• Douk Audio U5 - WHAT? $57 for a 1400mW Fully Balanced Amplifier?——Reviewed by @the Honest Audiophile

• 【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.

• 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

User manual of Douk Audio U5

Warm tips

Without DC 5V power adapter, you can use your phone charger, input over 5V will result in damage.