It always seems to be pretty easy to get a big, fat low end sound with a bass, but it's not always what you want. Too much, and it sounds boomy. The D112 will carve the midrange out a bit, which can work pretty good - leaves room for guitars, vocals, snare & anything that relies on midrange.
To my ear, it seems like the low midrange and the higher end of the bass frequencies are the critical ones. It's hard to say without hearing it, but maybe try to back off the low bass frequencies a bit, and work on the stuff around 100 to 300 Hz to give the track the right thickness. The high frequencies around 2k to 10k will help to give you the right edge and definition. Low mids are the secret weapon for big & thick. Anything below 100 Hz seems to be where the boom is.
If you print tracks with the DI signal and the amp, a blend of the 2 might work well, and a bit of compression can be a big help.
If the cab is on the floor, it might help to raise it up a bit to get rid of some boominess.
sl