Hot off the press: Yggdrasil review

Kernelbob, thanks for sharing your impressions. I definitely would not buy the PSA DS based on many credible reports. It may be designed for bright systems?

@Grannyring, I don't look at someone's activity level on a forum and use that as an indicator of their intelligence or experience, but YMMV. And I welcome dissenting experience - I simply prefer that it be of the firsthand variety, but again that's just me.

As for assuming that people will not run the unit 24/7, in fact Schiit has emphasized that the unit should not be powered off. It should be run 24/7 - once powered on for the first time, it should be left on. That's directly from Schiit.

Re the PSA DS, I didn't find fault with the frequency balance (at least in the 20 to 20k range), so no, I don't think that it was specifically designed for bright systems.

Keeping a dac on will do nothing to break it in. Need to pass a signal through it and many are not going to spin CDs 24/7. Just to much time on the transport for many of us. Computer audio...sure.

My experience is different. I find just having a DAC on will do most of the burn in (67.354689%...he he). The current running through most components in a class A circuit is constant. This constant voltage and current will burn in most power supply capacitors (which take the most time to burn in). The signal path resistors, and filter caps, transistors and tubes and especially the output caps in a tube unit will need to have signal run through them to fully burn them in. But even the output caps in a tube DAC will have high voltage on them....helping them burn in without a signal moving through them.

Having a signal go through the DAC while it is on will improve the sound further but most of the burn in can be done by just leaving it on. You need to have a load on the DAC output when burning in and playing music...this way some current is being modulated through the output stage as it has a load to draw some current with. Just keep your preamp or amp off and play music. Your preamp/amp has a load resistance to ground that helps pull current from the DAC.