Review of the Kiwi Ears Kadenza II: Entry-Level IEM Earphones

Today, we are reviewing the Kiwi Ears Kadenza II in-ear monitors – a model positioned as an audiophile-oriented solution. These IEMs follow a classic design philosophy: wired connectivity, a detachable cable, and a focus on sound quality rather than additional “smart” features.

TABLE OF CONTENTS:

Kiwi Ears Kadenza II Specifications

Impedance: 18 Ω
Sensitivity: 106 dB SPL/mW
Frequency response: 10 Hz – 29 kHz
Cable length: 1.2 m (detachable)
Connector types: 3.5 mm TRS jack for connection to a music player, 2-pin 0.78 mm for connection to headphones
Cable: single-crystal copper (SCC)

Positioning and Price

The Kiwi Ears Kadenza II are priced at around $50 on AliExpress, placing them in the budget segment of the headphone market, although not among the most affordable options available. Considering the relatively modest accessory package, these earphones appear to be positioned primarily as an entry point for aspiring audiophiles and an opportunity to experience Kiwi Ears’ new KARS 2.0 sound technology.

Package Contents

The Kiwi Ears Kadenza II package is fairly standard for IEM earphones: it includes a detachable cable with two 2-pin connectors and a set of ear tips. The package contains six pairs of ear tips in different sizes and levels of firmness, which is a welcome addition and increases the chances of finding a comfortable fit for different ear shapes.

The cable is relatively standard – a 3.5 mm to 2-pin design – but it is of good quality. It uses a braided single-crystal copper construction, looks durable, and has a clean, premium appearance. It does not feel like a low-cost accessory included merely to complete the package.

However, the package is not without its drawbacks. All ear tips are packed together in a single bag, so users will need to spend some time sorting them into pairs. It is a minor inconvenience, but not the most user-friendly approach.

A more significant issue is the lack of a 3.5 mm to USB Type-C adapter. With many modern smartphones no longer including a 3.5 mm headphone jack, this means that connecting the earphones to a phone may not be possible out of the box. For an audiophile-oriented product, this feels like a somewhat unusual omission. Users will need to purchase an adapter separately. I can recommend this tried-and-tested budget option, or this one – which is more expensive, but still relatively affordable.

Design and Materials

In terms of materials, the Kiwi Ears Kadenza II follows a fairly traditional approach. The main body of the earphones is made of plastic, while the included ear tips are silicone. There are no unusual design experiments here, but the build does not feel cheap or poorly executed.

At the same time, there is a design element that gives the earphones a more distinctive appearance – a titanium insert with an ornamental pattern on the outer side. It looks stylish and adds visual character, making the design feel more refined than a purely utilitarian plastic shell.

The build quality is solid: there is no noticeable play or creaking, the ear tips stay securely in place, and the cable connectors provide a reliable fit. Overall, the Kadenza II feel like a well-assembled and carefully designed product.

Ergonomics of the Kiwi Ears Kadenza II

In everyday use, the Kiwi Ears Kadenza II are comfortable. With the right choice of ear tips, they stay securely in place, do not create excessive pressure, and remain comfortable even during extended listening sessions. I was able to wear them for several hours, including both static activities such as watching videos and more active use like stretching or light exercise. The earphones maintained a stable fit throughout, and there was no need for frequent adjustments.

The cable is generally good, but it has some limitations: a standard 3.5 mm connector, no built-in microphone, and therefore reduced versatility. In modern usage scenarios, this means that the range of applications is somewhat narrower without additional accessories. However, the braided construction is a practical advantage – the cable does not tangle easily when carried in a pocket, which is a small but welcome detail.

Sound Quality of the Kiwi Ears Kadenza II

The Kiwi Ears Kadenza II use a dynamic driver with a PET diaphragm combined with KARS 2.0 (Kiwi Acoustic Resonance System) technology, and this approach is clearly reflected in their sound signature.

The PET diaphragm contributes to a natural and cohesive sound presentation. The bass is full-bodied and sufficiently deep, but it is not exaggerated – it does not overpower the rest of the frequency range and instead integrates naturally into the overall mix. The tuning provides good control, with no noticeable muddiness even in more complex and densely arranged tracks.

The high frequencies are handled carefully: they remain clear without becoming harsh or fatiguing. There is no excessive brightness or noticeable sibilance, which is a common issue in more affordable earphones. The low end feels rich and impactful, yet it avoids dominating the entire presentation. Thanks to the KARS 2.0 system, the bass remains controlled and blends naturally with the rest of the spectrum.

The midrange, including vocals, sounds balanced. Voices are neither recessed nor overly forward, while instruments are reproduced naturally without unwanted artifacts such as hiss, sharp peaks, or other distracting imperfections.

Overall, the result is a sound signature that can be described as versatile and comfortable. It does not attempt to impress through artificial emphasis or exaggerated effects, but instead delivers what users typically expect from well-tuned IEM earphones: a balanced, enjoyable, and refined listening experience.

Conclusion

The Kiwi Ears Kadenza II are an example of earphones that do not try to be something they are not. They deliver a balanced and enjoyable sound experience along with a simple but well-executed user experience.

The advantages include pleasant sound reproduction without harsh frequency peaks, a well-balanced tuning across the entire range, solid build quality, and a sufficient selection of ear tips in the package. Another benefit is the detachable cable with a 2-pin connection, which provides room for future upgrades. For example, the earphones can be converted into a wireless setup and equipped with a microphone by using a Bluetooth cable purchased separately (sold separately; for example, here’s an affordable yet high-quality option).

The main drawbacks, as mentioned earlier, are the lack of a USB Type-C adapter in the box, which limits out-of-the-box compatibility with many modern smartphones, as well as a few minor packaging details, such as the way the ear tips are presented.

These earphones are a good choice for users who are just starting their audiophile journey and are looking for a comfortable, balanced sound signature without aggressive emphasis at an affordable price. However, those who expect maximum versatility straight out of the box may find them somewhat limited. Overall, the Kiwi Ears Kadenza II are a solid entry-level option without unnecessary hype. They focus on the most important aspect of an IEM product: delivering enjoyable sound quality.

Design. materials 10
Package contents 9
Comfort of use 10
Sound 9
Price 10

Kiwi Ears Kadenza II Review: Entry-Level IEM Earphones with Impressive Sound Quality