Great combination. Have a modified TF 550B and 2 Aguilar DB112 and very impressed. I know there are some on TB who feel the GS112 may have more bottom but the DB with a Thunderfunk has some serious bottom end yet very focused. I had one cabinet and played it through the TF but when you have 2 they become a different animal. Has a nice top end, not a flashy sizzle but good and pronounced all the same. The mids really kick in. When eq'd right the high and low mids are nice and smooth. A stand alone sounded a little barky in the mids. Not bad but I can see why some on TB had commented on that. The low end was very versatile. A real focused bottom end to 'hey your too loud" type of bottom. Worth cheaking out.