High-precision Single supply low p filter board subwoofer preamp board 2.1

10-24V subwoofer preamp board front finished board subwoofer preamp board single power low pa filter board Product Name: Single Power Low Pa Filter Board, Subwoofer Front Board

Special reminder: This board is a heavy ba preamp board. It will not sound when directly connected to the speaker. It must be connected to a pure final stage power amplifier board to make an active subwoofer. The power of the pure final stage power amplifier board is shocked according to individual needs. The degree of selection, the higher the power of the pure final stage power amplifier, the more shocking the ba effect. The so-called low-pa filter board filters out the high-pitched parts above the human voice, and retains the low-frequency part to zoom in to improve the ba playback strength, and does not hear human voices and high-frequency instrument sounds during playback. Buyers must understand this knowledge to avoid using it and not knowing how to use it. Most of the subwoofers in the market are basically dual-powered. It is not very convenient for the majority of DIY enthusiasts to use. After all, the single power supply is easier to find. Under the premise of ensuring the effect, we have introduced a single-supply super ba. The board can be used to share a set of power supplies with the power amplifier board. The DIY is very convenient. The board features: 1. All components are selected as the new first-cla products. The frequency adjustment capacitors are made of the Phils CBB capacitors. The adjustment potentiometers are made of fully sealed type. The input and output terminals are made of pure copper terminals. The wiring is very convenient. 2. The op amp is selected from NE5532. The IC seat can be soldered at any time to change the op amp, and the effect brought by different op amps can be improved. 3, designed with LED indicators to monitor the power status in real time. 4. The design of the board is simple and beautiful, and the wiring is reasonable, which makes the board have a very high signal-to-noise ratio and strong anti-interference ability. There is almost no noise near the horn when there is no signal input. The main parameters: Power supply voltage: DC10-24V single power supply DC Frequency range: 22Hz-300Hz Audio input: mono or dual channel Audio output: mono specification: 78x32mm, thickne: 1.6mm material: super hardne FR-4 fibergla board Finished board net weight: 30g Plate fixing hole center spacing: 70x24mm, hole diameter: 3.2mm Potentiometer shaft center distance: 32.5mm

Shping list: 1 x low-pa plate, color plastic potentiometer cap 2

Note: Because the production cycle is different, the following pictures are shped ly

About shping
Shping and Packaging All it will be double checked and well packed before sending.It will be dispatched within 2 business days after buyers pay for the order. It usually takes about 14 to 18 working days for delivering the package to the destination(for e areas,it may take a little longer). 

Special Announcement:
Please fill in the correct and detailed consignee, address and phone number in the order. For fast and correct delivery.If you do not receive order within 30 working days,please feel free to contact Customer Service before leaving Negative and Neutral Feedback, we will do our best to help you resoe the problem.TaxNo, you will only pay what is quoted as total cost at checkout, no more. You are not expected to pay any additional duties or taxes. If you are asked by Customs or our logistic partner to pay duties, please contact our Customer Service .

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If the product is not on good condition, You can return this product within 14 working days, please contact customer service center before returning.FeedbackYour satisfaction is our first priorityIf you receive the order and it is in good condition,we would be grateful if you would leave us 5 star Positive Feedback for the transaction.