I sort of understand what you’re talking about, but I think the low end actually sounds quite good, it just not very, you know, ballsy.
And because of that you can always boost the low end with your favorite hard/software EQ, to get a ballsier low end. The bass knob of my mixer is pretty much permanently set to boost a few dB. After that, I think the A4 makes quite nice a bass synthesizer.
Then again, currently it’s my only synthesizer, so I can’t compare it to anything. I’ve been thinking about getting a Minitaur for the sole duty of handling the basslines, but I have some other stuff to buy first, so it’ll have to wait some months.