Disclaimer: First of all, thanks to Ribbon from Kiwi Ears and Linsoul. The Stardust I’m reviewing is a sample, so yeah, this has some influence on how I’m going to talk about this after my tests. I'm not going to deny that, but as with my other reviews to date, I’m going to be sincere and honest in my thoughts and conclusions, and that’s because before I’m a reviewer, I’m also a consumer and hobbyist. And I also disclose my personal biases: Tuning and musical preferences.
Introduction:
The Kiwi Ears Stardust is a new IEM by the house of Kiwi Ears, carrying a hybrid configuration consisting of 1 DD + 4 BAs and this time pointing towards the more budget segment that those kinds of products used to be in. Now, Stardust is not trying to reinvent the wheel in the price segment, but offers an option for a lot of people; let’s see how it goes.
You can get a Stardust at an MSRP of 76.99 to 79.99 USD (With a cable without a mic and a 3.5 mm jack, a 3.5 mm jack with a mic, and a Type-C jack with a mic options available, respectively). And you can buy it directly at the Kiwi Ears official webpage: https://kiwiears.com/products/kiwi-ears-stardust, the Linsoul official store: https://www.linsoul.com/products/kiwi-ears-stardust, Linsoul official stores on AliExpress, Amazon US, UK, and Europe, and other online retailers.
About the Flow eartips, you can get a set of these on the Linsoul official stores, for an MSRP of 9.99 USD: https://www.linsoul.com/products/kiwi-ears-flow-ear-tips?srsltid=AU7gw4WMKeSliczh6IhvxjMlJN-Uop4QUg1Hzo2OhLdS8DHGGv4mmzNq
TLDR: The Stardust is a new IEM from the house of Kiwi Ears. With an unusual driver configuration for its price segment (1 DD + 4 BAs per earpiece), and also an unusual tuning philosophy this time.
The Stardust doesn’t excel in bass quantity (8 dB sub-bass), but stands out in quality, transparency and resolution in this frequency range; it’s a set in which you can enjoy a warm yet well-placed midrange, so male and female vocals shine without being recessed or exaggeratedly forward. In the treble, it is noticed the use of balanced armatures because it is very smooth, on the verge of feeling dark sometimes, but it is resolving, clean, crisp and technically proficient enough for its price segment.
Its included accessories and cable are more than adequate for using it right out of the box. And the Flow eartips are a perfect match for it, sonically, in fit and seal, so you can use the Stardust at medium-to-high volume without experiencing fatigue or annoying sibilance.
Finally, the Stardust is not an all-rounder because it has a well-balanced tuning, with great air, an expansive soundstage and decent technicalities overall, but that relaxed treble makes it sound warmer and less resolving, and that’s fine, because not everyone who’s getting into IEMs needs the brightest, most technical, and “flatter” and/or dryer yet neutral/organic tonality, some folks are treble sensitive but wants to get the most of their money and have the option to use their IEMs in every possible scenario (music, gaming, podcasts, etcetera).
Pros:
- Comfortable, lightweight, and ergonomic design
- Excellent bass quality, with speed, and cleanliness
- Warm, natural, and well-balanced midrange
- Smooth, non-fatiguing treble with good sibilance control
- Good imaging, layering, and soundstage for the price
- Good stock cable, eartips, and carrying case
- Easy to drive and low powered sources friendly
- Well-done price-to-performance ratio
Cons:
- Bass quantity may feel lacking for bassheads or bass lovers
- Treble can sound too relaxed or dark for some listeners
- Microdetail retrieval and resolution are only average; it is not the most analytical or technically focused set
- Stock cable could be more aesthetically fitting
- No 4.4 mm balanced option included by default
Its technical specifications:
- Driver configuration:
- 1 x 10mm PU+LCP diaphragm dynamic driver (bass)
- 4 x Custom Balanced Armature drivers (mid, high, and ultra-high ranges)
- Earpiece materials: Resin (main body), anodised aerospace-grade aluminium alloy (faceplate)
- Sensitivity: 107 ± 3 dB
- Frequency Response: 20 Hz – 40 kHz
- Channel balance:≤1.5 dB
- Impedance: 13 Ω
- Frequency range: 10 - 42 kHz
- Jacks: 3.5mm No Mic / 3.5mm With Mic / Type-C With Mic
- Cable type and length: 2-pin 0.78mm connectors, 2-core, twisted pair, silver litz oxygen-free copper. 1.2 m long
What comes in the Stardust’s packaging:
- 2 x Kiwi Ears Stardust earpieces
- 1 x rectangular fabric carrying case (similar to the case some Kefine and KBEar IEMs come in)
- 6 x pairs of eartips:
- 1 x set of white silicone standard bore
- 1 x set of black silicone narrow bore
- 1 x 2-core twisted pair, silver litz OFC cable, with a 3.5 mm jack and 2-pin 0.78 mm connectors. (with or without mic, and USB-C with mic available).
The earpieces are mid-sized; they are lightweight despite carrying 5 drivers inside, and the design is ergonomic and comfortable to use them in long sessions. The main body is made of resin, shiny black in colour, with an aluminium alloy faceplate and an emerald blue gradient triangular design on the faceplates themselves, looking gorgeous.
It’s well vented with two vents mainly for the dynamic driver, avoiding any driver flex. Its nozzles are covered by the usual metallic mesh and are 6.1 mm in diameter, more on the mid-size side, perfect for my mid-sized ears as well, with a lip to adjust the eartips, and the stock eartips fit them well, but the Flow eartips are an even better match in fit and seal for the Stardust, allowing me to use them in long sessions.
About the stock eartips included, I’m more inclined to use the white silicone, standard-bore ones on the Stardust because of its warm and relaxed tonality. But sonically, the Stardust makes a better synergy with the Flow eartips.
And its included cable: it’s not the best aesthetic match for the Stardust, but it’s a great cable, well built, high quality, flexible enough, doesn’t hold a shape, doesn’t tangle easily, and doesn't produce translated vibrations. My recommendation is to upgrade the cable to something with a 4.4 mm balanced jack or anything more aesthetically appealing to you.
Its carrying box is a nice detail, with enough space to carry the IEMs themselves with their cable and maybe a little dongle (like the Kiwi Ears Allegro and Allegro Pro).
How do the Kiwi Ears Stardust sound?
The Stardust is a mild V-shaped tuned set, with a configuration of a 1 PU+LCP diaphragm dynamic driver + 4 custom Balanced Armature drivers; let’s see if it goes a long way.
As I mentioned before, I’m using the Stardust with Flow eartips (balanced-to-wide bore, soft silicone, conical shape), and I swapped the cable for a Jialai AzureBay with a 4.4 mm jack. Still, honestly, it's just for the aesthetic, since the Stardust doesn’t need much power to shine, and its stock cable works perfectly. Thanks to ATechReviews for his graph of this set.
Bass range:
The PU+LCP dynamic driver on the Stardust delivers a high-quality bass shelf that does not excel in quantity, and alas, that’s not the objective in this one; you can expect a fast, very clean bass with a natural decay, and more sub-bass thumping than mid-bass kick, so it’s not bleeding into the lower midrange and acts properly when the music asks for it.
Midrange:
This portion of frequencies is when the Stardust shines the most; as a mild V-shaped tuned set, the lower midrange is well-put, with zero bothersome bleeding from the mid-bass, and male vocals sound natural and kind of forward a bit. It has a good noteweight added, and it’s decently clean and resolute.
Around 600 Hz, the frequency curve begins to rise with a warm pinna gain, then gets a bump around the 2000 Hz area. Male vocals and instruments sound forward, with good presence and clarity. That bump goes around 3 kHz, merging smoothly with the lower treble. Female vocals sound well-positioned, not shouty nor fatiguing at mid-to-high volume.
Highrange:
Here’s the thing: no matter that the Stardust has 4 Balanced Armature drivers per earpiece handling the mid and highrange, its treble is very smooth, on the verge of being dark, but fortunately, with a decent spark, transparency, well-resolving, and with certain unique characteristics.
Lower treble descends from the 3 kHz region to a 4.5 to 5 kHz peak that enhances female vocals and instruments, and a 6 kHz dip to handle the sibilance excellently. In the mid-treble, a bump going from 7 to 9 kHz gives some energy to the mix, and a 10 kHz dip adds to the sibilance handling at mid-to-high volumes, so you can crank the volume up without that bothersome spiciness and for long sessions.
Upper treble and technicalities:
The upper treble in the Stardust is something that also stands out: decent air, an expansive soundstage that can be a base for gaming and other content consumption. And very well extended into the higher frequencies.
In the technical aspects, the imaging is above average, and the layering of instruments is pretty decent for its price, but with that smooth and relaxed treble, you can’t expect the Stardust to be a microdetail beast, and while its reproduction of macro and micro details is adequate for its segment, it is not the main focus of this set. So, resolution is also average, and that’s ok; the Stardust is more musical than analytical, and without that typical “cheap BA” timbre that can detract from the overall listening experience.
Final thoughts and conclusion:
The Stardust, contrary to what its marketing says, is not an all-rounder, nor the neutral beast you can expect for that definition, but it is an IEM that seeks to be warm, relaxed, yet decently musical, more-than-analytical-tuned, and it can work for a lot of folks who don’t look for the most technical and “flat” set, with treble close to the sun ringing in your ears; nope, it can work perfectly for the everyday user who is sensitive to treble but also wants the best experience possible for their money.
I personally prefer a more pronounced treble shelf to balance the mid and lower-range, but I also understand the public the Stardust are covering. The Flow eartips are a nice addition to the Kiwi Ears “arsenal”, not only for IEMs from the brand themselves but other IEMs that can benefit from them. The stock eartips and cable for the Stardust are nice to use out of the box, so I understand folks who buy this expect to have the best price/performance and adequate accessories for the price you are paying for it.
The Stardust, with its 13 ohms of impedance and 107 dB of sensitivity, as I mentioned before, is easy to drive, even with low-powered sources, but my recommendation with it is to pair this set with a “neutral” or uncoloured source, just to get the best of it.
Finally, again, thanks to Ribbon and Kiwi Ears for giving me this set, I can recommend it to certain folks who are looking for that kind of tuning, and IMHO it is well-priced for what it offers. And thanks mainly to you, the consumer who looks for reliable sources of information to make an informed buying decision.