Description: _x000D_ _x000D_ This is a mature classic design,New optimization,Double side FR-4 1.6MM PCB Material,Each element from both acoustic and aesthetic point of view to consider,Whole board without jumpers,beautiful and practical!_x000D_ _x000D_ When users in the audio recording,the speaker unit and other equipment place is not necessarily perfect, pure passthrough preamp may not be able to meet the requirements,then add the tone adjustment becomes very important, if you have no extra power supply equipment, Passive preamp tone is preferred. It can adjust the treble and bass frequency effect is very obvious, let amplifier and speakers with more reasonably. _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ Features: _x000D_ 1.Contains 10 times the tone board preamp, and treble, alto, bass, volume control. _x000D_ 2.With op amp IC package socket, flexible, easy to upgrade, suitable for different tastes. _x000D_ 3.Board layout is reasonable, low noise, component layout nice, maximum to meet your critical eye. _x000D_ 4.Components carefully selected areas, the use of cost-effective than high NE5532 op amp, high-quality small potentiometer, Black Edition BP Promise coupling capacitor, 1 % metal film resistors, capacitors, etc _x000D_ _x000D_ _x000D_ Specifications: _x000D_ Model: NE5532 _x000D_ Supply Voltage: AC 12V _x000D_ Size: 100x43.5mm_x000D_ _x000D_ Type:_x000D_ _x000D_ assembled board _x000D_ DIY KIT(Need welding by yourself!_x000D_ _x000D_ Note: _x000D_ Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid _x000D_ Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! _x000D_ _x000D_ _x000D_ Package includes: _x000D_ 1set x NE5532 HIFI Preamplifier Control Board