Product parameters:
Power supply :DC5V-12V
Interface :DC5.5x2.1/3.5mm
Input impedance :20K
Output impedance: 600Ω
Equalization circuit control range :±12dB
Balance frequency band :60Hz, 150Hz, 400Hz, 1KHz, 3KHz, 6.5KHz, 15KHz

1, seven stage balance adjustment range ±12db, composed of TI or ST original TL074 circuit
2, 60 hz, 150 hz, 40 ohz, 1 KHZ, 3 KHZ, 6.5 KHZ, 15 KHZ, seven frequency knob in the middle of the origin, counterclockwise for attenuation, clockwise for ascension; 60HZ for bass, 150HZ for bass, 400HZ for bass, 1KHZ for alto, 3KHZ for treble, 6.5KHZ for treble, 15KHZ for super treble, according to personal listening preferences to adjust.
3, pre-amplification gain :4580 classic op amp provides 5 times amplification (14db); The earphone part adopts the 47 earphone driving circuit composed of two NE5532, which can easily drive all types of earphones from 16 euro to 600 euro; Input impedance 20K, output impedance 600 OHMs;
4, 3.5mm input and output interface support 3 /4 pole plug, headset with microphone can be normal voice call on the phone, suitable for game lovers and music lovers, another group lotus interface terminal is available
5. Power supply: between DC5V-12v, the interface specification is 5.5*2.1, 5V power supply is static current 390ma, 12V power supply is about 14Oma, power consumption is about 1.8w.

Package Included:
1.*EQ-7 Audio Signal Headset Amplifier
1*12V Power Adapter