Oh, but in answer to your question, I have two Music Hall Tube DAC 25.2s and a Grant Fidelity Tube DAC 09. I like my MH DACs much better in my stereo systems than the GF DAC, but that one works great in my computer system, so all is good.
I am using a music hall too. I been thinking about getting a GF tube DAC9 too as it has an RCA input that I would like to try with a satellite radio plug and play.
for your stereo setup, did you find the difference between the music hall and dac9 to be nite and day?
Hbar
In answer to your question, I tried the GF Tube DAC-09 in a large room system and it was a matter of the soundstage not being equal to the MH DAC. Also, to be fair, both of these DAC's when swapped in and out of that system, were both brand spanking new and not broken in yet. Who knows, with the break-in time, the GF DAC may be just fine. I'll swap them back out again during Christmas break and see what I think at that time.
Here's a picture of the system:
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Retro