Model Number: MRN-80.4D Brand Name: ORIENTECH Key Specifications/Special Features: * 2Ω125W*4* 4Ω80W*4* 4Ω250*2 (bridgeable power)* New IR (international rectifier) platform* Aluminum die-cast endcaps design* Ultra low current draw with more than 85% efficiency rating* Full crossover filters: LPF/FULL/HPF* Robust unregulated power supply* PCB conformal coating painting* 4 layers PCB traces design* Audio precision quality control verification* Wide level input sensitivity: 0.1-10V