MiuAudio insist, is designed to provide high-performance, low-cost products.
So Miuaudio launched a new headphone amplifier: MRC.
It designed a beautiful shells. Power supply, it uses a 9V battery. Do precision 1% metal film resistor divider and operational amplifier virtual ground.
MRC circuit using the TL072 as a preamp, TL072 is a low-noise JFET input op amp
The MRC this circuit designed class AB push-pull amplifier Darlington.
Line Cadogan pair of cylinder common-emitter amplifier, MRC design to portability, the push-pull amplifier input impedance will reduce the equivalent collector resistance of the driver amplifier. The gain of the driver amplifier which will significantly reduce its voltage gain, its voltage gain will also be significantly reduced. Thus a push-pull amplifier using Darlington transistor can be increased relative to its input impedance of the driving amplifier, to avoid substantially reduce the voltage gain. So we choose 2N2222/2N2907 metal package transistor as to promote.
Two diodes in the line transistor is biased at about 10 Ma, can drive the headphones you need to promote easier.
All native resistance more good selection of 1% metal film resistors reduce circuit internal only noise.
In order to better fidelity applications will use low-ESR capacitors improve the frequency response.
Of course, the volume associated volume potentiometer switch, has always been one of our main parts.
There are two colors can provide optional: black, red；