Features: Preamplifier tone board have reasonable circuit board layouts, small noise, beautiful component layouts. Better performances,noise is very small. The mainfiltering capacitors adopts ELNAcapacity of 3300UFx4, and adopts 2A and above rectification. Volumes control Amplifiers board with opamp ICsocket, convenient to upgraded for flexible use. AC12V double powersupply voltages. PCB1.6mm thick double side sheet metal, with a thickness of 2.0A and a full process of tinssprayings, ensuring good performances in passing large and small current. Adopting a fully enclosed dust-proof potentiometer, the performances is more stable and more wear resistant than ordinary potentiometers. Specifications: Material:ABS Voltages:AC12V-0-AC12V Size:Approx.140mm/5.51''x66mm/2.6'' Potentiometer from left to right: trebleadjustment - midranges adjustment - bassadjustment - main volumes control Package Includes: 1x Tone Control Board note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color.