Product description:
1. Original disassemble OPA2604+AD827JN
2. Panel light interface, there is a string resistor on the circuit to the power supply can be directly LED light.
3. Size: 120X63MM, the highest point is the large capacitance, plus the plate thickness is about 25MM.
4. Reserved MP3 power supply seat, can not be directly connected, need to string a small step-down board, because the MP3 Bluetooth decoder board requires a variety of voltages, through the buck board to achieve the required voltage, such as 5V/12V.
5. The two blue plates on the board are adjustable to adjust the positive and negative voltage of the operation. The blue color on the side of the board is adjusted to the positive voltage, which corresponds to the 8th pin of the op amp. The adjustment is to adjust the negative pressure, corresponding to the fourth leg of the op amp.
Take the positive pressure as an example: the multimeter is placed in the DC file, the black pen is inserted in the middle of any blue three socket on the board, and the eighth pin of any one of the op amps on the red meter plate is adjustable. The required voltage is all right. The negative pressure method is the same as the positive pressure, and the measuring amplifier is 4 feet. If it is a pointer table, please change the red and black test leads when the amount is negative pressure. The anti-pointer is reversed, and the digital meter can be used. The voltage has been adjusted and tested before shipment, no need to adjust.
6. Potentiometer spacing: 24-24-35MM
7. Power supply: Dual AC12-18V
8. Supports pass-through/audio mode switching, unique mid-range pass-through function
9. Knob function: from left to right, treble / midrange / bass / volume
Note: treble and midrange potentiometer with switch, reset function
The treble is rotated to the left and the pass mode is the pass-through mode. The pass-through mode is only for zooming in.
The midrange is rotated to the left and the middle frequency is the pass mode. The medium frequency direct mode, the bass is purer.
Package included:
1Pcs OPA2604+AD827JN tone board
