Questyle M15C USB-C Headphone Amplifier with 3.5mm & 4.4mm Outputs

Questyle M15C Portable Headphone Amplifier DAC

The Questyle M15C is a compact USB-C headphone amplifier and DAC built for listeners who want studio-grade sound on the go. Whether you're pairing it with a smartphone, laptop, or PC, this portable headphone amplifier decodes high-resolution audio up to PCM 384kHz/32-bit and native DSD256, turning everyday listening into a genuinely hi-fi experience.

Powered by four CMA engines, the M15C delivers a clean, low-noise signal through both 3.5mm single-ended and 4.4mm fully balanced outputs. Manual gain adjustment lets you fine-tune output power to match your headphones, so whether you're using sensitive in-ear monitors or power-hungry over-ear cans, the amplifier adapts to you rather than the other way around.

Designed for real-world use, the M15C is MFi certified and works seamlessly across iOS, HarmonyOS, Android 5.1+, and Windows 10+. Slip it into a bag with your phone or laptop and get lossless, distortion-free audio wherever you listen.

Key Features

• High-Resolution Decoding (PCM 384kHz/32-bit, DSD256): The M15C decodes audio from 16-bit/44.1kHz all the way up to 32-bit/384kHz PCM, plus native DSD256, so you hear music the way it was mastered instead of a compressed version of it.

• Dual Outputs – 3.5mm and 4.4mm Balanced: Four built-in CMA engines drive both a 3.5mm single-ended output and a 4.4mm fully balanced output, giving you flexibility to use whichever headphones or IEMs you already own.

• Manual Gain Adjustment: Switch gain modes to match your headphone's sensitivity and impedance, preventing hiss on sensitive IEMs and underpowered sound on demanding headphones.

• MFi Certified Cross-Platform Compatibility: Works with iOS, HarmonyOS, Android 5.1 and above, and Windows 10 and above, so one dongle covers your phone, tablet, and computer.

• Low Noise Floor, High Signal-to-Noise Ratio: Engineered for a near-silent background with low distortion, letting quiet passages and fine detail come through clearly instead of getting buried in hiss.

• Truly Portable Design: Small enough to carry daily, the M15C turns any compatible phone, laptop, or PC into a source capable of driving demanding headphones properly.

Why Choose This Product Questyle M15C Portable Headphone Amplifier

Built-in phone and laptop audio is rarely enough to do good headphones justice. The Questyle M15C solves that by adding a dedicated DAC and amplifier stage between your device and your headphones, unlocking detail, dynamics, and volume headroom that onboard audio simply can't deliver.

Because it supports both single-ended and balanced output, you're not locked into one type of headphone or cable — the M15C grows with your setup as you upgrade gear. The manual gain control also means you get a properly matched, distortion-free signal instead of a one-size-fits-all output.

For anyone who streams lossless music, listens to DSD or high-res files, or simply wants cleaner sound while working, commuting, or gaming, the M15C offers a simple, plug-in upgrade without the bulk of a full desktop amplifier.

Technical Specifications

Compatibility

• Supported Devices: Smartphones, laptops, and computers with a USB-C or USB-A port (via included converter)

• Supported Operating Systems: iOS, HarmonyOS, Android 5.1 and above, Windows 10 and above

Package Includes

• M15C USB DAC Headphone Amplifier x1

• Type-C to Type-C Cable x1

• Type-C to USB-A Converter x1

• User Manual x1

Frequently Asked Questions

Is the Questyle M15C compatible with my phone?

Yes. The M15C is MFi certified and works with iOS, HarmonyOS, and Android 5.1 or later, so it connects to most modern smartphones.

Can I use the Questyle M15C with a laptop or PC?

Yes, the M15C supports Windows 10 and above and connects via USB-C, with an included Type-C to USB-A converter for laptops and desktops without a USB-C port.

What audio formats does the M15C support?

It decodes PCM from 16-bit/44.1kHz up to 32-bit/384kHz, along with native DSD256, covering standard and high-resolution lossless audio files.

What's the difference between the 3.5mm and 4.4mm outputs?

The 3.5mm output is single-ended for standard headphones, while the 4.4mm output is fully balanced, typically offering more power and a cleaner signal for compatible headphones and IEMs.

Does the M15C add background noise or hiss?

No. The M15C is designed with a low noise floor and high signal-to-noise ratio, so sensitive IEMs stay quiet even at low volumes.

What's included in the box?

You get the M15C amplifier, a Type-C to Type-C cable, a Type-C to USB-A converter, and a user manual.

Is manual gain adjustment necessary for all headphones?

It's optional but useful — gain adjustment helps match output power to your specific headphones, improving sound quality on both sensitive and power-hungry models.

Get the Questyle M15C Portable Headphone Amplifier at the best price in Bangladesh, with fast delivery and warranty support.