N6ii E01 Digital Audio Player

The E01 motherboard uses an ES9038PRO DAC chip as well as Class A/AB amplification.

The E01 is superior to both A01 and T01 modules in terms of raw audio performance. Tonality-wise it sits between the other two but does just about anything slightly better.

The bass is quite similar to this of A01 when using a Class A mode. It’s thick, powerful, and engaging, but has a better definition and is more accurate. The AB mode tilts towards the T01, but yet again with better detail and texture. Both provide great low frequencies though, with a fantastic sense of rhythm and that punch to die for. It pairs especially well with Vision Ears Elysium, which lacks that low-end punch and richness, because of using a single armature driver for the bass response.

The Midrange is where things are obvious – It’s as engaging and lovely as with the A01, but it also has better separation and the timbre is even more natural. Mid frequencies sound really Class A-ish, providing both warmth and striking technical performance. Doesn’t matter if you’re into male or female vocals, both sound great on E01 in both A/AB classes.

The treble is more pronounced than the A01 and slightly less than the T01. Thanks to that, it sits just perfectly in between, and that’s the best thing possible, as it’s truly a marriage of the best of both worlds. Also, the detail, airiness, and resolution beat the other two by quite a margin. It just sounds like it’s supposed to, neutral yet natural, detailed yet forgiving. That makes it a great company for a lot of IEMs on the market.

The soundstage is yet another thing that sits above both A01 and T01. It’s more spacious with better imaging and separation. What’s important though, is that it can also sound intimate in music that’s mastered that way, providing a great staging performance with just about every genre you’d like to listen to.

Taking all that under consideration – I recommend getting the E01 if you’re after the best SQ possible, as it’s just technically superior to both A01 and T01 while still maintaining that Caying house sound – musical, smooth and engaging.

Consider the A01 if you’re into laid-back and intimate playback, or you love Campfire Audio Ara and would like to tame them just a little bit in the treble and upper midrange frequencies.

The T01 is my least favourite out of the three, and I’d consider it only if I wouldn’t want to spend more on the E01 while needing a more neutral and brighter presentation than the one found on A01.