Fosi Audio BT30E Channel Bluetooth Amplifier User Manual
- June 6, 2024
- Fosi Audio
Table of Contents
Thank you very much for choosing our products! Please read this manual carefully before using the product.
Front & Back panel interface function description ：
① ………………………… AUX working light
② ………………………… Bluetooth working light
③ ………………………… U disk working indicator light
④ ………………………… USB interface
⑤ ………………………… IR
⑥ ………………………… Bass cut-off frequency adjustment knob
⑦ ………………………… Bass volume adjustment knob (increase clockwise, decrease
counterclockwise)
⑧ ………………………… Left and right channel bass frequency adjustment knob
⑨ ………………………… High pitch frequency control knob for left and right channel
⑩ ………………………… Switch/input channel switch/volume adjustment knob (press the
button to turn on, press the button to switch the channel when working, press
the button to turn off for 3 seconds, rotate the volume clockwise to increase,
rotate the volume counterclockwise to decrease)
11 ………………………… Bluetooth antenna interface
12 ………………………… Audio source input interface (such as CD, DAC decoder, mobile
phone, TV, etc., right channel input in red, left channel input in white)
13 ………………………… Low pass output (connected to active subwoofer)
14 ………………………… Speaker interface (red to the positive pole, black to the
negative pole, R to the right speaker, L to the left speaker, SUB to
subwoofer)
15 ………………………… Power interface(DC power shall not exceed 24V)
Operation Steps:
- Make sure the VOL button is to the minimum.
- Connect the speakers according to the rear panel interface, pay attention to distinguish between positive and negative.
- Connect the sound source that needs to be used(Optional RCA/Bluetooth, U disk ）
- If the current playback state, inserting into a U-disk will automatically jump to the U-disk mode.
- connect the power adapter.
- turn on the power and switch to the current input audio source.
- USB working indicator will flash continuously when the volume is at maximum
Functions of remote control buttons:
① ………………………… Standby
② ………………………… Enter the channel selection key
③ ………………………… mute
④ ………………………… Play/pause
⑤ ………………………… PREV
⑥ ………………………… NEXT
⑦ ………………………… VOL-
⑧ ………………………… VOL+
⑨ ………………………… number keys area
⑩ ………………………… The mode1-mode3 reserved key for a function, this product has no
function
Specifications:
| Maxpower output | 50W*2+100W 4Ω load | THD | 1W 0.05% |
|---|---|---|---|
| Speaker matching impedance | 4-8 Ω | SNR | ≥98dB |
| Working voltage | 12-24V | Bare metal size | L133W128H36mm |
| Input sensitivity | 0.775V | Total Weight | 0.7kg |
Bass cutoff frequency range
adjustment| 40-300Hz| Package Dimension| L240W210H60mm
Frequency response| 20Hz-20kHz(±3dB)| Support music format| MP3，
WMA,APE,FLAC,WAV
Frequently Asked Questions:
Q: All the cables are connected, but no sound output?
- A: Check the POWER indicator is on, press the POWER button if the light is still off, At this point, you can find another same output voltage power supply (must 12-24V) to check if the power supply failure. If the POWER indicator light is on, check whether the corresponding input signal is selected correctly.
- If the indicator light is on, check whether the VOL knob is in the minimum position. If so, turn clockwise to normal Volume.
- If both of the above are normal, check the input device if it is paused, mute, or the volume is minimized.
Q：Why does the voice break?
A： the machine has an internal amplifier that amplifies the front stage, If
both the sound source and the amplifier are set to the maximum volume
output,it is easy to distort.
Q: Why do loudspeakers make a lot of electric noise?
A: if you are not using the original factory standard power supply, please
replace the power supply before testing. Many power supplies in the market
have a large interference coefficient, which will cause a lot of current
sounds.
Q: Why is the speaker noisy when I plug in the input cable but no sound source
is connected?
A: If an unshielded signal line is used, an interfering signal will enter the
power amplifier.
If you hate this sound, it is recommended that you use a shielded signal cable
or unplug the signal cable.
Q: Why does the amplifier stop working after a period of time? After a period
of time off, it was working again
A: Normally, in this case, the amplifier is overheating protected, and the
output power may have exceeded the designed power, so you can lower the volume
a little and then try again.
Q: Why does the volume of the machine stay the same, while the sound of
different audio sources (such as CDS and mobile phones) is different?
A: Different types of audio equipment have different output frequency ranges.
The mobile phone is usually 0.35mV and the CD is 1V. The signal output
frequency of the sound source will directly affect the volume.
Warning:
- Please do not open the shell without permission. Improper operation may cause the danger of electric shock.
- Please use the power supply of the regular manufacturer, otherwise, it will damage the machine.
- Please do not use the machine in a high temperature and humidity environment.