Features 【Fully balanced headphone amplifier】Adopting fully balanced amplifier circuit and innovative circuit design, the amplifier circuit of U5 always works at a high voltage of 24V even if input DC 5V, with wide frequency response extension, excellent transient response, excellent purity and transparency, and good dynamic range. 【Easily to drive low or high impedance headphones】For a total power output of up to 1400mW under a 32Ω load, U5 can easily power headphones with any low or high impedance (18-600Ω). Volume knob allows you to smoothly adjust volume without any undesirable noise nor any channel imbalances. 【Pure analog design to reproduce music truly】Pure analog amplification circuit and analog control, show you the truest sound, all aspects are in the top-class such as sound field, sound position, details etc.. Adopt original JRC4580 classical op amp, pluggable socket design, convenient to upgrade different op amps to enjoy other sound styles. 【Most cost-effective amp on the market】Mini size and exquisite appearance, and with low distortion, high power and a pure, uncolored sound, you'll experience subtle details and shocking swings in your music effortlessly. U5, the best helper for all xlr/4.4mm headphones to improve their sound quality. Parameters: Audio input: stereo L/R XLR ( 3-core, female) Audio output: XLR ( 4-core, female) / 4.4mm Output power: ≥1400mW (32Ω) Matched headphone impedance: 18-600Ω Frequency response: 20-30KHz Signal to noise ratio: ≥110DB THD: 0.005% Input voltage: DC 5V (recommend above 1A) Dimension(W*D*H): 68*69*28mm / 2.68*2.72*1.50in Net weight: 149g / 0.33lb Package weight: 500g / 1.10lb Packing List 1*U5 Headphone Amplifier 1*DC 5V Power Adapter

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