I analyzed Traillii paired up with LPGT while playing a variety of test tracks, such as Agnes Obel “The curse”, Sandro Cavazza “So much better” (Avicii remix), C-Bool “Never go away”, Ed Sheeran “Shape of you”, Alan Walker “Darkside”, Galantis “Hunter”, Iggy Azalea “Black widow”, Indila “Boite en argent”, Dua Lipa “Love again”, Counting Crows “Big yellow taxi”, David Elias “Vision of her”, and Michael Jackson “Dirty Diana”.
To my ears, Traillii has a big open sound typical of full-size dynamic driver headphones with nearly a holographic soundstage expansion. The soundstage and the imaging are the first things that stands out when you start listening, feeling like you are right in the middle surrounded by the sound, able to pin-point and “touch” every single element in space due to a rather accurate and realistic placement of instruments and vocals. And thanks to a very good layering and separation of the elements in 3D space, every sound, every nuance is easy to distinguish and to focus on.
I usually don’t start my sound analysis with soundstage description or the talk about layering and separation. But since I did, some could probably assume that Traillii might have a more reference quality analytical sound. After getting over the initial soundstage impression, you realize the tonality is very natural, with a full body organic sound which at the same time has a rather good level of detail retrieval approaching nearly a micro-detail level, not a typical combination for IEMs which don’t have analytical tuning. We are talking about a natural tuning with a balanced W-shaped signature where the bass, mids, and highs stand out in their own domain and blend in a coherent harmony.
To break it down further, each bass note is weighted with a deep textured sub-bass rumble and tighter dynamic-driver quality mid-bass punch. During my listening sessions, quite a few times my brain got tricked into thinking I’m listening to a dynamic driver bass performance even though Traillii has 2BAs to cover low end. The bass was so visceral and hitting with such well-articulated authority that for a second, I felt like I was listening to a powerful dynamic driver. But at the same time, while bass is powerful and elevated, it is not overwhelming to a point where it overpowers the mix. The bass is there, it hits hard with authority and control, and it does feel like DD performance with a little slower attack and longer decay but without spilling into lower mids. This is not L-shaped tuning, it is W-shaped, though I still think it will satisfy equally bassheads and audiophiles with a basshead fetish, but stay clear if you want a more neutral bass.
Mids are very natural, soulful, organic, and at the same time quite detailed and layered. Lower mids are above neutral, giving a fuller body to the sound and also helping bass to blend in more naturally with upper mids. It has just the right amount of quantity and tuning quality to make sure the overall sound is not muddy or veiled considering the organic nature of the tuning. Upper mids are very detailed, I rare combination of being close to micro-detailed level without being cold and analytical. Vocals sound very natural and realistic as well, regardless if it is male or female. And again, after the extended listening I almost forgot that these are BA drivers because of the organic texture of the sound which is more typical of DD performance.
Treble has a very natural balance of clarity and airiness, excellent extension, and a well control sparkle without a hint of harshness. It was hard to believe there are 4xEST drivers because the tonality of the treble was so natural, so well defined and well controlled without any harshness or sibilance, and yet fine-tuned to be extended, super clear, and well balanced with the rest of the frequency spectrum. For me personally, Traillii treble tuning really hit the sweet spot because I’m really picky about the treble and harsh upper frequencies drive me nuts.
The two things that really stood out for me was a natural holographic soundstage and the coherency of the 12-driver hybrid tuning where BA-bass, BA-mids, and EST-treble were in a perfect harmony, sounding like full size open headphones with one large dynamic driver. And also, I was impressed how well the sound tuning scaled up at low and high levels of volume. With some IEMs raising the volume up brings mids more forward, or while listening at lower volume pushes mids back and brings up bass more forward. Here, the relative tuning balance stayed intact as I was varying the volume up and down.
The selection of eartips is crucial with any universal in-ear monitor and will affect the sound, especially the bass impact depending on the seal and the soundstage depending on insertion depth. Due to a large opening of my earcanals, I usually go for the largest size eartips to get a better seal. Please, keep in mind, these impressions are subjective and relative to my ear anatomy which affects how I hear the sound.
Stock silicone tips – gives sound the best balance between lows, mids, treble; my baseline natural detailed tonality.
AZLA Sedna – adds more sub-bass rumble and lifts mid-bass higher, great if you want even more bass impact.
JVC Spiral dot (original) – these shrink the soundstage a little bit; soundstage is still wide but not as wide which loses the holographic effect.
Final Type E – the narrow bore opening here messed up the sound, vocals became congested and a bit muddy and soundstage was narrow.
Symbio F – was surprised how well these fit Traillii thick nozzle; and found a very interesting effect of bass being a little attenuated, especially sub-bass, while mids/vocals being a little brighter, more forward, and more transparent.
SpinFit – similar to Symbio F, bass has a little less sub-bass, bringing more focus to mid-bass, and vocals are a little brighter, more forward, and more transparent.
After I shipped out Traillii, I realized that I forgot to take pictures with various eartips.