Yes that's what I was thinking. Just to make use of the eq and all those cool settings. Would fit perfectly with mojo. I could possibly stack it next to the Mojo, since they are both small and it wouldn't increase the overall thickness.
Doesn't the EQ work only when it is used as a DAC? Are you saying you would use the E1 as a DAC from (computer? phone?) and the Mojo as an amp?