Features 1、This amplifier board includes 10X preamplification as well as treble, mediant, bass and volume control. 2、2. Well selection of electronic components, adopt NE5532 operational amplifier, high quality potentiometer, 1% metal film resistor and non-polar coupling capacitor. 3、3. Equipped with an operational amplifier IC socket, convenient to upgrade for flexible use. 4、4. Reasonable circuit board layout, small noise, beautiful component layout. 5、5. Dual and regulated power supply. Specification Features: 1. This amplifier board includes 10X preamplification as well as treble, mediant, bass and volume control. 2. Well selection of electronic components, adopt NE5532 operational amplifier, high quality potentiometer, 1% metal film resistor and non-polar coupling capacitor. 3. Equipped with an operational amplifier IC socket, convenient to upgrade for flexible use. 4. Reasonable circuit board layout, small noise, beautiful component layout. 5. Dual and regulated power supply. Specification: Model: XH-M164 PCB Size: 105 * 54mm / 4.1 * 2.1in Package Weight: 73g Package List: 1 * Tone Preamplifier Package List