Protection:
1)DC Protection
2)short circuit protection
3)overheat protection
4)over current protection
5)Input protection
dvange:1)Digital Amplifier
2)LCD display
3)USB,MICA,MICB,EGM,AUX,Speaker Connector
4)Input level adjustment
5)aluminum panel
6)Big capactors
ModelD350D250Output Power(8Ω)350W*2250W*2Output Power(4Ω)600W*2450W*2Frequency Response20Hz-20KHz(+0.5,-0.5dB)SNR98dB95dBSensitivityMIC8.5MV,MUCIS220MVTHD≤0.05%Impedance47KGConsumed Power900w800wN./W.9KG8.5KG