Prize: 189 Euro.
 
DAC performance is less good as you can read in many other reviews. Personally I find the DAC good enough. But then again, I do not have another to compare.
Connectivity is just good. Able to power 600 ohm DT880 without problems.
 
Bluetooth connectivity is not recommended, it raises the noise a lot. Bluetooth operates around the same frequencies as WIFI , Microwave, etc, etc.
But USB connectivity is very good. There is hardly any noise then.
 
The amplifier itself. First I thought it was medium good quality. But after comparing the same setup with my new Schiit Valhalla 2 I can only say that the E5 does not amplify the sounds good enough
to justify this premium prize of 189 euro. Voices sound airy, Bass less present, High sounds less sharp, Guitar strings sound if they are not tightened well. And I hear an echo in some cases.
Overall it's not worth the prize and purchase. Really an disappointment as I have bought Soundblaster since I used a 386 computer sound-card. But then sound quality was not an issue for me. Nowadays I focus more on quality
 
What is the reason to buy this DAC if the improvement is little? Not recommended.