thanks.

someone in a chinese forum said the stax goes much deeper in bass.

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...

that's a bad idea to connect them together.

there's an project in headwize to diy electrostatic headphone. i don't think it's possible to diy dynamic headphone.

Quote: Originally posted by grahamndodder Right now I am planning on the 24 awg solid copper from CAT5e wire (from which I make my interconnects, which I like) because it is spec'd at 99.99% OFC wire. It is also dirt cheap! Given what I have heard here, that would seem to be just as...

http://www.homegrownaudio.com/diy_silverwire.html What kind wire to use will depend on current and frequency.

red black i guess, it is a balanced cable, so there's 3 wires. a better diy cable IMHO. http://www.venhaus1.com/diysilverinterconnects.html

http://www.dspguide.com/pdfbook.htm

yes. see figure 5. http://focus.ti.com/lit/ds/symlink/lm317.pdf

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

Quote: Originally posted by digi01 I have consulted the structure of EVM PC BOARD of TI, signal ground , power ground , and shielding ground is separated. PCB was carved with the craft knife how to seperate grounds? using resistors or ferrite bead?

why need lifetime? new technology is being out all the time.

sears' DMM is cheaper.

Do you mean IEC filter? It is around $10.

I believe the noise will be reduced.

just use 2 meta42. each board serves one channel. the volumn control needs to be reworked.

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.

Quote: Originally posted by Tomo Hey, I would avoid anything with "audio" written all over it. They are most commonly poor in quality. Look at THD, for example, 0.4%. OPA134 gives like 0.001%. You do the math. Tomo The load is different.

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

so i can use any speed external crystal?

I am confused by DIR1703's PLL1 100Mhz clock, does that generated from external crystal?

good luck on your exam. let's discuss tomorrow.

Just back from theater, matrix reloaded isn't too bad. So in pll mode, the output clock will follow the source, why the crystal speed will matter? I am thinking run the dir and mic by one crstal or clock.