I have a set of L112s, which I love, except for what I think is a bit too boomy lower mid-bass, and lack of deep bass. Has anyone combined these babies with a good quality sub crossed at about 100hz? I am not looking for a boom box, but well defined lower frequencies, and taming the lower mid bass a bit. I use the GFP 565 Preamp in by pass mode (no tone controls).

Rest of system, for info:

Adcom GFA 555MkII Amp
Adcom GFP565 Preamp
Adcom GTP500II Tuner/Preamp used as a Tuner.
Marantz CD5001 CD Player
Dual 1249 TT
Audioquest Groove Dancer and Stanton 681EEE Mk III cartridges