1. Not inlcude power adapter, recommend to use original high-quality power adapter (DC5V/≥2A ).
U10 won't work normally if the current below 2A.
2. Inputs (3.5mm / RCA) and outputs (6.35mm/3.5mm jack) are connected in parallel, in other
words, all inputs and outputs work simultaneously. Don't connect 3.5mm and RCA inputs at
the same time, or else audio signals will be mixed.
3. Pluggable tube socket design, 6A2 can be replaced by the following models:
6J1、6ж1П、6AK5、6BC5、403A/B、5654、EF40、EF95、CV850、6J2、6ж2П、6AS6、
CV2522、EF11/732、CV4011、6J3、6ж3П、EF96、CV848、6BC6、6AG5、 6J4、6ж4、
6136、6BX6、6AC7、EF94、6AU6、6K4、6K5、6K4П、6BA6、6DA6、EF89/93、5749.
4. U10 can easily drive all headphones even with high-impedance such as HD580/HD600/
HD650/ K701/K702/Q701 / DT880/T70/T90 / SR225/SR325/RS1e etc.
Warm Tips
U10 Mini Tube Headphone Amplifier
User Manual
Introduction
U10 mini headphone amplifier, with stereo 3.5mm AUX and RCA inputs and dual headphone
jacks (3.5/6.35mm) output up to 1100mW, easily to drive all 18-600Ω headphones; Innovative
built-in voltage boost circuit, U10 always works at a high voltage of 24V even only powered by
DC 5V, 2PCS 6A2 tubes are adopted to soften and warm the audio, both tubes and op amps
use pluggable sockets, convenient for tube rolling, op amp upgrading and sound-shaping.
How to Use
1. Connect the power adapter and U10 via the default USB to DC cable firstly,then insert power
adapter to the socket.
2. Connect 3.5mm or 6.35mm headphone to the output of U10.
3. Correctly connect your audio source to the corresponding inputs of U10 amp with high-quality
3.5mm AUX cable or RCA cable.
4. Clockwise rotate the main knob to turn U10 on.
5. Play music on your audio source, you can turn up or down volume via volume knob.
6. After use, please anti-clockwise the knob to the leftmost end until U10 is turned off, then
disconnect the power adapter.
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