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Pre- Board, Stereo Audio Preamplifier  Board Low-Pass Filter Bass Tone Subwoofer DC10-24V, Perfect For DIY Work

<ul><li>The adjustment potentiometer is made of fully sealed type, and the input and output ends are made of pure copper terminals. The wiring is very convenient</li><li>The IC holder can be soldered at any time to feel the effect of different op amps and enhance the playability</li><li>Designed with LED indicators to monitor power state in real time</li><li>The board is simple and beautiful in design, and the wiring is reasonable, which makes the board have a very high to noise ratio</li></ul>

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Specification: Features: 1. The adjustment potentiometer is made of fully sealed type, and the input and output ends are made of pure copper terminals. The wiring is very convenient. 2. The IC holder can be soldered at any time to feel the effect of different op amps and enhance the playability. 3. Designed with LED indicators to monitor power state in real time. 4. The board is simple and beautiful in design, and the wiring is reasonable, which makes the board have a very high to noise ratio. 5. This board has strong anti-interference ability. There is almost no noise near the horn when there is no input. Specification: Condition: Power Supply Voltage: DC12V Single power supply DC Frequency Range: 22Hz-300Hz Audio Input: Mono or dual channel Audio Output: Mono Printed Circuit Board Standard: Approx. 78 x 32mm / 3.1 x 1.3in, Thickness: 1.6mm Printed Circuit Board Material: Super hardness FR-4 fiberglass board Plate Fixing Hole Center Spacing: 70x24mm, Hole Diameter: 3.2mm Potentiometer Shaft Center Distance: 32.5mm Weight: Approx. 32g / 1.1oz Package List: 1 x Filter Board 2 x Screw 2 x Gasket 2 x Knob Note: This board is a heavy bass preamp board. It will not sound when directly connected to the horn. It must be connected to a pure final stage power board to make an active subwoofer. The power of the pure final stage power board is selected according to the shock of individual needs. The higher the power of the pure final stage , the more shocking the bass effect will be. The so-called low-pass filter board filters out the high-pitched parts above the human voice, and retains the low-frequency part to zoom in to improve the bass playback strength, and does not hear human voices and high-frequency instrument sounds during playback.

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