Kefine Quatio Review

In the ever-expanding world of budget in-ear monitors, finding a model that delivers both technical performance and thoughtful design can feel like searching for a needle in a haystack. The Kefine Quatio enters this competitive space with an ambitious promise: a quad-driver hybrid IEM featuring tunable nozzles, premium materials, and balanced audiophile tuning at an accessible price point. With multiple drivers, interchangeable sound filters, and both single-ended and balanced connectivity included out of the box, the Quatio positions itself as more than just another affordable earphone; it aims to be a customizable listening tool for enthusiasts who want flexibility without paying flagship prices.

What You Get

• Quatio earphones
• Hard carrying case
• 2 extra nozzles
• 12 pairs of extra eartips (L/M/S)
• User manual
• Quality certificate
• Notice card for nozzles
• 2 Eartip storage cases

Look & Feel

Despite being a relatively inexpensive pair of IEMs, the Quaito is designed like a much more expensive product. Its housing is large and made from aviation aluminum that is polished and anodized after CNC processing. It makes for a dense piece that feels valuable for such a budget IEM. There’s nothing flashy about it; the housing is just a professionally made piece of machinery. The in-ear cavity expands broadly, but the shape of it forms well to your ear. The Quaito is easy to forget about when you’ve been listening to it for a certain amount of time. They have good isolation with a stable seal, never causing any significant fatigue.

Design

The Quatio features a hybrid quad-driver system combining two dynamic drivers (a 10 mm and an 8 mm unit) with two balanced armature drivers to deliver a broad and detailed sound profile across the 20 Hz–20 kHz range. They include a detachable 1.2 m cable with both 3.5 mm single-ended and 4.4 mm balanced plugs for versatile connectivity, and are built on a universal in-ear design with a sensitivity of ~107 dB and 32 Ohm impedance.

Soundstage

Inexpensive IEMs like the Quatio have proven to be solid options when it comes to soundstage and imaging. Even with the different nozzles that the Quatio provides, the positioning and separation of instruments is consistently engaging. Everything has a static appearance with the Quatio, like the instruments are nailed down to a space. This makes it sound linear, but not flat. If you use the gold nozzles, the Quatio is given a good amount of height, but the display of the soundstage always feels like true stereo. The left and right channels span widely while locking down pan positions in a way that accurately portrays the spatial imaging and layered arrangements of each track. Nothing is holographic or floaty, but the Quatio compels with its concise and uncompromised display of the stereo field.

Low End

Depending on the nozzles, the Quatio can be either very full and textured or lean and neutral. If you want the warmest timbre possible, attach the black nozzles. These will give the bass a lot of body and ressonance while still being smooth and detailed. It’s a bass that blooms outward and has a long decay. With the silver and gold nozzles, the decay shortens, providing more space for the bass, but with less weight. The gold nozzles have the best in-between for this low-end, as the bass still has form to it with detailed notes that provide some depth. The silver nozzle flattens the bass for its most neutral tone.

Mids

When switching between the three nozzles to assess the midrange, nothing beats the gold ones in my opinion. The silver nozzle provided good balance, and the black had good low-mid extension, but the gold nozzle brought everything forward with great transparency. Instruments have great finesse, responding to transients with quickness and velocity. Notes are individualized and resolve in the mix with excellent clarity. Clean electric guitars sound full and defined, while vocals are balanced and realistic. Voices don’t jump out at you, but there’s enough expressive detail here to make them stand out in the sound signature.

Highs

Neither one of the attachable nozzles features an energized treble. The closest you get to brightness is with the silver nozzle, and even that is quite tame. I spent the most time with the gold nozzle, which gave me the cleanest highs out of the three. They felt the most natural compared to the slightly raised silver and the dulled black nozzle. Even then, the gold nozzles’ treble isn’t very exciting. High-frequency sound elements tick and shimmer, but they never ring out or sparkle in any significant way. You do have an extended height, though, compared to the other nozzles. The silver has a clear treble that is very flat and linear, and the black nozzle’s highs just seem thin.

Summary

The Kefine Quatio proves that thoughtful engineering and sonic versatility are no longer exclusive to high-end in-ear monitors. Its quad-driver hybrid configuration, interchangeable nozzles, and robust aluminum build give it a sense of refinement rarely seen at its price point. Sonically, it favors clarity, balance, and control over exaggerated tuning, making it a strong option for listeners who value precision and adaptability over sheer flashiness. While its treble presentation won’t satisfy those craving sparkle or aggressive brightness, its cohesive tuning and spatial accuracy make it an excellent daily driver for a wide range of genres and listening styles. For audiophiles seeking an affordable hybrid IEM with genuine tuning options and a premium feel, the Quatio stands out as one of the more compelling values in the budget audiophile category today.

The Kefine Quatio is available at Audio46.