Graz
500+ Head-Fier
- Joined
- Apr 3, 2004
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I want to gut my m-audio transit and connect the s/pdif output from that card directly to the input of my ciaudio vda-1 DAC via a very short (2-3 inch) direct connection.
I need some advice with the following questions...
- What about the short cable length, and it's direct impact on jitter? I've seen that long cables are supposedly better for s/pdif...what about very short connections...is this a bad idea?
- What about the 75 ohm termination? How do I ensure that the termination is properly implemented on this short connection?
- What about galvanic isolation? Is this a must have, or should it only be used on a case-by-case basis...i. e., use it if I have a problem with hum?
I've contacted Steve Nugent at empirical audio (www.empiricalaudio.com). He will perform this exact mod, but he wants $350-400 to do the work (which includes the cost of the USB audio solution...transit-based I believe...and the mechanical work to add the USB connector directly to the DAC enclosure). When I respectfully asked if he would consider dropping the price a bit, it was clear that he wasn't going to budge. Consequently, I've decided to try to do this myself. I can easily do the soldering, wiring, and enclosure work myself...and the total out-of-pocket expense for me would be negligible since I already have the USB sound card & the DAC. I just need a few key questions answered...
Thanks in advance for any advice with this!
Peace,
Graz
I need some advice with the following questions...
- What about the short cable length, and it's direct impact on jitter? I've seen that long cables are supposedly better for s/pdif...what about very short connections...is this a bad idea?
- What about the 75 ohm termination? How do I ensure that the termination is properly implemented on this short connection?
- What about galvanic isolation? Is this a must have, or should it only be used on a case-by-case basis...i. e., use it if I have a problem with hum?
I've contacted Steve Nugent at empirical audio (www.empiricalaudio.com). He will perform this exact mod, but he wants $350-400 to do the work (which includes the cost of the USB audio solution...transit-based I believe...and the mechanical work to add the USB connector directly to the DAC enclosure). When I respectfully asked if he would consider dropping the price a bit, it was clear that he wasn't going to budge. Consequently, I've decided to try to do this myself. I can easily do the soldering, wiring, and enclosure work myself...and the total out-of-pocket expense for me would be negligible since I already have the USB sound card & the DAC. I just need a few key questions answered...
Thanks in advance for any advice with this!
Peace,
Graz