product：Single power low pass filter board/Subwoofer front panel

Most of the front stage boards of subwoofer are basically dual power supply，vastDIYIt's not very convenient for enthusiasts，After all, a single power supply is easier to find，On the premise of ensuring the effect，We have introduced a single power subwoofer front panel，It can share a set of power supply with the later stage power amplifier board，DIYVery convenient。

Special reminder：This board is the front stage board of subwoofer，Directly connected to the horn will not make a sound，It must be connected to the pure rear power amplifier board to make an active subwoofer to make sound，The power of the pure rear stage power amplifier board is selected according to the shock degree of personal needs，The higher the power of the pure rear power amplifier, the more shocking the bass effect will be。The so-called low-pass filter board filters out the high voice above the human voice，Amplify the low-frequency part to improve the bass playback，No human voice or high-frequency musical instruments will be heard during playback。Please be sure to understand this knowledge，To avoid not knowing how to use it after buying it。

characteristic：

supply voltage：DC9V-32VSingle source DC

1.Dual channel input，Subwoofer output，The output power amplifier cannot be directly connected to the horn

2.Multistage filtering，Better bass

3.Phase adjustment

4.Potentiometer from left to right：Frequency regulation，Bass volume adjustment

5.cut-off frequency:22HZ-240HZ

6.Center distance of potentiometer shaft：3cm

7.pcbThe larger the size：62*26.5mm

Audio input：Mono or dual

About Delivery :

Normally, that afternoon18：00The goods photographed before will be delivered on the same day in time,In case of shortage or other special circumstancesWe will contact you as soon as possible.18：00in the futureOrder forDepending on the day.

Transportation instructions:

1:Our default express issto /Tactfulexpress,if needFor other express, please note or contact us.

2:The general express freight in the province is8element,Outside the province10element-20element,Depending on the province,(Our freight template has been adjusted,Just shoot it directly)If you need SF express orEMSPlease don't pay after taking pictures,Contact us to modify the good luck fee before payment!

3:Orders in the province are generallythe second dayYou can receive the goods,Orders outside the province are generally Yuantong or Shentong2-5day,SF general1-3day,EMS3-10The speed is relatively slow. We don't recommend sending it,No, I can't.

4:Express delivery time is usually in the afternoon6Around o'clock，（There is only one express delivery a day，I can't help it in a small place。）aboutWe'll send SF special urgent items，If you can't wait, please find another home，We don't take urgent mail！！！

notes：1All express are generally availableScan input delayPhenomena and causesSite distanceFar away，General day5-6Check in items will be displayed in the9-10spot，Please don't get me wrong9-10Sent at。

2Our freightIt is determined according to the charging standards of express companies，We alsoWill not earn Taoyou freight，Please don't bargain with us~~~~。

3The speed of the express company is beyond our control！！Please put yourself in your shoes，If it were you，Can you control it？If the speed is slow, please be considerate，We really can't help it!If you need, please contact us and be sure to help expedite the delivery！Evaluation questions：We cherish every praise，If you have any dissatisfaction，Please communicate with us first，I believe that any reasonable problem can be solved quickly。No communication，Give a bad comment rashly，It doesn't solve any problems。We accept the pertinent criticism with an open mind，There must be some mistakes in our work，And very willing to take responsibility for it。Something went wrong，Be calm and honest with each other，Please try to think in a different position，I believe any problem will be solved easily。We welcome this to the point、Tolerant customers，I believe we can become good friends。Individual arrogance is not welcome，Buyers who don't respect other people's labor，There are individual buyers in order to achieve their own goals，Attacking the seller maliciously and threatening with bad comments，We must also adhere to the principle of complaining to the end。