ADI-2 DAC‘s IEM port has a separate, completely independent amplifier.

From your description it might indeed be broken.
What exactly was flickering?
You’re sure the IEM doesn’t have a short, it works on other amps?

If ADI-2 still works with the 6.35 mm output you can use it without having to fear it will break your ‘phones.
There are protections built in to prevent any misshapen.

If your ADI-2 is under warranty I’d suggest to get it repaired, and even without warranty get a quote from RME service.

Hi, are you sure?

I can't remember anything about the ADI-2 DAC's IEM port in combination with "Pentaconn".

AFAIK, the IEM Port of the ADI-2 DAC has an 3.5 mm audio jack (TRS).
The Pentaconn plug has been newly introduced to the ADI-2/4 Pro SE for "normal" balanced headphones (not IEM).

Unfortunately, I do not find any information in the ADI-2 DAC FS manual regarding whether IEM is 3.5 mm or not.

There is already a thread about this topic:
https://forum.rme-audio.de/viewtopic.ph … 08#p195308

Please be so kind and double-check your statement. Thanks.

Thanks for the replies, the screen kept flicking to power failure then the normal volume and back to power failure about twice a second. I could hear a clicking (relay?) inside the device.

Sounds like it's hardware related.

The IEMs work with my phone and tried a couple to be sure. I'll enquire about a repair.

Very supportive and useful forum. Thanks all.

That's the message that displays, it flicks on and off repeatedly with an audible clicking too.

I've unplugged the power supply and put it back in, has the locking pins turned and seated correctly, no silver showing. The other features all work OK, line out and 6.35mm headphone output. Just the IEM port that causes the issue.

Just tried again as I checked the the buds I used and were dead on one side. So found my old sony buds, checked on my phone first, no issue played fine, plugged them into the DAC, power issue didn't show, horrible crackling in the right side, left bud warmed up to the touch and when putting back into the phone the right driver is dead.

Not putting anything else near it, I hope it didn't kill my IEMs, I thought the protection within it should prevent this.

Edit: Sadly it has killed those as well, one side is less than half as loud than the other, includes when switching cables... Sony's are cracking away like they're in a frying pan and the cheap buds knackered too.

Lesson to anyone else, if the power error message pops up when using the IEM out, get the IEMs out ASAP and do not put anything in the port.

Hopefully RME will repair and find the cause.