xDuoo TA-20 Double Tube Stereo Balanced Desktop AMP Instruction Manual

xDuoo TA-20 Double Tube Stereo Balanced Desktop AMP

Please read this Manual carefully before operating， and keep it for future reference

Safety Instructions

1.  The amp should not be subject to water droplets or water splashes, the machine should not be placed with such as vases a class or filled with liquid items.
2.  The amp is working, the tube will be very hot, please do not touch with hands directly.
3.  Do not disassemble the machine for repairing or modifying, this product does not have the parts or tools for the user to repair on their own, the maintenance of the machine requires qualified personnel to operate. Opening the shell or modifying the internal circuit will make the maintenance difficult, but also the performance or quality of the machine could be affected.
4.  Please place the unit in a well-ventilated, cool and dry, clean place, away from direct sunlight, heat, vibration, dusty, damp or cold place. To be well ventilated, the machine should leave at least the following distance between the wall.

Operation Notes

1.  Before turning on the power supply Please check again that all connections are correct and if there are any problems with the cables.
2.  Using mobile phone Using mobile phone near the amp may cause noise when playback. If this happens, move mobile phone away from the amp.
3.  Moving the amp Disconnect the power cord and unplug the power cord from the power outlet. Before moving the unit, disconnect the cables of other system devices

Product Description

TA-20 is a vacuum tube balanced high-fidelity small desktop headphone amplifier. Very rich of Input / output interfaces, there is one set of single- ended output port, and a group of balanced input, one set of balance output and one set of single-ended, equipped two 12AU7 tubes as a pre-amplification, and high quality transistor for the expansion, the structure of the tube and transistor combination, can provide delicate soft voice at the same time without losing the explosive power with the sense of speed, coupled with the provision of +/- 15V high-voltage power supply as a power source for the post- amplifier, can easily drive a variety of low resistance or high impedance headphones, and greatly enhance the sound stage dynamics, can be good for restoring the music scene. As a balanced amp, the balance output is much better than ordinary output, its separation, resolution, sound field, background purity, all had been greatly improved, allowing you to enjoy the pure and perfect sound.This product is suitable for people who have relatively high requirements for sound quality, suitable for home use or using in office, can be connected with a variety of high-end player sound sources to get high- quality sound quality, perfect reproduction of the sound field.

Product Features

•  Full-balanced input / output, greatly enhance the separation, resolution, sound field, background purity;
•  Dual 12AU7 tube for audio processing, sound sweet and delicate;
•  Using transistor for the expansion circuit, with a strong load capacity, can easily promote a variety of low-resistance headphones;
•  Customized Metalized Polyester Capacitors as tube Output Coupling Capacitors;
•  Japan ELNA SILMIC (II) capacitor for coupling capacitors, sound crystal, sweet;
•  Use of Panasonic CE capacitor as the main filter capacitor, sound supple, warm and soft, high-frequency gorgeous;
•  TI professional volume adjustment IC, to solve the carbon potentiometer channel imbalance problem in the small volume;
•  Power input using adaptive mode, can enter AC100V ~ 240V voltage, do not need to manually adjust;
•  Built-in over-voltage protection circuit to prevent the input voltage is too high and damage the machine;
•  Built-in output relay protection, to avoid the impact of the switching on/off, but also protect the headphones and amp under special situations;
•  Built-in DC / over current protection circuit, internal exception protection, after troubleshooting, the amp can be restored by restart;
• High-strength aluminum alloy CNC processing shell, with excellent shielding characteristics.

Instructions

1.  Display: Displays the current volume;
2. -pin balance headphone jack, support 16 ~ 600 Ω headphones;
3.  Input channel indicator, lights on when been chosen;
4.  6.35 headphone jack, support 16 ~ 600 Ω headphones;
5.  Protection indicator, the amp is abnormal, will start the internal protection circuit, and the red light will flash;
6.  Volume adjustment knob, short press the knob to switch the input channel, turn counterclockwise to reduce the volume, clockwise to increase the volume;
7.  AUX1 unbalanced analog stereo input port, red for the right channel, white for the left channel;
8. AUX2 unbalanced analog stereo input port, red for the right channel, white for the left channel;
9. BALANCE： balanced analog stereo input port;
10. AUX analog stereo output port, the sound source is taken directly from AUX1 or AUX2;
11.  AC power input port, input AC100 ~ 240V;
12.  Power switch.

Parameters and Accessories

• Power supply: External power (AC100-240V)
• Output power PHONE: 2000mW (32 ohms); XLR: 2000mW (32 ohms)
• Frequency response: 10Hz ~ 100KHz (± 1dB)
• Gain: + 18dB
• Distortion: ≤ 0.1% (1KHz, 32 ohm load)
• Signal to noise ratio: 115dB
• Adaptable headphone impedance: 16 ~ 600Ω
• Size: 23 12 10.5cm
• Weight: 1.55Kg
• Accessories: Power cable 1, Manual 1, Warranty card * 1

Quick Start Description:

On / Off

1.  First connect the power cord and signal cable of the machine and press the power switch [POWER] on the panel to the [ON] position, the power indicator lights on, the tube needs to warm up for 40 seconds, before it turns into the normal working condition.

2.  Turn the power switch [POWER] on the panel to the [OFF] position, now in the closed state. If you do not use the amp for a long time, please disconnect the power supply.
   Selecting the source

3.  Press the volume knob to select the input source channel, select the AUX1 / AUX2 input.
   Headset volume control

4.  Turn the [VOLUME] knob on the machine panel to adjust the volume of the headset, turn it clockwise to increase the volume, counterclockwise to reduce the volume level.

Connection

Input wire connectionCD / DVD / MP3 player Line out / AUX OUT output interface directly connect with the audio cable to the machine’s AUX1 IN / AUX2 IN interface, landscaping and amplification the front-end sound source to drive the headset, get good listening sense.

Common Issue

in again
Power switch isn’t switched right| Restart

No sound from the headset

| Audio cable isn’t connected right| Check and re-connect
Audio source setting issue| Check the setting of front-

end audio device

Tube isn’t plugged right| Plug it in again
Volume too low| Tune to normal level
Chose wrong input tunnel| Switch the input tunnel

The failures above or other failures happened, and cannot be troubleshooting with the method above, please contact with the local dealer, and send with the warranty card to the dealer for maintenance, do not disassemble the machine for unautho-rized repair.

Warranty Information

The company’s products can have 12 months of free warranty service from the date of sale, if the product not in 12 months warranty period anymore, the company will have to charge for the parts and other cost for repairing. Accessories are not covered under warranty.

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