Description
1, adjust the selected potentiometer tightly, the inputs and outputs use pure copper terminals, and the wiring is very
convenient.
2, 4558 op amo selected, the soldered IC bracket can still replace the amplifier, and experience different effects to
improve playability.
4, Simple and beautiful board design, reasonable wiring, making the board have a very high signal-to-noise ratio
and strong anti-interference ability. When there is no signal input near the speaker, you can almost hear noise.
Remark:
This board is a preamp board, it cannot be directly connected to the speaker. It must be connected to the next
stage of an amplifier board for this preamp to work.
The so-called low pass filter to filter the human voice map is more than the triple part, the low-frequency part is
amplified to improve bass reproduction efforts, and people will not hear the sound of musical instruments and the high-frequency sound during playback. The buyer should understand knowledge of this area.
Characteristics:
Supply voltage: Dual DC 12V and 25V power supply
Ifier, can not be directly connected to the speaker
The multistage filter, a better bass effect
Adjustable phase
Potentiometer from left to right: bass volume control
The cut-off frequency: is 22HZ-240HZ
BOARD size: Type I: 4.3x5cmm, thickness: 1.6mm
Audio input: mono or two channels
Audio output: Mono (connection with amplifier)
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