Why? What are you hoping to hear?
- 107 Posts. Joined 9/2013
- Location: Texas
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you wouldn't be able to tell that way, whatever is sampled will will sound like whatever you are listening with
The Vali is a slightly warm, slightly lush, clear sounding amp. It works best with high ohm (250 and up) headphones. Headphones with lower impedance are going to tend to be noisy on the Vali.
My HE-500's aren't noisy with the Vali. It depends on the sensitivity, which many low impedance cans are not that sensitive. IEM's are in general more sensitive.
1) If by "running in" you mean burn-in, no - not to my ears, at least,
But warm-up, yes. I find the sound a lot more "open" and engaging about 20 minutes into my listening sessions. Tubes and all that. The amp gets pretty warm to the touch. But not fry-an-egg-on-top-of-it warm like they say Asgard does.
2) Yes, just use a 1/8 to RCA cable to feed your DAP or DAC into the Vali.