I recently got the new Schiit Lyr 3 with the phono module. It sound great, though the noise floor when switched to phono seems sort of high. It’s definitely the module, when I switch to the line in it’s pretty much dead silent. It’s also interesting that when I unplug the turntable, the noise...

I know this isn't technically a headphone amp, but this was the closest forum I could find. I'm debating buying a Saga and am wondering if switching it to passive mode turns off the tube (i.e., the heater). Or does it keep running so you can switch back at any time without delay?

There are a number of DACs with batteries, which makes sense. What I wonder about though is how long these batteries last before they die, especially if the DAC is mostly kept plugged in and used in a desktop setup. This tends to be really bad for abtteries. Is this a concern at all, and what's...