I still use a Velodyne SMS 1 for the very reason Juan points out. It is much better to use DSP for low frequency problems , use the right main speaker for the job along with room treatment.
DSP vs New Cables ??
For two channel listening DSP can be a bit unnerving for the die hard listener who wants pure sound. However, of late, the Technology has improved and DSP impact to address room issues can be really quite nice. You will very likely notice an impact. When you get new cables you may notice something but it may not be dramatic enough to impress you vs DSP.
Home theater DSP much easier if you have a good processor or receiver. And this can have a meaningful impact and cables may have a lesser impact.
So my executive decision of the day is to defer buying new cables (was planning to spend 3K for some interconnects, transparent or silteck). So I'll revisit dsp for home theater. Two channel Will require new stuff and I'm a bit Leary to introduced more stuff along the signal path but I hear it's not that bad and won't really restrict the path, hard to tell.