Douk Audio U5PRO HiFi Fully Balanced Headphone Amplifier, Mini Stereo Amp for XLR and 4.4mm Headsets, Replaceable Op-Amps, 18-600Ω Compatibility, 1500mW Output Power

Warm Tips Without DC 5V power adapter. Recommend using a USB phone charger of DC 5V (≥1A). Input over 5V will result in damage and U5 PRO won't work normally if the current is below 1A. Parameters: Audio input: stereo L/R XLR (3-core, female) Audio output: XLR (4-core, female)/4.4mm Output power: ≥1500mW (32Ω) Matched headphone impedance: 18-600Ω Max output amplitude voltage: ±14V Frequency response: 20-30KHz SNR: ≥110DB THD: 0.005% Input voltage: DC 5V (≥1A) Dimension (W*D*H): 70*82*38mm / 2.76*3.23*1.50in Net weight: 172g / 0.38lb Package weight: 300g / 0.66lb Packing List: 1* U5 Headphone Amplifier 1* USB to DC Cable

• Fully Balanced Amplifier Design: Features a fully balanced circuit that operates at ±14V even with DC 5V input, delivering exceptional frequency response, transient dynamics, and pure, transparent sound quality.
• High Power Output & Broad Headphone Compatibility: Provides up to 1500mW output at 32Ω load, making it capable of driving headphones ranging from 18Ω to 600Ω impedance for various audio needs.
• Classic OP+BUF Architecture: Incorporates OP42 and BUF634 in a classic OP+BUF setup with a pure DC amplification circuit, ensuring precise sound reproduction with low distortion and excellent detail resolution.
• Analog Design with Replaceable Op-Amps: Purely analog amplification and control offer natural sound reproduction with excellent soundstage and detail. Replaceable op-amp slots support models like OP17, AD797, AD843, AD847, and OPA627, enabling users to customize sound profiles.
• Compact & Portable with Exquisite Build: Small and portable design with high-quality craftsmanship, delivering low distortion, high power output, and pure sound. An ideal solution for enhancing XLR and 4.4mm headphone audio performance.