essonio ES-C19

The Essonio ES-C19 is a wired IEM with killer sound, 5 Knowles BA drivers, and a 4.4mm balanced cable. Sound quality is a standout at the 88th percentile, but the mic and connectivity are rough. Worth it only if you're a musician or serious listener with a good DAC.

The sound is the whole story here. Five Knowles balanced armature drivers, three genuine and two custom, deliver the kind of clinical vocal clarity that makes mixing sessions easier. The 4.4mm balanced cable with 8-strand, 192-core silver-plated copper helps with channel separation and a wider soundstage, and the passive noise isolation is solid for stage use. But the build quality sits at the 34th percentile, which is disappointing for something marketed as a professional tool. The comfort is strong at 72nd percentile, so long sessions shouldn't be a problem. Battery is a non-issue since it's wired, but the 45th percentile score reflects that it's not a wireless product at all.

Stacked against the Technics EAH-AZ100, Sony WF-1000XM6, and Apple AirPods Pro 3rd Generation, the ES-C19 wins on pure sound quality but loses everywhere else. Those wireless buds have ANC, mics that work, and connectivity scores that don't embarrass themselves. The Soundcore P31i and EarFun Air Pro 4+ are budget wireless options that beat the ES-C19 on convenience and mic quality, but they can't touch the wired IEM's driver count or balanced output. If you need one device for everything, get the Sony or Apple. If you need a dedicated monitoring tool, the ES-C19 makes more sense.

There's no price listed, which makes value tough to judge. But based on the specs and the sound score, this is a niche product for people who already own a good DAC or DAP and want a wired IEM for mixing or stage monitoring. If you're expecting AirPods Pro 3rd Generation convenience, you're looking at the wrong product. The included adapters and leather case add some real-world value, but the weak build quality and useless mic mean you're paying for sound and sound alone.

The Essonio ES-C19 is a wired IEM aimed squarely at musicians and audio nerds who want reference-grade sound without wireless compromises. Five balanced armature drivers, a 4.4mm balanced cable, and a hand-painted 3D-printed shell make it clear this thing is built for critical listening, not casual Spotify scrolling. The 5Hz-50kHz range is absurdly wide, and the 23Ω impedance means it'll play nice with most portable DACs and DAPs. Just don't expect to take a call on it.

Our database puts the sound quality at the 88th percentile, which is a standout for wired IEMs in this category. But the connectivity score is rough, 13th percentile, and the mic is even worse at 12th. That's the trade-off. You're getting a studio tool, not an all-rounder.

Skip this if you need wireless, ANC, or a usable microphone. The connectivity score is 13th percentile and the mic is 12th, so anyone who takes calls or wants to move around freely should look at the Sony WF-1000XM6 or Apple AirPods Pro 3rd Generation instead. Also skip it if you're rough on gear, the build quality is a weak spot.

Buy this if you're a musician, audio engineer, or hardcore audiophile who wants a wired IEM with a balanced connection and reference tuning. The sound is genuinely impressive, and the hand-painted shells are a nice touch. Skip it if you need a mic, wireless, or anything resembling everyday convenience.