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Product Description:
Treble adjustment range: ±6dB
Base adjustment range: ±10dB
Product power supply: DC 12V / 1A
Frequency Response Range: 20Hz - 20kHz (±3dB)
Signal-to-Noise Ratio: ≥98dB
Distortion: ≤0.3%
Input Interface: Gold Plated RCA
Output Interface: Gold Plated RCA
Bare Metal Size: 4.6 x 3.9 x 1.3 inches (118.5 x 98 x 33 mm) (without protruding part).

Q:
Q:All my lines are connected, but there is no voice output?
1) Check the POWER indicator is on or off the switch if it is not on. After the indicator is still on, you can find the equal voltage output, press the power button (must be 12V), then test.
2) If the indicator light is lit, check whether the VOL knob is at the lowest state, such as clockwise as the smallest state.
3) If both of the above are normal, check whether the playback device of the input source pause, mute, or volume is minimum.

Q: Why the sound is broken?
This product is not only a previous product, but also a zoom function that allows you to adjust the volume of the device to the maximum level, so it is easy to distortion. You only need to adjust the volume in advance or post.

Q: Why is the same volume of the machine and access to different sources (e.g. before CD-, etc) the sound volume is not the same?
Different playback output electrical signal amplitude is not the same as the phone is normally 0.35MV and CD is 1V. Natural sound size will vary.

Q: Why is the speaker loud?
If you do not use the original standard power supply, please replace the power supply before testing. Many power supplies on the market have a large interference coefficient, which produces loud current sound.

Q: If you dont play the sound source after inserting the input cable, the speaker will not beep sound.
The interference signal is amplified to amplifier so that if the signal line is not shielded the load, it is recommended to replace the shielded signal line or remove the signal line.

Q: Why buy a triband that is not very clear but a normal days work gore before class began to hear so hard?
The tube is a very sensitive device, and the temperature generally reaches a degree of degree to play the best results and is generally about half the time after the warm-up is heard very naturally.

Q: Can I replace the upgrades of the tube?
Yes, we now have a test match factory 6K4/6J4/GE5654/6AK5/6*1N, which can be directly replaced, different tubes will have very different sounds.

Q: Can I replace the tube with a power supply?
No, because the high pressure inside the machine is working, hot plug valve burns the machine and burns the tube very easily.

Package Included:
Amplifier
12V / 2A Power Adapter
2 x 6J1 Gallons Tube