Douk Audio U3 Headphone Amps, Mini Hi-Fi Amplifier for Home Desktop PC 6.35mm / 3.5mm Headsets, Class A, RCA Input, DC 5V
Douk Audio U3 mini class A headphone amp with a TI NE5532 op amp and RCA input, for 6.35mm and 3.5mm headphones. A compact desktop amp that suits high-impedance headphones.
Price range: See on Amazon
What we liked
- + Class A design with a TI NE5532 op amp and 1300mA output stage is described as warm, with ultra-low distortion.
- + Pluggable op amp socket lets tinkerers swap op amps, and DC 5 to 20V wide input voltage is supported.
- + The listing says it drives high-impedance models such as HD600 and DT880 class headphones.
Trade-offs
- - Amp only, with no built-in DAC, so it needs an analog source through RCA, unlike the original FiiO E9 and E7 bundle.
- - Runs from a DC 5 to 20V input, so a suitable power supply is needed, and the listing is worded loosely, so verify details.
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