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MiuAudio MRC Audiophile DIY HeadAmp KIt Will be on the market

post #1 of 8
Thread Starter 
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.

 

700

 

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;

 

700

 

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700

 

700

 

Red version

 

700

 

700

 

700

 

700

 

700

 

700

post #2 of 8
Thread Starter 

- Input Impedence: 10K Ohms unbalanced 
- Input: Audio in 3.5mm jack (left/right) x 1;
- Output: Headphone out 3.5mm jack (stereo) x 1; 
- 1 x volume knob included; 
- Operated by 9V battery (not included)
- Size: W51 X H21 X D74 mm (not knob)

Retail Price:US$49.00

post #3 of 8

Unable to find the MRC kit on the website, will this be updated soon?

 

How would we go about placing an order?

post #4 of 8

Are those 100uF output coupling capacitors that are next to the output jack? The circuit seems pretty cool but that seems a bit small.

post #5 of 8
Thread Starter 
100u not output coupling capacitor.Since the board is too small so I had to be placed in that position.
post #6 of 8
Thread Starter 

Soon on our website to start selling.

www.miustore.com

post #7 of 8
Quote:
Originally Posted by miu6 View Post

100u not output coupling capacitor.Since the board is too small so I had to be placed in that position.

 

That makes sense. This one looks good.


Edited by goodvibes - 10/29/12 at 3:19am
post #8 of 8
Thread Starter 

MiuAudio MRC has begun listing.

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