The early ICE modules used by Pioneer were the
state of the art 10 years ago...
But were later replaced with higher performance Class D solutions, IR produced the MOS-FETs outputs and they came out with their own Class D solution that Pioneer/Elite used after the ICE solution.
How much better was the later IR Class D solution compared to the early ICE??
It was slightly better sonically, but its major advantage was
lower material $ cost by about 27%....
Just my $0.02...