M-ST800P 
High quality Pre Amplifier Tone Control with Great Sound
Low Noise Transistors
Work from Single 24 to 30 Vdc Power Supply
Volume Bass Treble Control
Low Cut Filter Switch for Rumble Control
High Cut Filter Switch for Hiss Control

Order Option:
1. PCB with components Assembled Ready to Use
2. DIY KIT You need to Place and solder all the components
 High quality Product and reliability FR4 1.6MM PCB
Power Supply : 24-30Vdc (Recommended 27Vdc)
Current Consumption: 24mA
Input Sensitivity : 500mV-3V max.
Output Level : 500mV (Tone control at Flat Vol. at max.)
Freq. Response: 10-150000 Hz (Flat mode)
Bass Control: +/- 12db at 30Hz
Treble Control: +/- 12db at 15KHz
Low Filter: 8db at 70Hz
High Filter: 10db at 10KHz
PCB Size: 95mm*58mm double-sided HAL,FR4 1.6MM