GR Bass ONE350, Amp Head for Electric Bass, Power (RMS): 350 W, Impedance: 4 Ohm, Controls: Gain, Low, Mid Low, Mid High, High, Volume DI, Headphones Volume, Master volume, 3 Selectable frequencies for mid low: 185, 375, 800 Hz, 3 Selectable frequencies for mid high: 600, 1200, 1800 Hz, Deep and Bright Boost switches on each channel, Pure Sound switch (EQ Bypass), Switchable LED/Fan Mode, Mute switch, Ground lift, DI Pre/Post and power switch on the back, Effects loop: Serial, Front connectors: Input, aux in, headphones out, Rear connectors: FX Loop (Send, Return), XLR DI-Out, Dimensions (W x D x H): 265 x 220 x 58 mm, Weight: 1.6 kg, Colour: Black, Made in Italy