Dear DENGTONGJIN,
for our audio amplifiers portfolio please refer to this link. We have four dual channels and quad channels audio amplifiers. Unfortunately the dual channels are not so powerful. They have 85W if single channel is selected or 43W per channel for dual channel selection.
The quad channel versions cannot make as dual channel for higher power output. I am afraid, we do not have a suitable replacement for you.
I apologize for inconvenience.
With Best Regards,
Jozef
