I bought ZX300 together with MDR-1ABP. MDR-1ABP is a 40 ohm headphone which ZX300 can drive it just fine at high gain but I need to set a volume a bit higher......maybe around 60-70. On the contrast, Audeze LCD2C is a 70 ohm headphone if my memory serves. So...well......I doubt ZX 300 could drive it alone. Maybe PHA-3 could be of help in this case though. Edit: I missed your part that you dont want to carry a separate dac/amp. You can ignore my PHA3 for a solution but you probably get the idea now. Hope you can find a satisfy solution soon.