1. Simple design, rated voltage power amplifier, convenient changing different kinds of preposing, the project can flexible fit. 2. XLR interface/Hphone Jack interface is apposing, convenient to connect lines. 3. Equilibrium/Nonequilibrium inputs are compatible, suitable for long-distance signal or short- haul transmission. 4. Excellent 2U casing design, convenient to install. 5. Providing 4~16ohm rated Impedance, convenient to connect and monitor, furthermore having 70V/100V rated voltage of output interface. 6. Complete overflow,overload,overvoltage,short circuit and high temperature of protection function. 7. Excellent strong wind and cold technique can ensure longtime and steady working under high temperature condition. 8. LED indicator light of voltage level is clear, convenient to see working state. 9. Collocating signal output interface, convenient to connect more amplifiers.