Epifani PS400 Bass Amp Head (Black) CONFIGURATION Single Channel Preamp Class-AB Poweramp Epifani Switch-Mode Power Supply POWER RATING 400 watts into 4 Ohms NPUT IMPEDANCE Passive 470k Ohms Active 200k Ohms SPECS Amplifier Response 20Hz - 25kHz Signal to noise 90dB FEATURES Passive/Active Input Select Adjustable Input Gain with Peak LED 3-Band Shelving EQ Treble Shift, Mid Cut Level Adjust Mute, Master Volume DI Out with Adjustable Level Control Pre and Post EQ, Ground Lift, Tuner Out EFX Sends, Returns and Blend Speakon Output Connector DIMENSIONS 3.5"h x 19"w x 11"d 13 lbs