Comments on Profile Post by batriq

I think you answered your own question but maybe try the MIB first?

One issue is that I have some transformer mechanical hum in the A2. Would nylon bolts help here?

So to be clear you only get transformer hum with the A2 boards installed and not the LIM? Seems weird to me maybe contact schiit. Otherwise maybe check for DC on the mains, that can cause hum.

They're two different units. The A2 is an older unit.

Ah right well if one has it and the other doesn’t, i doubt the difference in load on the transformer is big enough to cause this(LIM being a bit more efficient iirc). Again probably contact schiit. Maybe there is other stuff going on that’s affecting your impression of the A2?

yeah, one option is to get the chassis upgrade, let Schiit know of the transformer hum and get the boards at the same time. Exchanging them back to A2 will be easier.

The chassis upgrade should extend your warranty too

I have a new A2 from March, 2024. There is definitely noticeable transformer hum, and this with the Yggdrasil + improvements.