KZ EDX Ultra Earphones Review – Budget-Friendy Yet Very Capable IEMs for Bass Lovers

First Impressions

The unboxing experience of the KZ EDX Ultra is nothing special. These IEMs came in simple packaging, which is expected at this price point.

Apart from the earphones with a pair of pre-installed ear tips, the box also houses the detachable cable and two extra pairs of silicone ear tips.

The EDX Ultra looks phenomenal out of the box, as it sports a resin shell with a circle aluminum faceplate similar to the EDX Pro. These IEMs look stunning and I like how the brand implemented this bold look for the EDX Ultra and Pro version.

Build Quality

The build quality of the KZ EDX Ultra is good enough for its price. 

The resin shell seems robust, and the IEMs feel durable, reducing my worry of accidentally breaking them.

The included accessories, such as the silicone ear tips, are of average quality but I can’t really complain given how much these IEMs cost.

On the other hand, the included silver-plated detachable cable is awesome. I like how these types of cables are beginning to be more common with budget IEMs.

Fit and Comfort

The KZ EDX Ultra features a familiar shape and comes in a standard size. The form and shape of these IEMs make them a good fit for average ear sizes.

Since the shell is made of resin with an aluminum faceplate, the EDX Ultra has little to no weight, making them comfortable to wear.

The included silicone ear tips were also comfortable enough and can give a good amount of noise isolation to prevent sound leaks.

Sound Quality

When it comes to sound quality, one particular thing that I immediately noticed with the KZ EDX Ultra is its warm sound signature. I thought it was quite reminiscent of my QKZ X HBB. 

Since the QKZ x HBB is one of my favorites, I immediately fell in love with the sound of the EDX Ultra. 

I’ve tried the base EDX model and I can say that I prefer the sound performance of the EDX Ultra as it’s noticeably better in terms of tuning and tonal balance. I’ve yet to try the Pro version to see how it does in comparison to the other EDX models.

These IEMs are also enjoyable to use, and I like the energetic sound it produces when listening to pop music tracks.

Bass

The bass on the KZ EDX Ultra packs a punch, making it stand out in a mix. Although it’s elevated, it didn’t seem overpowering.

The punchy bass response contributes significantly to how lively and energetic these IEMs sound.

Mids

Since the KZ EDX Ultra has a V-shaped sound signature, its mids are recessed but still present in the mix. 

It still has a good amount of body to them and the vocals were presented with good quality, although the recession is slightly noticeable.

I also observed that these IEMs suffer from a mid-bass bleed in the low mid ranges.

Overall the EDX Ultra can still present a clean and warm tone to the mids, which I am satisfied with considering its price.

Treble

The KZ EDX Ultra’s treble is brighter when compared to IEMs with a similar tuning. This allows the treble to be more present in the mix, which in turn makes it sound a whole lot clearer.

There were times when the treble sounded thin, but it’s situational and mostly present on poorly mastered tracks.

Test Tracks

To get a proper understanding of how these IEMs sound, I’ve tested them with different genres of music, and here are my findings.

• Metal/ Rock – When listening to some heavy tracks compared to other genres, I’ve noticed that the KZ EDX Ultra reacted differently. The lows sound balanced, and the mids are more upfront in a mix making the vocals and instruments more present. Tracks used: Cherub Rock (Smashing Pumpkins), Rest In Peace (Extreme), Enter Sandman (Metallica)
• K-Pop – The KZ EDX Ultra’s lively sound performed well when paired with some K-Pop songs, as this genre tends to have an overall lively, fun, and entertaining sound. The bass performed well in presenting the punchy kicks in the test tracks. The sound imaging and layering were present in the vocals, and micro-details can be observed. Tracks used: Hype Boy (NewJeans), OMG (NewJeans), Russian Roulette (Red Velvet)
• Hip-hop – The KZ EDX Ultra was able to catch up with the busy and fast-paced characteristic of the tracks that I’ve used. The bass was rumbly and punchy, and when you combine that with the bite of the treble, you get a vivacious and very forward sound presentation. Tracks used: After Party (Dan Toliver), Goosebumps (Travis Scott)
• Indie – I’ve picked various tracks with a wide-spacey sound to test out the sound imaging and sound-staging capabilities of the KZ EDX Ultra. These IEMs produced an immersive sound stage, and the detail retrieval also worked wonders. Tracks used: Over the Moon (The Marias), Space Song (Beach House), Wings (So Yoon and Phum Viphurit)
• R&B/Soul – When testing these IEMs, the R&B/Soul genre made me realize how versatile they are. The KZ EDX Ultra smoothly presented the vocals on the test tracks. The instruments sounded natural and organic, and the low end was present. Tracks used: Melting (Kali Uchis), Get You (Daniel Ceasar), Telepatia (Kali Uchis)

After testing the KZ EDX Ultra, I’ve discovered that they’re versatile and can work well with any genre you throw at them.

Conclusion

The KZ EDX Ultra is one versatile pair of IEMs. It’s easy to love and has many features that would make you appreciate it.

I love how it can present a warm sound that’s great for chilling out while still able to produce a lively and energetic sound with more catchy tracks.

The KZ EDX Ultra can cater to a broad palette of users. Whether you’re a bass head or someone leaning towards a more relaxed sound, you’d surely love how these IEMs sound.

This post was last updated on 2025-05-16 / Some images from Amazon Product API & some links may be affiliate links which may earn us a commission from purchases.