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Audiophiles are nicely conscious of Questyle and what the corporate is able to. Its M15i and CMA18 DACs have been well-received by many. The brand new M18i cell DAC continues that streak.
With the M18i, you get a wired or Bluetooth DAC for cell connectivity and a succesful desktop DAC appropriate with Home windows, macOS, and Linux. Every thing you could make it work, together with a USB-C to USB-C cable and USB-A adapter, is included within the field.
The sound high quality is exemplary, thanks partly to some proprietary components made by Questyle, however there are some issues you could know as you contemplate the acquisition, so let’s get into all of that!
Classes | Questyle M18i |
|---|---|
Decoding | PCM: 44.1kHz-384kHz (16/24/32bit) DSD: DSD64, DSD128, DSD256 |
Processor | 16-core XMOS316 USB platform |
DAC chipset | ESS Twin ES9219Q DACs |
Enter | USB-C, Apple MFi Licensed |
Output(s) | 3.5mm SE, 4.4mm Balanced |
Bluetooth | 5.4 |
Bluetooth Codec Assist | AAC, SBC, aptX, aptXHD, aptX adaptive, LDAC, LE Audio |
Microphone(s) | Infineon mic module (MEMs), Qualcomm cVc 8.0 |
Battery | 500mAh |
Supported OS | Android, iPadOS, iOS, HarmonyOS, Home windows 10, Linux |
Energy Output | 28mW at 300 Ohms (4.4mm balanced output) |
Frequency Response | 0.1dB (20hz-20kHz), 2dB (20kHz-80kHz)THD: 0.0002% |
Questyle M18i: Strong sound, strong construct
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Loads is happening contained in the M18i. Internally, the DAC makes use of twin ESS ES9219Q DACs and different {hardware} powered by a 16-core XMOS XU316 processor. You additionally get a Qualcomm chipset that features its newest clear voice communications chipset and Infineon MEMS microphones. We’ll discuss these elements extra in a second. There are a number of different issues contained in the DAC, however I’ll go over these as I discuss audio high quality. Examine the spec desk for different odds and technical ends you could be interested in.
The construct high quality could be very reassuring. The unit is small, and all elements are wrapped in a CNC anodized aluminum alloy. There’s a tempered glass display screen on the entrance of the machine with an OLED show. The data you’ll get from the highest row of that display screen is: quantity, acquire stage (Low or High), earbuds/headphone related indicator, and battery cost indicator. Beneath that, you’ll see your pattern price in a bigger font, and under that, the mode and decoding indicators.
Holding the machine vertically with the display screen dealing with you, the highest is the place you’ll discover the three.5mm (SE) and 4.4mm (Balanced) outputs. The suitable facet is the place you’ll discover the delightfully clicky perform buttons. You get an influence button that may also dim the display screen, separate quantity up and down buttons, an MFB or multifunction button that controls acquire and Bluetooth features, and a mode sliding swap that’s stiff and doesn’t really feel like it’ll get free anytime quickly.
You’ll discover one in every of two USB-C ports on the backside of the unit. This one is primarily for information switch, however in PC mode, the unit does cost from the supply it’s related to. The second USB-C port is on the left facet and doesn’t help information. Charging solely.
Testing methodology and tools
I examined the M18i with a number of totally different IEMs and over-ear headphones (circumaural), enjoying FLAC recordsdata (PCM), DSD, and Tidal streams, with it related to varied sources: Google Pixel 9 utilizing USB Audio Participant Professional, iPhone 16 Professional Max, Microsoft Floor Professional 11 utilizing MusicBee.
Sonic imaging, Questyle
General, the M18i is without doubt one of the extra clear, nuanced cell DACs I’ve had the pleasure of testing. Let’s discuss utilizing it to drive the equally clear, analytical Sennheiser IE900s: This pairing is not for bass lovers, although tracks mastered with a heavy-handed low finish sound excellent with regard to their low-end nuance and resolve. Utilizing the IE900s with the acquire set to low and the 4.4mm Balanced connection, I might drive them superbly with the amount solely midway up at 30 of 60 steps.
What’s the “taste profile” of this pairing? Very clear. No colour. An enjoyably massive soundstage for IEMs, however essentially the most compelling sonic function is the nuance. Enjoying the DSF file of Michael Jackson’s “Wanna Be Beginning Somethin’,” there are backing vocals combined to virtually a whisper, you’ll be able to clearly discern through the tune’s intro at 15 seconds in. A function of that blend that will get misplaced in much less clear sound copy with extra coloured DACs and earbuds/headphones.
Concerning tracks mastered with bass emphasis, The Roots’ “Do You Need Extra??!!!?” sounds precisely prefer it ought to, with no coloring of the growth bap heavy bass. The bass remains to be fairly satisfying with this pairing. A PCM file of Marvin Gaye’s “Hassle Man” exposes an superior orchestral association! All of the nuance, layered electrical and analog pianos, saxophones, and cymbals. It’s an engrossing sonic expertise with the M18i. When it comes to signal-to-noise, the M18i could be very darkish!
There isn’t a audible noise through the quiet components of the intro to Whitney Houston’s “I Will At all times Love You.”
My sound take a look at, pairing the M18i with Campfire Audio’s Mammoth IEMs through the three.5mm connection, introduced extra weight and drama to the music with its extra entertaining, punchier sound copy within the low finish and sub-bass. There was some nuance misplaced within the low finish with the IE900 that was realized with the Mammoth IEMs. That is the bass lovers’ pairing.
Sennheiser HD660S2 was the primary pairing that benefited from the excessive acquire choice, even with extra juice flowing by means of the 4.4mm cables. I needed to improve quantity by 9 steps, to 39. Over-ears enable the M18i to “stretch its legs” and increase that soundstage, giving it larger depth and layers as I listened to “Violin Duel” from the Chevalier OST.
The element within the assault and decay of the violins in Violin Duel was prime tier! Subsequent up, Ladysmith Black Mombazo’s ethereal a cappella on Paul Simon’s “Diamonds on the Souls of Her Footwear” was equally pleasurable, being so immersive due to the wealthy timbre and readability offered partly by Questyle’s patented current-mode amplifier SiP expertise present in all of their DACs.
In Bluetooth mode, the sound high quality remains to be pleasant. That stated, there’s a distinction between the wired and Bluetooth 5.4 displays. Nonetheless, due to the broad help for Qualcomm aptX and LDAC HiRes Wi-fi Audio codecs, that distinction is minimal and sure indistinguishable to these new to energetic listening.
Persevering with with the Bluetooth implementation, the Qualcomm chipset gave me higher mic audio than anticipated. Frankly, this Infineon MEMS mic setup within the M18i sounds higher than many Bluetooth earbuds I’ve reviewed, up there with Jabra, Beats, and AirPods Professional. It does not 100% remove background noise, however it provides you a wholesome stability of background noise dampening with crystal clear voice pickup, so you do not sound such as you’re in a closet, as some TWS earbuds do.
General, from cell to PC, the M18i presents a powerful sonic picture. It’s balanced and clear, with superbly layered instrumentation separation. It additionally has the flexibility to go wherever and hook up with virtually something, together with Linux and HarmonyOS.
The M18i is nearly excellent, aside from….
Battery life might be a ache level. One hour of wired hi-res file playback drained the battery from 97% to 41%. My ends in battery testing have been fairly constant throughout modes, aside from PC mode. Meaning the max you’ll be able to anticipate out of the M18i is roughly two hours of playback.
Happily, there’s a function that mitigates the disappointing battery lifetime of the interior 500mAh cell. Switching to PC mode will energy the DAC from no matter machine it’s plugged into. I examined that with my Google Pixel 9, and the telephone’s battery drained at a price of roughly 10% per hour. I examined with the telephone in airplane mode as a result of I wished to see what the pull seemed like with out further elements draining the battery, like weak mobile sign power.
The facet USB-C port additionally helps mitigate the quick battery life. It helps charging throughout playback, so you’ll be able to have a battery financial institution with you on that long-haul airplane experience to maintain the tunes going as you cross the Atlantic or Pacific.
Must you purchase it?
I’ve had the pleasure of testing some splendidly entertaining audiophile-grade cell DACs from iFi, Quedelix, and Fiio, and that is now one in every of my favorites. The sound high quality is without doubt one of the greatest available on the market, with the utility to make sure you get essentially the most bang in your hard-earned buck.
Its MSRP is $400, however it’s at present on sale direct from Questyle’s web site for $350. On the time of writing, it is also on Amazon with a $50 coupon, bringing the worth right down to $300. If you have already got pair of IEMs or wired headphones, contemplate the M18i as you learn critiques of competing merchandise.
A cornucopia of sonic treats!
With lovely timbre, crystal readability, and multidevice compatibility, the Questyle M18i is a top-tier “do-it-all” DAC that might use some enchancment within the battery life division
