1、The effect is built in 9 speaker preamps including for 65 twin, JCM900, AC30, for LONESTAR, for DUALRECTIFIER, 5150III, TH200, etc. 2、Each AMP has clean sound and distortion channel, a total of 18 tones, which can be switched by pedal switch. 3、Adopt dual channel design, you can switch from clean sound to distorted in performance. 4、With cabinet simulation function, it is convenient for stage audio performance, and with FX LOOP interface to help balance output. 5、The digital preamp effect has a complete set of functional knobs and interfaces, stable operation and strong practicability. Item Type: Digital Preamp Effect Material: Metal Colour: Black Input: 1/4in mono audio interface(impedance 1MΩ) Output: 1/4in mono audio interface(impedance 600Ω) Headphone Output Impedance: 32Ω XLR Output Impedance: 600Ω RETURN Input Impedance: 1MΩ SEND Output Impedance: 600Ω Sampling Rate: 44.1K Sampling Accuracy: 24bit Power Supply: DC 9V(external positive and internal negative) (not including adapter) Current: 320mA 1 x Effect 1 x User Manual 4 x Foot Pads