Computer output to DAC, which route?

I am just starting to look into this. My constraints are a PC running Windows or Linux, listening through old Stax headphones connected to an integrated amp a couple feet away from the computer, and very low budget, say, around $200. By the way, all my PCs (purposely) have FireWire on the motherboard, and I do have an old D/A converter I can use to get started. I would be looking to upgrade as money permits, but this won't be right away. Obviously, I wouldn't be able to afford the best USB interface.

So in this context, what is the best way (in terms of sound quality) to get sound from the computer? Would it be better to get one of those integrated USB/DACs with built-in cable? If so, I'm guessing this would mean money down the drain when it comes time to upgrade.

Also, many mention that using coax or toslink from motherboard is not a good idea, but I don't see a justification for this other than USB is the way to go. Why is it that coax/toslink from the motherboard is inferior? On my computer at work I at least don't get constant ticks and pauses like I do when using the cheap USB->coax adapter I got several years ago.

The "U" in USB stands for Universal. IEEE 1394 (Firewire) is NOT universal. Most motherboards have dropped support for it. And so are most DAC vendors, sadly, have too. Universality often wins out over quality.

Motherboard based Toslink & RCA SPDIF signal paths are cheaply made, and sound that way... to me, at least. Even with the addition of a galvanic isolation transformer. I have listened to a dozen or more of them feeding a WEISS DAC 202, among others. (This was my job for a period of time) Consider that the entire motherboard costs $100, and they have to include a lot of other parts for those 100 dollars.

I'm not sure how to best invest $200. What inputs do you have on your "old D/A converter"? For less than your budget, a USB based M2Tech HiFace2 will get you RCA or BNC SPDIF out with quality clocks and galvanic isolation.

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USB is pretty pathetic. Firewire does blow it away. For $200 - heck - $150 - just get an ESI Juli@ soundcard. it blows away the usb at a much lower cost.

USB sucks - plain and simple. Use it to connect your mouse and printer, not a dac...

Don't believe everything you read. USB is great if you select the RIGHT USB interface. Beats 99% of transports at any price. Just get an Off-Ramp 5 and Dynamo power supply. It blows away everything, including the very best PCI cards and Firewire interfaces.

PCI cards suck, plain and simple. I have had most of them, including the $2K Lynx and RME cards. Most of them have PLLs for the Master Clock allowing them to sync to an external word-clock. Really bad idea. Only a free-running Master Clock oscillator is capable of low jitter. My customers send these PCI cards to me to test with my reclockers because they have such high jitter.

Here are some customer reviews of good USB interfaces:

http://www.empiricalaudio.com/news-and-reviews/off-ramp-converter

http://www.empiricalaudio.com/news-and-reviews/overdrive-dac

Steve N.
Empirical Audio