The E17 has the same Wolfson 8740 as the E07k. The WM8740 is known for its warm and slightly bassier characteristics. However, I have not heard the E17k before so I can't judge but just because they use the same DAC chip again, it could sound different due to many factors (implementation, output characteristics/power, etc)
No its the amp that makes it so bassy, the WM8740 is in a lot of Fiio products including the E7 and they all sound very different because of their amps.
Edited by theuprising - 7/28/15 at 11:47pm