No problem to drive a old planar like the LCD-X. Low gain, 50% volume and great sound. The DTR1 and the HA-2 is a powerful and revealing combo. It makes a good match with the LCD-X. I would be cautious using a bright headphone with that dap/amp combo.
Interesting are also the 2 blue dots. I first did not connect the 6.3 to 3.5mm adapter properly and eventhough the sound was ok, the blinking blue lights informed me that the connection wasn't perfect. Nice!
Using the LCD-X with that combo is a very satisfying experience. Clean and detail sound, the LCD-X is not veiled at all. But, to be honest, there still is a distance from a mid-end desktop set-up as I usually use (Isotek Aquarius, Denafrips Ares and Violectric V280), when listening to CDs or digital files via Audirvana.