I have 2 volume knobs, one is the headunit volume master, the other is the DSP volume control for my amp. If I wasn't using optical I could click a button on my HU and adjust sub level, but as it stands my DSP controller works as the sub control with one button press.
Ill bet its the same.I mean They Look almost Identical IMO.They had some 5ks out a while back. and I think an 8k when I was looking around. There are some Dynos out there on this brand, different model, by an Audio Shop out of FL.