Anson/Dethonray are great, love his products, but H1 is $700 and WAY too much power for IEMs, I tried it for 5min, it sounds great by unusable for most of my IEMs, so I sent it to another reviewer on Tw6 who will test and review it with full size demanding headphones. W2 is better for IEMs and easy to drive headphones at less than 1/2 the price. Plus, W2 will have EQ, dsp effects, etc and it is just a tiny pocket friendly usb dac/amp device. I didn't even measure H1 current draw when connected to smartphone.
Does that help with a decision? And I'm assuming H1 is Dethonray Honey H1, unless you are talking about something else?