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The midrange is simply a too edgy and lean. When turning the volume up to reach satisfaction in terms of vocals body, all I get is bleeding eardrums. It is like the torture of Sisyphus as the desired result is never achieved. At low to moderate volumes, the midrange is fine, though. A nice addition to a well saturated market where everything sounds more or less the same, the Leá can be rightfully considered as your first reference sounding earphone.
Impedance - Indicates how much power is required for the driver. The higher the impedance, the more power is required to get the maximum quality and volume of sounds out of the driver. Electrical resistance to the flow of current in an AC circuit. The higher the impedance of the headphone, for instance, the less current will flow through it. Testing was done similar to all other IEMs, such as the Tripowin Olina itself. However, I chose to omit the test with the artificial pinna in place since fit was quite subjective and I wanted to keep this short. Seen above is the measured frequency response for both channels of the Tripowin Leá, which can be found and played around with here if interested. I would classify this sound signature as fairly balanced indeed, if not with a mellow V-shape depending on your preferences. There's around a 7 dB SPL hike in the bass region compared to the lowest point in the mids at 600 Hz, and even here it peaks in the lower bass with good extension down to 20 Hz. That ~0.5 dB drop in the sub-bass will not be felt much for a variety of reasons, the biggest of which is that this is a well-tuned set, but with mediocre technical performance. In this case, the bass doesn't hit as hard as you might think, and the dynamic range isn't much to boast about either. Leading edges in snares especially suffer, although micro-dynamics within that range are quite competent. Instrument separation could also be better, and the forward vocals primarily make this a set for bass guitars and vocals rather than string instruments and classical music.Boxy - Having resonances as if the music were enclosed in a box. Sometimes an emphasis around 250 to 500 Hz. Often called cardboard box sounding, like boxes used as drums. The soundstage is decently wide and spacious with a pretty much accurate imaging and it can convincingly reproduce the ambience and the scale of the music. Definition (or resolution) - The ability of a component to reveal the subtle information that is fundamental to high fidelity sound.
This is using a similar or perhaps the same driver as the popular T3 plus. Both IEMs are quite likable despite the shortcomings if any.The OLA are tuned to head-related transfer function (HRTF) curve, which boosts the 2 kHz to 5 kHz regions. The OLA are better technically, with superior micro-details, imaging, instrument separation, and clarity. Midrange - The midrange is clean but relaxed, really well done especially in the upper midrange. The vocals of male and female are more natural than artificial. Also the upper midrange can be shouty for some. Presence Range - The presence range between 4kHz and 6kHz is responsible for the clarity and definition of voices and instruments. Increasing this range can make the music seem closer to the listener. Reducing the 5kHz content makes the sound more distant and transparent.