Your right Greg, I should choose a better word/term than 'better' I've got sucked into the GS vortex where everything is better or best. In reality the new US made Nicerizer's are the best units that we've ever made in terms of :
Component quality - we now use panasonic/nichicon & Wima caps
Connector quality - we now use all Neutrik as opposed to the older units
Wiring - we now use PTFE silver wire
User serviceability - these can now be serviced by users with no real technical expertise, which helps with guys whom live out in the 'burbs' or far flung places.
Sonically speaking, I have a great quote from you : "At last, I have a summing box that not only preserves the sounds that I capture and blends them effortlessly, it actually improves on them in a way that is not at all subtle and is nothing short of stunning. "Nicerizer" is such a ridiculously appropriate name. Bass goes deeper, wider and inky black, without a trace of muddiness. Spiky digital transients are softened in all the right ways, on the order of microseconds to my ears. Midrange is creamy smooth, and highs are completely silkened... this is most apparent when using crunchy drum loops, as I'm wont to do in my own music. Any remaining sense of "digital" is swept away, and a gorgeous 3-D analog landscape opens up."
So essentially sonically its very similar as before, but with a few changes to components there is a subtle difference which we feel has enhanced the sound of the unit particularly in the lower end and overall stereo imaging of the unit. email@example.com