ICEPower went through several incarnations. I can attest that the AS (or ASP if powered) is superb.
ICEedge is the chipset without the amplifier. :) Just the brains. So I think that we’ll start to see a lot more product differentiation among vendors.
The normal ICEPower module is 100% complete and tight in space. There’s no place to modify anything. At best, you can put in your own input buffer stage, and you can do lots with that. Transformers, tubes ets. but the ICEedge is the place where you can go really bonkers with part selection and circuit design.
I have no personal experience with these amps and linear supplies.
Best,
E