Fiio FT1 into Emotiva a2m

Hi,

After a lot of research i've decided to order a pair of Fiio FT1 and use it with my current speaker amp. the Emotiva a2m combined with SMSL SU-1 DAC.

Here's my question, the emotiva a2m has a 6.3 mm connector and the cable included with the Fiio's has a 3.5 + 4.4 mm cable included. What would be the optimals solution here? Does an adapter degrade the sound quality in my case?

Many thanks!

Edit: If you have experience with diffrent cups for these headphones, suggestions are welcome :)