Insert an amp meter between the OEM PSU and the device.....What's the current draw of the device when it's "driving" your "fairly high powered headphones"?
It's actually a very easy "problem" to solve with a little DIY
I actually don't really see any easy way of doing this besides cutting the + lead on the adapter cable and inserting my multi-meter there. I could solder it back together easily afterwards but I don't really want to cut it in the first place.
The other issue is that I don't really have the fairly high powered headphones that I want to be able to power as of yet - the idea is that I want to be futureproof - I guess I could ballpark it though with my current headphones.
amb wrote:For what headphone amp? If you're referring to just the Audinst HUD-MX1 (USB DAC with headphone amp), its factory adapter is rated 15V 0.5A-1A, which means 15V * 1A = 15W. Giving yourself some headroom for transformer losses, I would recommend at least a 20VA transformer. The transformer you're looking at is only 2.7VA. Way too small.
Yea figures I guess...EL30 transformers were only meant for low power applications anyway...
I'm leaning more along the lines of getting something like this now: https://system.netsuite.com/core/media/ ... 5&_xt=.pdf
Using a wall transformer like that I'd be able to locate it further from the actual power supply to minimize interference and save myself some space as well - the 1A rated wall transformers are quite gargantuan though really so I've been wondering if the Audinst HUD-MX1 can really possibly draw a whole amp at peak. If possible I'd like to get away with something smaller like their Triad Magnetics' 400mA rated product.
I've asked Audinst about this as well but haven't received a reply yet - hopefully they'll know something about the real-world power draw of their product.
Thanks for your responses guys.