i heard that this earphone sounds much better than er-4. anyone has it? i cannot find anywhere sale it.

I got one in compusa. But I guess I will return it tomorrow. The device working as a standard usb audio device, no extra features. I cannot output AC-3 signal as M-audio Sonica. I seriously doubt it is a 24bit 96khz device. It even does not sound as good as my laptop. It has more details, but...

I just saw an example of preregulated power suppy in TI's LM317 datasheet. Anyone tried that? What's the benefit of that?

Looks very good for single chip headamp. -120db THD at 600 Ohm load, very impressive, even Ad8610 is only -104db. and 50mA output really enough for any kind headphone without buffer.

http://focus.ti.com/lit/ds/symlink/tpa6112a2.pdf Differential input, 150mW output, very low THD. I guess it will sound better than CMOY.

For coupling capacitor which type is best? In wima's website, MKS(metallized polyester) is used for coupling. http://www.wima.com/applicguide.htm

want to build a power supply. Anyone knows?

How will the 30Mhz to 180Mhz differenct in music?

Can I bias 50mA on buf634?

Can I use it in headphone amp?

I saw an implementation of low pass filter by adding a capacitor in feedback loop on headwize's project. Why no one use this design to filter frequency higher than 200kHz? Will the low pass make sound more clean?

when i try to connect my bose mediamate speakers' headphone out put to laptop's line-in to do some measurement, but i cannot get any recording leve. Then i disconnected, use multimeter to measure the output, very surprisingly i got a very high DC voltage on output around 3V or higher and...

they are around same price, cannot decide buy which one.

my radioshack solder gun's tips melt in half hour, which type tips is good for smd?

Just bought a mint box today in bestbuy. How much will cost to build a mint meta42?

the 22 awg wire i bought from radioshack is just so hard. should i use 24 awg wire?

Just finished my first Cmoy a few days ago, not very satisfied with its sound. Since there's still space on board, is it worth to add another chip upgrade to an CHA47?

Here is the RMAA test result The green line is sound card of thinkpad x22, the white line is through the amp without any load. It seems the 0.1uF is too small for import coupling.