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9. The BL20A can be used as a pre-amp?
• Yes. There is a PRE-OUT interface on the rear panel, which
can be used as a preamplifier.
10. Do I have to connect all the outputs of BL20A? Can I
only connect 2 speakers? Or just use it as a
preamp?
• You don’t need to connect all the outputs. You can connect 2
passive speakers only. Or you can connect it to the pre-out
as a preamplifier. And you can connect all the outputs
simultaneously.
11. Sound quality is not good?
• Make sure all the cables are fully connected.
• Adjust the treble and bass control of the BL20A to achieve
the right tone.
• Please try to change the sound source and cables to test.
12. Why the sound cut in and cut out?
• Try to reduce the sound of the sound source.
• Try to change the audio source to test.
• Reduce the volume of the treble and bass knob on the
BL20A.
• Ensure that the positive and negative poles of the speaker
output do not touch together. Some relatively large banana
plugs are easy to touch together and cause a short circuit.
13. Does the BL20A support Bluetooth aptX and Low
Latency?
• No. The BL20A does not support Dolby, aptX, aptX HD and
aptX Low Latency.
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