Yinyoo Hybrid Earphones KZ ZST Balanced Armature+Dynamic Dual Driver Stereo in Ear Headphone HiFi Bass Headset in-Ear Earphones (No mic, Black)
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AI Verdict
These are wired hybrid driver in-ear monitors with a 3.5mm L plug, offering a v-shaped sound profile for budget-conscious audiophiles and gamers.
The 2.08-ounce weight and over-ear design with ear hooks contribute to a stable and comfortable fit for many, even during extended use. However, the shallow insertion and potentially flimsy included tips mean optimal seal and comfort might require aftermarket ear tips.
If you struggle with earbud fit, look for models that explicitly mention a wider variety of included ear tip materials or sizes, like memory foam, for better seal and comfort.
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Pros
- Hybrid driver design (dynamic + balanced armature) delivers clear, detailed audio with impactful bass and bright treble.
- Lightweight construction and over-ear wearing style provide comfortable, stable fit for extended use.
- Detachable, high-purity OFC cable ensures stable, zero-latency audio transmission.
- V-shaped sound signature with elevated bass and bright treble is suitable for metal, rock, and FPS games.
- Impressively low distortion, especially in the bass region, with most frequencies under 1%.
- Includes S/M/L silicone ear tips for fit customization.
Cons
- Midrange frequencies can sound slightly scooped, reducing body in some instruments.
- Included silicone ear tips are sometimes described as flimsy and having an unpleasant odor.
- High-frequency music at loud volumes can sound crunchy or tingy.
- Significant sound bleed at high volumes means nearby individuals can hear your audio.
- Basic plastic build quality with potentially poorly glued metal screens on the bores.
- The product explicitly states 'No mic', making the 'in-line mic' and 'remote buttons' mentioned in feature highlights irrelevant for this model.
Dimension Scores
The hybrid driver design delivers a clear, detailed, v-shaped sound with impactful bass and bright treble, which is above average for its price point.
While listed with 'Sound Isolation', user experience suggests it's present but not exceptional, and can be improved with different ear tips.
The lightweight, 2.08-ounce design and over-ear hooks provide a stable and comfortable fit for many, but the included tips may not offer the best seal for all users.
These are wired earphones with a 3.5mm L plug, so they do not have a battery and require a wired connection to a power source.
Best For
- Gamers needing clear directional audio and impactful bass for FPS titles.
- Music listeners who prefer a v-shaped sound signature with emphasized bass and treble.
- Individuals seeking wired in-ear monitors for studio monitoring or band practice.
- Users requiring a lightweight, over-ear earphone that stays secure during movement.
Not Recommended For
- Users who require a built-in microphone for calls or voice chat.
- Audiophiles prioritizing a neutral or flat frequency response.
- Individuals needing maximum sound isolation in noisy environments.
- Those who listen to music at very high volumes in quiet shared spaces.
Watch Out For
- The product title and specifications clearly state 'No mic', but the feature highlights confusingly mention an 'in-line mic' and 'remote buttons', which are not present on this specific model.
- The included silicone ear tips are often reported as flimsy and may have a chemical smell, leading many users to replace them for better comfort and seal.
- Listening to certain high-frequency music at loud volumes can result in a 'crunchy and tingy' sound quality.
- Sound leakage is noticeable at higher volumes, making them unsuitable for quiet office environments or public transport if you listen loudly.
- The plastic construction, while lightweight, feels basic, and some users noted issues like poorly glued metal screens on the bores.
Full Specifications
| UPC | 611517423161 |
| ASIN | B06WVFLYZF |
| Brand | YINYOO |
| Color | dark-black |
| Style | without mic |
| Material | Plastic |
| Impedance | 18 Ohms |
| Model Name | KZ ZST |
| Form Factor | In Ear |
| Item Weight | 2.08 ounces |
| Control Type | Media Control |
| Manufacturer | Yinyoo |
| Cable Feature | Detachable |
| Ear Placement | In Ear |
| Noise Control | Sound Isolation |
| Control Method | Touch |
| Earpiece Shape | Rounded tip |
| Headphones Jack | 3.5 mm Jack |
| Number of Items | 1 |
| Special Feature | Lightweight, Noise Cancellation, Sports & Exercise |
| Audio Driver Type | Hybrid Driver |
| Item model number | zst |
| Compatible Devices | Devices with a 3.5 mm jack |
| Frequency Response | 20000 Hz |
| Hardware Interface | 3.5mm Audio |
| Product Dimensions | 3.54 x 2.76 x 1.18 inches |
| Included Components | Cable, Eartip |
| Input Device Interface | Audio jack |
| Water Resistance Level | Not Water Resistant |
| Age Range (Description) | Adult |
| Connectivity Technology | Wired |
| Specific Uses For Product | listen to music |
| Recommended Uses For Product | Exercising |
| Supports Bluetooth Technology | No |
| Is Discontinued By Manufacturer | No |
| Wireless Communication Technology | Wi-Fi |
What Buyers Say
Many users are genuinely surprised by the sound quality these wired hybrid earphones deliver for their cost, often comparing them favorably to more expensive options. The v-shaped sound profile, with its punchy bass and clear highs, is a recurring highlight, making them a popular choice for music and gaming. However, the basic plastic build and the need to potentially swap out the included ear tips for better comfort or seal are common points of discussion. The lack of a microphone on this specific model, despite confusing product descriptions, is a key detail to note.
“Dude, for twenty bucks, these things sound insane! The bass kicks and everything's so clear, but seriously, ditch those stock tips right away, they're garbage and smell weird.”
Common Praise
- Sound clarity and detail are exceptional for the price.
- Bass response has satisfying weight and impact without muddiness.
- Treble is bright and sparkly but avoids harshness for most listeners.
- Comfortable and secure fit due to lightweight design and over-ear hooks.
- Detachable cable is a practical feature for longevity and customization.
- Impressive instrument separation, especially in complex musical passages.
Common Complaints
- Midrange can sound somewhat recessed or scooped.
- Included ear tips are often described as flimsy, uncomfortable, or having a chemical smell.
- Sound can become 'crunchy and tingy' at high volumes with specific high-frequency content.
- Significant sound leakage occurs at higher listening volumes.
- Basic plastic construction feels cheap and some components, like bore screens, may be poorly secured.
- The absence of a microphone on this model, despite conflicting product information, is a drawback for those expecting call functionality.
Ownership Tips
- After a few weeks, many users find replacing the stock silicone ear tips with aftermarket options (like memory foam) significantly improves comfort, seal, and even bass response.
- The detachable cable, while a pro, can sometimes feel a bit cheap, and some owners upgrade it for perceived durability or aesthetics.
- The 'v-shaped' sound signature becomes more apparent over time; if you prefer a balanced sound, you might find yourself reaching for EQ settings.
- The plastic shells, while light, can show scratches easily if not stored carefully.
- Despite the sound bleed at high volumes, the sound isolation is generally sufficient for casual listening in moderately noisy environments.
Frequently Asked Questions
Does this model include a microphone for calls?
No, this specific model is explicitly listed as 'No mic, Black' in its title and specifications. Any mention of a microphone in the feature highlights does not apply to this version.
What kind of sound quality can I expect?
These earphones offer a v-shaped sound signature, meaning the bass and treble are emphasized. Users report clear, detailed audio with satisfying bass impact and sparkly highs, though the mids can be slightly recessed.
Are these comfortable for long listening sessions?
Many users find the lightweight design and over-ear fit comfortable for hours. The included S/M/L silicone tips allow for some customization, but some users opt for aftermarket tips for improved comfort and seal.
Is the cable detachable and replaceable?
Yes, the earphones feature a detachable, high-purity OFC cable. This allows for easy replacement if damaged or for upgrading to a different cable.
Are these suitable for gaming?
Yes, the KZ ZSTs are often recommended for gaming, particularly FPS games, due to their clear sound, detailed imaging, and powerful bass.
Buying Guide
When looking at in-ear monitors like these, you're essentially choosing a tiny speaker system that sits directly in your ear canal. You need to think about how they fit, how they sound, and if they'll hold up. 'Wired' means no battery worries, but also no wireless freedom. 'Hybrid driver' means they're trying to get the best of two different speaker types. Pay attention to the sound profile – 'v-shaped' means bass and treble get a boost, which is fun for some music but not for all. Comfort is huge, especially for in-ear, so ear tip quality matters a lot.
Hybrid Driver (Dynamic + Balanced Armature)
This means the earphone uses two different types of tiny speakers. The dynamic driver is like a traditional speaker, usually handling the bass with more 'oomph'. The balanced armature driver is smaller and more precise, often used for clearer mid-range and treble details. Combining them aims to give you a fuller, more detailed sound across the frequency spectrum, like having a subwoofer and a tweeter in a tiny package.
Impedance: 18ohm
Impedance is how much resistance the earphone offers to the electrical signal. At 18 ohms, these are considered low impedance. This means they don't need a lot of power to get loud, so your smartphone, laptop, or portable music player can drive them easily without needing a separate amplifier. Think of it like a car with a small engine that's still quick off the line.
Frequency Response: 20Hz-20000Hz
This range represents the lowest and highest sounds the earphones can reproduce. 20Hz is a very deep bass note, and 20,000Hz (or 20kHz) is a very high treble note. This range covers the full spectrum of human hearing, so theoretically, you won't miss any part of the music. It's a standard range for most headphones, indicating they can reproduce the full audible spectrum.
Sound Isolation
This refers to the earphone's ability to block out external noise passively, without electronic noise cancellation. It relies on the physical seal the earbud creates in your ear canal. Better sound isolation means less distraction from your surroundings and a clearer listening experience, especially in noisy environments. It's like putting earplugs in, but with music playing through them.
Alternatives
If you need a microphone for calls or voice chat, look for wired in-ear monitors explicitly stating 'with mic' in their specifications. For a more neutral sound profile, search for earphones with a flatter frequency response, often described as 'reference' or 'studio' tuning.
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