Item location : China
Type 1: DIY kit the kit need youself to solder and test.
Type 2: Assembeld board.
Type 3: Bare PCB ( handsel： 2 radiators + 1pcs 3P socket + 1 LED + 3 op amp sockets + 2 5-pin resistor + 2 DIP switches）
Monitor type adjustable multiple HiFi preamp
All Hi-End Audiophile-Grade components, the opamp default is using 3pcs opa2277
Amplification times adjustable:
- Switch ON1 / 3.7 times
- Switch ON12 / 5.5 times
- Switch ON123 / 7.3 times
- Switch ON1234 / 8.8 times
Pay attention to the direction of the op amp pin when installing ('口' symbol is for 1-pin)
5-pin resistor 'O' symbol is 1-pin
Polar capacitance long pin is + pole
Power transformer range: 10W-50W / Secondary voltage dual AC 12V -18V
Volume potentiometer: A type / 10k - 100k, Select as low as possible, High signal strength of the source can use 10k.
Suitable for matched with high-end amplifier! Do not rely on rendering to cover defects Monitor style!
Good control of driving force and low loss long-distance transmission is not critical over the signal line, do not have the transistor cold-hard sense.
Install the welding parts order
Small resistance - Row resistance - DIP switch - ic Block - Large resistance - Diode - Green Capacitance - Black 1uf Capacitance - Gold 100uf-Black 270uf - 7x12 Radiator - Indicator - Power Block - Large Capacitance / After checking is OK then power-on test / Done!!
If you don't have professional DIY ability, please choose the assembled board, We are not responsible for unsuccessful assembly.
