Features ES9038PRO DAC Chip From ESS Sabre

The latest and greatest desktop ES9038PRO DAC chip with eight independent D/A converters is employed in the M15S. Each channel uses four D/A converters in parallel to form a fully differential output for a rich and highly resolving sound. The FiiO M15S supports up to 384kHz-32bit and DSD256 (Direct Stream Digital) natively and supports global 8X MQA decoding.

Exceptional Power Output With Five Gain-Level Settings

The FiiO M15S offers five-level gain settings allowing you to switch between low, medium, high, and over-ear headphone gain settings when using battery power. The enhanced over-ear headphone gain level is also available; when it is under USB power mode, enabling undistorted power output up to 1200mW per channel, enough to drive a wide variety of IEMs and headphones. 

Experience Music Wirelessly With Bluetooth and WiFi Support

FiiO M15S supports Bluetooth v5.0 and supports the latest Bluetooth codecs. The M15S wireless capabilities include AirPlay, DLNA streaming and transmission, and Bluetooth. The Qualcomm QCC5124 chips, also used in other FiiO products, manage Bluetooth, enabling the M15S to handle 2-way Bluetooth transmission and reception. It supports LDAC, aptX Adaptive, aptX LL, aptX HD, aptX, AAC, and SBC in Bluetooth reception mode. It is compatible with LHDC, LDAC, aptX HD, aptX, AAC, and SBC in Bluetooth transmitter mode. FiiO M15S also provides dual-band 2.4/5GHz WiFi support with DLNA transmission and reception, AirPlay, WiFi transmission, Roon Ready, etc.

Continuous Playtime Of 10.5 Hours On a Single Charge

Despite its portable size, the FiiO M15S features a large 6200mAh battery that ensures all-day listening, whether you are using Single-ended or Balanced output. Battery charge optimization and battery protection systems ensure that the battery will last for a long time. It provides a battery life of up to 10.5 hours using the Single-ended headphone out and up to 9 hours using the Balanced connection. You don't have to worry about running out of juice as the M15S supports fast charging and gets fully recharged in approx 3.5 hours.

Stable & Smooth Performance With Android 10 OS

It features Qualcomm 660 processor and Android 10 OS so that you get the ultimate and limitless experience. With the stable and smooth combination of the Qualcomm Snapdragon 660 and Android 10, you can start listening quickly with the M15S. With the ability to freely install third-party apps and with no global SRC, you can be sure to listen to the music you want in the highest quality. The FiiO M15S has an internal memory of 4GB and internal storage of 64GB (46GB usable) with expandable storage of up to 2TB with the provided TF card slot.

Dedicated Modes For Portable or Desktop Use

When in the dedicated desktop mode and under USB fast charging, the M15S will transform into a desktop device and work without the battery. The battery will neither be charged nor discharged, preventing premature degradation of the battery under this mode. The FiiO M15S not only features the "desktop/portable dual power supplies'' as seen in other FiiO products but is also equipped with an automatic "auxiliary DC power supply." The M15S can automatically recognize when fast charging through USB is being used and automatically switches to use the highest-voltage power supply, leading to an increase of 26.67% in power supply for even more power output. 

Five Operational Modes

The FiiO M15S  further offers five operational modes like Android mode, Pure Music mode, Bluetooth Reception mode, USB DAC mode and AirPlay mode, and Roon ready mode for you to choose from. Each has its significance allowing you to have complete control over the M15S in various used-case scenarios.

Graphene Heat Dissipation Technology

FiiO has incorporated a Graphene heat dissipation technology into the M15S to provide cooling for consistent high-power output. Advanced and highly efficient heat dissipation design allows the M15S to maintain stable temperatures and continuously deliver high power output. The M15S has a dedicated metal shield, graphene, and high thermal conductivity silica gel over hotspots for maximum heat dissipation. To shield from interference as much as possible, the M15S employs a nickel-copper shield. 

Multi-Stage Audio Circuit Fused With Crystal Oscillators

The M15S features a multi-stage audio circuit with IV, LPF, gain adjustment and amplifier sections. High-precision and low-noise film resistors ensure more accurate signal reproduction and channel balance. The Panasonic low-loss metallised film capacitors guarantee extremely low harmonic and phase distortion within the LPF part of the circuit. Audio data is passed through a FiiO-developed 4th-gen FPGA with phase-locked loop technology, which works with two custom Japanese NDK femtosecond crystal oscillators to provide a high-precision and low-jitter unified clock source for the entire audio architecture. This design architecture is all done in the pursuit of purer sound.

Overheat & Battery Protection

The overheat protection and battery protection systems are among the many safeguards that ensure the M15S can consistently maintain its high power output, letting you listen with fewer headaches.