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The Questyle M15i Blues Blue and Electro Purple are color editions of the same portable USB DAC and headphone amplifier; the reported difference is in their tuning and perceived sound, not their listed core features. Headfonia found Blues Blue more organic and easier to pair, while Electro Purple sounded colder and more clinical in its system. Audiomonsta’s impressions differed in some respects, so neither description should be treated as a universal result.
What the two M15i editions share
Questyle lists Blue, Purple, and Black finishes for the M15i. Both editions in this comparison are specified with an ESS ES9281AC DAC, 3.5 mm single-ended and 4.4 mm balanced headphone outputs, and a manual gain switch. Questyle advertises PCM decoding up to 768 kHz/32-bit and DSD512. These are manufacturer-published specifications, not independent compatibility or performance tests. Questyle’s M15i product page has the product details.
Questyle Japan’s distributor announcement gives the aluminum-alloy body dimensions as 61.8 × 27.2 × 12 mm. It lists maximum output at 300 ohms as 11.97 mW from the 3.5 mm output and 22.60 mW from the 4.4 mm output; treat these as distributor-published figures, not independently verified measurements. The June 16, 2025 announcement also specifies PCM 44.1–768 kHz and DSD64–DSD512 support.
How the Blues Blue and Electro Purple sound
Headfonia reviewer Rudolfs described Blues Blue as more organic and easier to pair with the reviewer’s equipment. Electro Purple came across as colder and more clinical. The review reports listening with a Windows 10 computer, Samsung Galaxy Note S25 Ultra, MacBook Air M1, and several headphones and IEMs. Questyle supplied both review units free of charge, as disclosed by Headfonia’s August 2026 review.
#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
Audiomonsta also reported differences during IEM listening, but its descriptions do not align in every respect with Headfonia’s. Audiomonsta explicitly frames its evaluation as subjective. Its review lists 2.624 Vrms balanced and 1.895 Vrms single-ended under stated 300-ohm test conditions; these are review-source figures, not manufacturer-confirmed specifications. Audiomonsta’s review provides its listening account.
The accounts are best read as evidence that the editions may sound different to reviewers in their respective setups—not as proof that every listener will hear the same tonal contrast. Your headphones or IEMs, source, fit, volume matching, and preferences can affect which presentation seems more natural. If possible, audition both with the gear you plan to use.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
Outputs, gain, and device compatibility
The 3.5 mm output is for single-ended headphones and earphones; the 4.4 mm output is for compatible balanced connections. Choose based on your cable and device rather than assuming balanced is automatically better. The manual gain switch lets you select gain for the connected load; the published maximum-output figures are specified at 300 ohms and do not establish how every headphone will perform.
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Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallQuestyle advertises compatibility with computers, smartphones, laptops, iOS, HarmonyOS, Android 5.1+, and Windows 10+. These are manufacturer claims, not a guarantee for every device or configuration. Audiomonsta notes that Lightning iOS devices require a Lightning-to-USB-C OTG cable. For a USB-C phone, tablet, or computer, check the connector, device support, and any required adapter before buying.
Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
Price and buying checks
Prices are snapshots, not a reliable current market quote: Questyle’s page displayed $169 sale and $249 regular pricing when accessed, while Headfonia reported approximately $199 per edition in its August 2026 review. Check the live listing for the exact color, seller, shipping, and return terms. Questyle Japan’s announcement named Amazon among Japanese retailers, but that does not establish current stock or availability of these two colorways.
Quick Recap
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
- Choose Blues Blue if the organic presentation described by Headfonia sounds closer to your preference, while remembering that another reviewer’s impressions differed.
- Choose Electro Purple if you prefer to investigate the more clinical presentation Headfonia reported; treat that description as one reviewer’s experience, not a guarantee.
- Confirm your headphone cable matches 3.5 mm single-ended or 4.4 mm balanced, and check whether the manual gain switch suits your headphones.
- Verify the connection path for your phone or computer, especially if it has a Lightning connector.
- Compare the current price and seller terms for the exact edition before ordering.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
