- Aug 8, 2010
Basically, I was just running the S1 with my iPhone with Westone UM pro 30, and the audio sounded very distorted and degraded. I haven't plugged in any headphones or IEM through the headphone out ever again since, it was just unbearablely disturbing to listen to. I do not believe it can output the signal unaltered, although I have not tried it with my M2. I'm definitely quite happy now using the 2 headphone outs from my Focusrite Clarett and MrSpeakers Ether, works like a dream so I'm quite happy with that.
According to the manufacturer: "[COLOR=252525]The SubPac passes audio through to the headphones without adding or subtracting signal. It does not act as an amplifier. Keep this in mind when placing it in the signal chain."[/COLOR]
Maybe your unit is degrading the signal even though it is not amplifying it.
Here is the link.
It also states: "[COLOR=252525]The SubPac is matched for headphone impedances 32ohms and under, which pairs it with the wide majority of headphones on the market. For higher impedance headphone users the best practice is to split the source signal to the SubPac and use a dedicated headphone amp.[/COLOR]"