Thermionic Labs makes a series of transformers specifically for headphones. https://www.thermioniclab.com/en/headphone-transformers/ as does Van derveen https://www.mennovanderveen.nl/index.php/nl/producten/other/vdv-800-v-hph-detail Looks like it would be easy enough to have a selector switch...

My Oppo portable Dac/amp has died and I need to replace it. I use an iPhone 11 Pro Max with 320 ohm Beyerdynamic DT-880 Pro headphones. Looking around it looks like I would need to use the camera connection kit to connect to the DAC instead of the regular charging cable. Why are manufacturers...

I bought my first pair of "real" headphones in 2004 or so. They were Sony cd3000. At the time they were the most ridiculously priced headphones I had ever come across. I laughed at my dealer but then I tried them paired with a mini max headphone amp and I was smitten. 10 years on and it's...