Low Pass Filter 12V + 12V Subwoofer Preamplifier LPF Board

1, adjust the selected potentiometer tightly, the inputs and outputs use pure copper terminals, the wiring is very

convenient.

2, 4558 op amo selected, the soldered IC bracket can still replace the amplifier, experience different effects to

improve playability.

4, Simple and beautiful board design, reasonable wiring, making the board has a very high signal-to-noise ratio,

strong anti-interference ability. When there is no signal input near the speaker, you can almost hear noise.

Description:

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, 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, better bass effect

Adjustable phase

Potentiometer from left to right: bass volume control

The cut-off frequency: 22HZ-240HZ

BOARD size:Type I: 4.3x5cmm, Type II:4.5×6.6cm thickness: 1.6mm

Audio input: mono or two channels

Audio output: Mono (connection with amplifier)