mid and upper power relative to the sub.
So maybe increasing the F7 levels and placing them up higher would be enough.