Hi End speaker box terminal and class D plate amp for sub horn

[Best Hi End]

I'd appreciate any recommendation for excellent quality Hi End speaker box terminal (non Chinese and not bi wire) for Hi End active 4 way speaker .
Also,I need recommendation for non Chinese super quality Hi End class D
8 Ohm plate amplifier for active sub horn with minimum 500watts per channel on 8 Ohm preferably with DSP with minimum 16k taps