PC: Connect as a USB DAC, totally powered by the computer.

BT: Bluetooth DAC and amp, powered by the BTR15’s internal battery; when connected via USB, it can be charged.

PHONE: Connect to a phone as a USB DAC dongle, powered by the BTR15’s internal battery.

Global parametric EQ
Be the master of your music

The BTR15 features a global parametric equalizer (PEQ). Through FIIO’s self-developed PEQ algorithm and user interface, in any mode* you can choose the exact frequencies to be adjusted along with their gain levels and bandwidth – allowing you to fine-tune the sound to exactly the way you want it.  

PEQ notes: 
*BT mode PEQ adjustments are implemented through the QCC5125 DSP with support for LDAC and other Bluetooth formats up to 96kHz/24bit.
*PC/PHONE mode PEQ adjustments are implemented through the XMOS XU316 with support up to PCM 192kHz.
*PC/PHONE mode PEQ adjustments are implemented through the XMOS chip. Enabling or disabling the PEQ, USB will restart and disconnect.

MQA Full Decoder for master-quality sound

The BTR15 supports MQA Full Decoder*, which means the MQA decoding can be achieved in any music app. This allows for high-resolution, master-level sound quality in reasonably sized files well-suited for your mobile device.

*Supports up to 384kHz sampling rate

Dual curved glass
Dual upgrades to look and grip

With the BTR15, FIIO uses hot-bent curved glass for the first time – embedding it on both the front and the rear of the device. Not only does this make the device easier to hold, but it also gives the BTR15 a more attractive and 3D appearance. Together with the aluminum alloy middle frame, they make the BTR15 a comfortable device to handle – you won’t be able to put it down once you pick it up. 

Like its bigger brother the BTR7, the BTR15 also features a large display – a brilliant 0.96-inch OLED display. This display not only allows displaying more information at once, it also allows for larger display fonts – making it easier for you to see the device status and change various settings. Moreover, it is the rarely seen device that supports bilingual languages, Chinese and English, among similar products.

0.96-inch OLED display
See all the info with just a glance

Dual outputs
Covering all angles

In addition to the standard 3.5mm single-ended headphone output, the BTR15 also comes with the widely-used 4.4mm balanced headphone output – featuring greater contact reliability and durability compared to the 2.5mm balanced out. The dual outputs ensure you can use the BTR15 with more headphones, for more remarkable listening experiences.

3.5mm single-ended headphone output

4.4mm balanced headphone output

Independent power supply for amp
Explosive power

Electricity is the mother of sound. Feiao engineers have carefully designed an independent power supply system for DAC ES9219MQ built-in earmuffs, so that earmuffs no longer share the power supply with DAC and the power supply is purer. In addition, the uniquely designed external power supply has the characteristics of low noise and high current, which increases the balanced output power of BTR15 by 40% to 340mW, and can easily meet the needs of portable use.

You don’t have to use the 4.4mm balanced output to enjoy the benefits of increased output power. In order to improve the performance of the BTR15 in every aspect, FIIO connected the headphone outputs in parallel to also greatly increase the output power of the 3.5mm single-ended output to better drive low-impedance headphones, allowing you to better unlock their potential.

Parallel output, more power

Comprehensive battery protection
From worry to peace of mind

In order to alleviate concerns about battery health, FIIO engineers have implemented a number of software and hardware measures to comprehensively protect the BTR15’s battery.

Battery isolation: 

Durable high-temperature resistant battery:

Built-in temperature sensor:

When connected to a computer and used in USB DAC mode for long periods of time, the BTR15 can stop the battery from being charged and can be totally powered by the computer, avoiding battery degradation;

more resistant against high temperatures for longer durability;

dynamic charge and discharge detection and charging current automatic adjustment based on temperature* effectively prevents thermal damage to the battery.

*Detected high temperatures will result in charging current being adjusted. Depending on the device’s current state, charging may be reduced in speed or turned off.

Parts list

①------------------------------------------------------------BTR15*1

②--------------------------------Type-C to Type-C data cable*1

③-------------------------------------------------USB adapter*1

④----------------------------------------Removable back clip*1

⑤--------------------------------------------Quick start guide*1

⑥-----------------------------------------------Warranty card*1