USER MANUAL
D503BT Desktop Digital Amplifier
Thank you very much for choosing our products! Please read this
manual carefully before using the product.
①
…………………………LED INDICATOR LIGHT
②
…………………………
POWER NO/OFF(Long press 3S to start, short press to switch bluetooth or
RCA input)
③
…………………………Bass Knob
（
increase clockwise and decrease counterclockwise
）
④
…………………………Treble Knob
（
increase clockwise and decrease counterclockwise
）
⑤
…………………………VOL+/- (increase clockwise and decrease counterclockwise)
⑥
………………………….Bluetooth antenna (bluetooth is optional)
⑦
……………………………Input interface of audio (Such as CD, DAC decoder, mobile phone, TV, etc.,
red to right channel input, white to left channel input)
⑧
……………………………Speaker Output (red to positive, black to negative, L to leftspeaker and R to
rightspeaker)
⑨
……………………………Power interface (DC power shall not exceed 24V)
