I own Sennheisers 280 HD Pros and have just ordered Sennheiser 598s (haven't received them yet though). I had previously purchased a Cmoy portable headphone amp (OPAMP 2227) and it worked pretty well. I have now purchased the Fiio E10 and I love its DAC capabilities. However, I was curious how the amp included in the Fiio E10 compares with the Cmoy I purchased with its particular OPAMP.
Also, just to confirm, the Fiio E10 has a line out port. Does that mean if I connect it to another amplifier (say my Cmoy), I get both the DAC features of the Fiio E10 and the amp features of the external amp? Using the line out port as opposed to the headphone out doesn't stop the Fiio E10 from functioning as a DAC right? It just stops it from using the E10's amp? If the Cmoy is superior to the E10, I may consider using the line out and connecting it to the cmoy if I can still get the DAC capabilities of the E10 as well.






