I don't want to repeat packaging and physicals and focus on sound.
You find the rest of the story here: https://www.audioreviews.org/unique-melody-3dt-1/
Equipment used: Questyle QP1R; Sony NW-A55; MacBook Air & AudioQuest DragonFly Cobalt/Astell & Kern PEE51; Azla SednaEarfit Light silicone eartips (long stemmed).
TL;DR: The 3DT’s overall signature is “well timbred”, marginally warm with a bright tilt, wrapped into a gentle U with slightly recessed vocals, and an overall excellent articulation and technical capabilities. All three drivers are rather nimble. Overall presentation is cohesive.
The low end is rather speedy for a dynamic-driver iem. The two 7 mm drivers create a controlled, well-textured bass that does not reach down as deep as some wished. This results in a subtle rumble at the bottom. A thumpy mid-bass hump is avoided – something my ears would not appreciated anyway. There is enough punch for me, decay is rather quick for a dynamic driver. I’d call the low end well dosed, articulate, and it does not smear upwards into the midrange.
This articulation continues into the midrange and treble. Vocals are a bit recessed and neither thick or thin but somewhere in between. They are well defined and sculptured and NOT aggressive, although they receive some energy from a boosted upper midrange. This elevation introduces some brightness to the overall warm signature. A mod is offered in the next chapter to mitigate this.
Treble extension and resolution are very good. There is great definition and body at the top end. The highest piano and violin notes are hit with accuracy, and cymbals sound rock solid. There is no sibilance.
Soundstage is rather wide and not so deep (but deep enough), and may not be the tallest. But it makes for good spatial cues. Note definition is great, note weight is intermediate. Timbre is excellent and layering and separation are good. The image could have some more air, however.
If I had a personal criticism it would be the driver speed pushing the signature towards analytical – it could be a tad more engaging. The three drivers interact flawlessly without an transition creating a coherent image.
Unique Melody 3DT moddedThe 3DT’s 3-5 kHz area range may be a bit “spicy” for sensitive ears (but only a bit). Taping the nozzle screens off with surgical 3M micropore tape (don’t use Johnson & Johnson) removes some energy from this area without altering the bottom end. It also does not affect technicalities such as resolution and staging negatively.
The resulting frequency response is much more palatable to most ears and should have been implemented by the manufacturer. We have offered this technique for many earphone models and even dedicated an article to it. This mod is cheap, easy to do, and fully reversible.
Unique Melody 3DT ComparedI compare the Unique Melody 3DT to two single dynamic drivers, the $250 JVC HA-FDX1 and the $190 Moondrop KATO. The JVCs come sonically close to the 3DT but are a tad behind with a narrower stage, less clarity in the lower midrange, and not as tight a bass. The 3DT are slightly punchier with better spatial cues. These differences are, however, relatively small.
The Moondrop KATO are “fatter” and warmer sounding than the first two, which stems from their comparatively looser bass and a richer lower midrange. Vocals in the KATO sound fuller and more analog, but at the expense of note definition and midrange clarity. The 3DT sound more analytical and technical compared to the more relaxed and “casual” sounding KATO. An analogy would be a BMW M3 sportscar with a tight suspension vs. a Jeep Cherokee.
DisclaimerThe Unique Melody 3DT was kindly provided by the manufacturer through MusikTeck – and I thank them for that.
Get the Unique Melody 3DT from MusicTeck