It's not. THe ICelink depends on an external preamp and control unit.
You don't NEED to get "data" to a non-DSP amp. You only need to get it a remote-turn-on signal and an audio signal. Many installers use an adapter such as a Peripheral SVEN4 for this.
But out of curiousity, why would you want to pull the HU and keep everything else? The HU is the best part of the system...
