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AmplifiersHeadphone AmplifiersDACsDiscontinued
Estimated price (community-sourced)
$50.64
Around — community and catalog average, updates slowly
About the BTR3K
The BTR3K is a compact Bluetooth headphone amplifier and USB DAC. It uses a Qualcomm CSR8675 Bluetooth chip and two AK4377A DACs, and provides both 3.5 mm single-ended and 2.5 mm balanced headphone outputs. It supports Bluetooth 5.0, hands-free calling with a built-in microphone, and app-based settings.
Specifications
Bluetooth: 5.0; Bluetooth chip: Qualcomm CSR8675; DACs: 2 × AK4377A; supported Bluetooth codecs: SBC, AAC, aptX, aptX LL, aptX HD, LDAC; outputs: 3.5 mm single-ended and 2.5 mm balanced; USB: Type-C, USB DAC up to 48 kHz/16-bit; output power: 25 mW (3.5 mm, 32 Ω), 78 mW (2.5 mm balanced, 32 Ω); recommended headphone impedance: 16–100 Ω; battery capacity: 330 mAh; battery life: up to approximately 11 hours (varies by output and operating mode); charging time: up to 1.5 hours; dimensions: approximately 58 × 25 × 11 mm; weight: approximately 23.5 g; built-in microphone and app support.