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Cosecant USB DAC v3 (now with ASYNC mode) and the Benchmark USB DAC 1

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Now that both the Wavelength Cosecant USB DAC v3 (now with ASYNC mode) and the Benchmark USB DAC 1 and DAC 1-PRE support 24-bit audio at sample rates up to 96 kHz without the installation of any drivers or other special software. I am having a hard time choosing between them. My primary headphones are the Ultrasone UE 9 and the Grado GS 1000. Has anyone out there heard both side to side at any of the meets??? Are there specific advantages of one over the other?

Why did Benchmark choose not to implement the asynchronous mode of USB ???? Is this really a better way to go?

There is a big price diff between the two and the Benchmark gives you a preamp and headphone amps to boot!

asynchronous mode of USB is pretty cutting edge which is why they don't have it yet.. they probably will license it at some point.

If you are just going balls out sound quality then I'd go wavelength easy... if you are into the features than yeah benchmark

Why did Benchmark choose not to implement the asynchronous mode of USB ???? Is this really a better way to go?

IIRC, the async USB does a much better job of minimizing jitter. Gordon Rankin (wavelength) discusses this quite a bit on diyhifi.org, if you care to look.
It's not his first post here. He posted before on the old forum software, but his posts were deleted because of forum software malfunction. I don't see anything wrong with his post.

My bad. Sorry, just a wee bit suspicious of everyone nowadays for some reason.

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