module name:amplifier pre plate
Input power: AC 12-18V
the board uses dual op amp adjust the sound, Circuit is divided into two parts, The first part of the OP is responsible for buffering, The second part of the OP using negative feedback to adjust the volume (each one responsible for a channel op amps), Solve the input impedance changes when adjusting the volume of the phenomenon
the use of single-point ground wiring, Improve the signal to noise ratio and interference, Great extent eliminates the current sound

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Width : 2.76 inch
Height : 1.18 inch
Length : 4.33 inch

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ASIN : B010L7VDFW