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This page lists the complete technical specifications for the FiiO BTR3K portable Bluetooth DAC/amp. The BTR3K is a clip-on wireless headphone amplifier and DAC supporting LDAC, aptX HD, and both balanced (2.5mm) and single-ended (3.5mm) headphone outputs. All specs sourced from the FiiO official product page.
Overall Rating: 7.8/10 — Exceptional Bluetooth portability and LDAC quality, with sufficient power for IEMs and easy-to-drive headphones.
Full Specifications
DAC and Amplifier
| DAC Chip | AK4377A × 2 (fully balanced L+R) |
| Output Power (Balanced, 32Ω) | 78mW |
| Output Power (SE, 32Ω) | 25mW |
| SNR | 122dB |
| THD+N | -107dB (~0.0014%) |
Bluetooth and Connectivity
| Bluetooth Version | 5.0 |
| Supported Codecs | LDAC (990kbps), aptX HD, aptX, AAC, SBC |
| Multipoint Pairing | Yes — 2 devices simultaneously |
| USB DAC Mode | Yes (wired USB connection) |
| Headphone Output 1 | 3.5mm single-ended |
| Headphone Output 2 | 2.5mm balanced |
| App Control | FiiO Control app (Android only) |
| App Features | EQ, audio filters, device settings |
Battery
| Battery Capacity | 330mAh |
| Battery Life | ~11 hours |
| Charge Time | ~1.5 hours |
| Charge Port | USB-C |
| Battery Check | Via Android device (functionality varies) |
| Auto Standby | Yes (when no audio signal) |
Physical
| Dimensions | 58 × 25 × 11mm |
| Weight | 23.5g |
| Form Factor | Clip-on (rear clip included) |
| Controls | Physical playback + volume buttons |
In the Box
| Included | USB-C cable, rear clip, lanyard, warranty card, manual |
Where to Buy
FiiO BTR3K Receiver Amplifier Bluetooth Headphone Amp High Resolution Support aptX HD/aptX LL/LDAC for Car Audio/Home TV/Speaker/Smartphones/PC (3.5mm/2.5mm Output)
