Kiwi Ears Quartet

I've been carrying the Kiwi Ears Quartet for about a month now. I never expected such sound quality at this price. The tuning switches work perfectly, allowing you to have four different fine-tuned sound characteristics. The bass is beautifully expressed with dual isobaric dynamic drivers.
My Head-Fi review >> https://www.head-fi.org/showcase/kiwi-ears-quartet.26511/reviews
My Reddit review >> https://www.reddit.com/r/iems/comments/1n994wh/basshead_kiwi_ears_quartet_iem_monitor_2xdd_2xba/
Instagram review video >> https://www.instagram.com/reel/DOl3zsfDa4J/?igsh=NWl3M3E0MTcwanZz

Alright, so I’ve been daily driving the Kiwiears Quartet for a while now, and I’ve gotta say—these things are surprisingly good. My music taste is all over the place, so any IEM I use has to handle everything from Nordic folk and Tamil melodies to hip-hop, rock, trance, and cinematic scores. And somehow, the Quartet handles it all like a champ.

Bass – Tight, Punchy, and Clean
The bass is definitely tuned with fun in mind—it punches nicely without being too boomy. Tracks from XXXTentacion and Drake hit hard without drowning the vocals. Even when I play something bass-heavy like an Infected Mushroom trance mix, the bass stays controlled. It’s not overly boosted, just tight and satisfying.

Mids – Smooth and Full of Emotion
Here’s where the magic is. Vocals feel rich and alive. Whether I’m vibing to AR Rahman or Ilayaraja melodies, or losing myself in Santhosh Narayanan’s layered production, the Quartet delivers. The mids are warm and detailed—perfect for Tamil tracks where emotion lives in the vocals. And even in rock tracks like Linkin Park or Three Days Grace, guitars and drums sound full and not muddy.

Treble – Safe and Non-Fatiguing
The treble’s not trying to stab you in the ears, which I respect. It’s smooth, maybe slightly rolled off up top, but you still get enough detail. Joyner Lucas and Eminem’s quick-fire verses are easy to follow, and the shimmer in orchestral or ambient tracks doesn’t get lost—it just never turns harsh, which is ideal for long listening sessions.

Soundstage & Imaging – Intimate but Well-Placed
You don’t get a super wide “concert hall” kind of stage, but what’s there is nicely spaced out. When I listen to Heilung or Wardruna, the ritualistic drums and background effects feel immersive. Hans Zimmer’s soundtracks have a good sense of layering, and Ludwig Göransson’s more experimental stuff like Tenet also comes through really well.

How It Handles My Playlist:
Nordic Folk (Danheim, Wardruna, Heilung) – Deep drums and chanting sound powerful and immersive. Great layering and atmosphere.

Hip-Hop (Kendrick, Joyner Lucas, Drake, X, Eminem) – Vocals are crystal clear, bass is punchy, and nothing gets lost in busy mixes.

Tamil Melodies (AR Rahman, Ilayaraja, Anirudh, Santhosh Narayanan, Yuvan, Harris Jayaraj) – Absolute treat. Vocals shine, instruments sound lush and emotional.

Rock / Alt (Linkin Park, Three Days Grace) – Guitars and drums hit hard without sounding muddy. Chester’s screams? Spot on.

Trance / Psychedelic – Solid sub-bass and clean layering. Not super wide but still very immersive.

Movie Scores (Hans Zimmer, Ludwig Göransson) – Big, cinematic moments land with impact. Details are present, nothing sounds flat.

What I Liked:
✔️ Fun and engaging sound signature
✔️ Mids are beautiful, especially for vocals
✔️ No treble fatigue, good for long sessions
✔️ Handles all genres in my library without breaking a sweat
✔️ Super comfortable to wear

What Could Be Better:
❌ Soundstage is a bit intimate, not super wide
❌ Treble could use a touch more sparkle in some tracks (Based on the music I personally listen to)
❌ Not for hardcore detail freaks who want a microscope in their ears

Final Thoughts
For someone like me, who listens to everything from tribal chants and Tamil classics to modern rap and rock, the Kiwiears Quartet hits the sweet spot. It doesn’t try too hard to be analytical or overly colored—it just sounds good. Fun, emotional, balanced.

If you’re looking for a set that won’t ask you to change your playlist to suit the IEM, this one’s got your back. Easily one of the best all-rounders I’ve used in this price range.

Ein riesen Lieferpaket und ein herausragender Sound – ich bin absolut zufrieden und begeistert. Jedes Ohrhörer-Modell verfügt über einen kleinen EQ mit vier Anpassstufen. In dieser Preisklasse sind sie weit überlegen im Vergleich zu den Shure 215 und Sennheiser IE100 Pro.

Sie haben einen wahnsinnig guten Klang, der mit viel Druck auf die Ohren gedrückt wird.

Ich kann sie definitiv weiterempfehlen und werde es auch tun!

The Kiwi Quartet offers a surprisingly good listening experience for its price. The sound is warm and balanced, with well-defined bass, detailed mids, and smooth yet present highs. They are ideal for genres like jazz, pop, and acoustic music, where instruments and vocals feel natural and well-represented.

Comfort is another strong point, as their ergonomic fit allows for long listening sessions without fatigue. Additionally, the included cable is of good quality and helps reduce interference.

If you're looking for versatile IEMs with a pleasant and detailed sound profile, the Kiwi Quartet is an excellent choice in its price range. Highly recommended!

As soon as I got them, I was blown away by the sound and comfort. I own several IEMs ranging between 20-60 euros and as you might have guessed these are my most expensive pair, and I have to say - it shows. These are probably the best pair of IEMs I own now. As said previously - comfort on these are excellent, I can use them for hours without any fatigue. Sound just goes beyond anything that I heard previously and switches really do change the tuning. Because of these switches, I think that anyone can find a sound signature they like on these IEMs. Well done Kiwi Ears, my favorite pair was Cadenza previously, now Quartet is my new favorite.

I bought this together with the Aful Explorer. The Quartet has a little more bass but both hold their own.
The tuning switches really work. I own 20+ IEM’s ranging from 15,- to 435,- but the Quartet is a banger!
You like clean bass and balanced mids and highs? Buy the Quartet , set the switches to 0-0 (or 1-0 if you want extreme bass) and you are ready to go! Fancy a little less bass? Go for the Explorer.
Both are HIGHLY recommended!
If people say not impressed or switches not noticeable then they are full of it. Probably hobbyist listening to Spotify stating mp3 sounds the same as flac🤣
Not audiophiles like us!😉

Отличные наушники, удобство 100%

Hoy con los Kiwi Ears Quartet vemos los auriculares que para mi son los mejores para gaming y musica y que se pueden conseguir por menos de 100€. Tienen una configuración peculiar y un sonido muy oscuro pero unas performance que sobresale. Buen trabajo Kiwi Ears.

Si compras el cable selecciones: 3.5mm, 2 pin 0.78mm y color Violet

EUROPA
Kiwi Ears Quartet: https://www.linsoul.com/products/kiwi-ears-quartet?sca_ref=5138062.rjzxFoPGCD

I got to review these IEMs and posted the video on my YouTube channel @BandOnABudgetNZ
Only thing I didn't like or completely understand was the little switch toggles on the earphones, kinda pointless and/or unnoticeable. Aside from that I really like these earphones, they work great for my needs when playing bass guitar and drives in a live gig or rehearsal.
https://www.youtube.com/watch?v=MQkKel7qiyg

I owned previously some much cheaper KZ ZS10 Pro that sounded alright and were very comfortable to wear for several hours.

It took 40 days to receive them, not really an issue as this was a pre-order and I know about the delays we can expect from Linsoul.

Now that I have tried the Quartet, I can say that I am not really impressed by the sound. I did not find any improvement in sound quality so far. Maybe they need to be broken in. I think that the mids are less present and that it lacks something, not sure what. Also they are less comfortable to wear than my KZ, the fit in my ear is not great, I have to push them deep or they will pop out. I double checked that I used the correct side. Maybe that affects my impression of overall sound quality.

On the plus side the cable is nice and there is is a interesting choice of different ear plugs, they is a black set, a white set and a grey/red set. Not sure if these are any different besides the color.

Some more detailed instructions about assembly would have been great. There is no L/R marking on the IEMs and the cable separates into a white and red one. Is the red one for the Right side ? I had to guess.

They also look great, it is prettier to see the real thing than seeing it on the photos.

But, I don't know. I'm kind of disappointed, I guess I expected something different about the sound quality and comfort of use. I will continue to use them and see if I like them better over time.

Beautiful design, nice build quality except the cable looks standard. Sound quality is really nice, has balance tuning, smooth with slightly bass boost. more nice to have is tuning switch! 4 different sound signature. all ON switch is more favorite sound for me.
for more detail, pros, cons, etc please check my youtube channel, I will upload ASAP.

Here is my own review with original measurements from my 711 cuopler, hope you enjoy it !
https://youtu.be/yhKyURJUE5s

"The Kiwi Ears Quartet diverts from Kiwi Ears’ mature tuning for a more fun but still elegant-looking IEM that caters to the most popular genres. Its solid fit and well-rounded warm tuning makes it a solid set, but beware the coherency issues that leads to a metallic sounding upper mids to treble and the somewhat subpar technicalities for the price. Purple gang!"

This set is great for many reasons but I was mostly impressed with how it did in first-person shooter video games. The technical capabilities of the Quartet really enhanced the experience of my gaming sessions. Also the shell is gorgeous, highly recommend.

decir que estos Kiwi EARS QUARTET me han encantado, pero muchoooo… mucho!!
Puedes usarlo como monitores de estudio, con sub-bajo y énfasis en frecuencias por debajo de 350Hz.
Esto te proporcionará un poco más de cuerpo, textura y riqueza en los medios inferiores, pero con unos medios neutros.

Son perfectos también para baterías y bajistas que requieren bajos potentes e impactantes.

Pero, igualmente los amantes de escuchar una buena música que quieren unos bajos de calidad pero una tonalidad muy natural también se beneficiarán del equilibrio del diseño sonoro de este modelo QUARTET.

Así que si estás en alguno de estos grupos, te los recomienzo al 100%, yo estoy usándolos casi todo el tiempo que puedo llevar auriculares con cable. Y si ya tienes un amplificador o DAC AMP, les vas a sacar todo su jugo como a todos los auriculares con cable.

Decir una vez más que los auriculares con cable siguen siendo muy superiores a los auriculares bluetooth, aunque cada vez esa distancia se va a cortando, de momento unos auriculares IEM como estos sonarán mucho mejor que unos EarBuds bluetooth, por muy buenos que sean.

Y por decir alguna cosa a mejorar, que siempre la hay, quizá su escena sonora, no es muy amplia, les han dado algo de libertad de aire, para que la separación instrumental y la escena crezca, para que el sonido respire, pero quizá todavía esta es la parte que podría mejorar en este modelo QUARTET. Aún asi, estoy siendo muy detallista, porque para mi tienen un sonido increíble y divertido con sus graves potentes, peeero, ahí está ese detalle a pulir un poco todavía.

This is an incredible Earphone with great Bass, and what I love is how easy it is to drive it. It's a fantastic set around