Fosi Audio BT30A User Manual

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this manual carefully before using the product.
Front & back surface interface of volume adjustment&mechanical
switch version
① ………………………… POWER NO/OFF
② ………………………… LED INDICATOR LIGHT
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 ………………………… BT/RCA Option switch
⑧ ………………………… Input interface of audio (Such as CD, DAC decoder, mobile phone,
TV, etc., red to right channel input, white to left channel input)
⑨ ………………………… Speaker Output (red to positive, black to negative, L to leftspeaker
and R to rightspeaker,SUB to subwoofer)
⑩ ………………………… Power interface (DC power shall not exceed 24V)

Fosi Audio BT30A Specifications

General

Amplifier Type	Class D
Bluetooth Version	5.0
Input	RCA, Bluetooth
Speaker Impedance	4Ω - 8Ω
Frequency Response	20Hz - 20kHz
Bluetooth Range	10m
Output	Speaker output
Power Supply	24V DC
Input Voltage	24V DC

Summary

Front and Back Surface Interface

POWER NO/OFF

Power switch for the device.

LED INDICATOR LIGHT

Indicates the operational status of the device.

Bass Knob

Adjusts the bass frequency response.

Treble Knob

Adjusts the treble frequency response.

VOL+/- Control

Controls the overall volume level.

Bluetooth Antenna

For optional Bluetooth connectivity.

BT/RCA Option Switch

Selects between Bluetooth and RCA input.

Audio Input Interface

Connects external audio sources like CD, DAC, mobile phone.

Speaker Output

Connects speakers, including subwoofer support.

Power Interface

Connects the DC power adapter (up to 24V).

Operation Steps

Specifications

Frequently Asked Questions

Troubleshooting Common Issues

Important Warnings