Letshuoer EJ07 Review

Letshuoer EJ07 Review

For the past few months, we’ve been making our way through Letshuoer’s extensive catalog of IEMs. The EJ09 was the last product I reviewed from this line, and it was a big hit with me. They have the EJ07 as well, which is the next step down in price. These IEMs cost $899, which is still a steep price, but more reasonable since this is still considered their high-end selection.

Letshuoer EJ07 items

What You Get

  • Stock cable
  • Carrying case
  • 2.5mm balanced to 3.5mm adapter
  • 2.5mm balanced to 4.4mm balanced adapter
  • Foam tips * 2 pairs
  • Silicone tips * 3 pairs
  • Warranty information pamphlet

Letshuoer EJ07 single

Look & Feel

I haven’t been let down by Letshuoer yet in the design and comfort department. They always bring something original, and with the EJ07, Letshuoer gives the housing medical-grade resin. With this design, the EJ07 aims to be more of a professional IEM that prioritizes durability and security. This gives the EJ07 a good seal with long lasting comfort.

Letshuoer EJ07 cable


The EJ07 combines a 10mm dynamic nanocarbon driver with electrostatic and balanced armatures drivers made by Sonion. Two of these Sonion drivers are 2389 balanced armatures that act as mid-woofers. Four additional drivers are Sonion EST65QB02 electrostatic units, and everything is organized by a three-way crossover.

Letshuoer EJ07 pair


A lot of the EJ07’s soundstage comes down to how everything is positioned. At this price, it’s not the greatest width I’ve heard nor the most holographic stereo experience. However, everything coming through the EJ07 feels like it has a distinct identity. Performances never feel too far apart, but the level of separation here adds plenty of room for the sound elements to breathe. There’s depth to its layering, but with most tracks, it falls into a more traditional stereo IEM image. Good height is still achieved though, and it feels like the compositions stack on each other in an easily articulate fashion.

Low End

While I find this bass to be pretty reserved, it does highlight some sections very well. More depth and dynamic potential is achieved this way, but it also limits some of the more fun parts of the response. If you’re looking for a solid punch then the EJ07 will happily deliver it. The mid-bass never stops providing impact to the sound signature, as it is the most consistent representation you get out of the lows. They’re tight and excellently controlled. However, there isn’t a lot of lift to the tone. Sub-bass frequencies are a bit too subtle and add very little flavor to the timbre. As a result, nothing appears very big, but clarity is still a major strength.


For the most part, the timbre of the midrange is very clean. However, some sections can get a little clogged up and rowdy. Everything is still well organized and roomy, but the frequency content can overemphasize some regions of tone. It feels less like expression and more like uncontrolled resonance. If you can get past that, there is a ton of detail to enjoy here, and the instruments appear very alive. Individual notes come down with a clear strike, and it does so in a transparent way. This makes the response come off as a bit clinical, but I think that plays to the EJ07’s positive characteristics.


There are some slight dips here and there, but for the most part, the highs have a lot to show. The frequencies operate with a fine balance, but sports of brightness still make their way through. Good control is still achieved with this brightness, so it’s never harsh. If you like to feel the treble a bit more then you should definitely be satisfied here. You get a sense that the timbre is very refined up here, and it makes the sound signature more detailed as a result. It offers a good tail to most performances, but there isn’t a clear shimmer to them. That’s were the brightness can loose some listeners, but I think it’s handled well here.


There is a very particular sound that the EJ07 is going for, and for the most part it suceedes. It’s not going to be for everybody, and Letshuoer knows exactly what the EJ07 is best used for. It’s high point is the separation and layering, but the sound signature doesn’t have much personality it, and that’s by design.

Pros  Cons
  • Great separation 
  • Accurate imaging
  • Clear bass
  • Clean mids
  • Detailed highs
  • Good seal
  • Overly clinical at times 
  • Lacking sub-bass

The Letshuoer EJ07 is available from Audio46.

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Alex S. is a sound designer and voice-over artist who has worked in film, commercials, and podcasts. He loves horror movies and emo music.