DIY Down Firing Port Active Subwoofer

by Steve Willson Kujur in Circuits > Speakers

6779 Views, 22 Favorites, 0 Comments

DIY Down Firing Port Active Subwoofer

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Hey! everyone My name is Steve

Today I’m Gonna show how I Build this 12” Active Subwoofer with Down Firing Port using a 280 Watt Class D plate amplifier

I’ve tuned the Enclosure to 35Hz, The bass I get is very strong and there is no port noise The Amplifier is Great No heating issue

Click Here to See The Video

Let's Start

Features

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Input Power

  • 110 - 220V AC

Output Power

  • 280Watt RMS @ 4Ohms

Impedance

  • 4 Ohms

Frequency Response

  • 20Hz - 200Hz

Built-in Protection

  • Over Load Protection
  • Short Circuit Protection
  • Over Heat Protection

Thing I've Used

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Banggood

Amazon

Aliexpress

Note - Please see the images for better understanding

Sponsor

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Cutting

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I used 18mm MDF and used my Table saw Bosch GTS10J to cut it

Dimensions

  • 59 x 35.5 cm 2 Pieces up and down Panel
  • 59 x 35.5 cm 2 Pieces Side Panel
  • 39 x 35.5 cm 2 Pieces Front & Back Panel
  • 32 x 35.5 cm 1 piece middle panel


Note - Please see the images for better understanding

Assembly

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I used wood glue and corner clamp to hold it

Note - Please see the images for better understanding

Chamber

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I used a piece of wood to divide 2 chambers one for amplifier and one for subwoofer

I've installed it 2" deep from the back and used Nails to hold it and then I used wood glue to seal it


Note - Please see the images for better understanding

Front Panel Assembly

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I used wood glue and nails to hold it

Note - Please see the images for better understanding

Back Panel Assembly

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I used a Jig Saw to cut mounting for the plate amplifier and then used wood glue and nails to hold it

Note - Please see the images for better understanding

Finishing

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I used wood filler to fill all the imperfections and then used a sander to finish it up and then used a Round Over bit to round the edges

Note - Please see the images for better understanding

Circle Cutting

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I used a circle cutting jig to cut the speaker hole and port hole

Note - Please see the images for better understanding

Panting

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I have gone with black and this is a Speaker Cabinet Paint it gives a rough texture I applied it using a paint roller

Note - Please see the images for better understanding

Matt Finish

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Matt Black looks Fantastic

Note - Please see the images for better understanding

Port

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I used a 4.3" dia and 14" Length PVC Pipe and used masking tape to make it a tight fit and then used spray paint to paint it

Note - Please see the images for better understanding

Legs

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First, I drilled 4 holes and used 1" rubber legs and then tighten it with some wood screw

Note - Please see the images for better understanding

Wiring

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I drilled a hole in the middle chamber for passing speaker wire and then used some glue to seal it

Note - Please see the images for better understanding

Subwoofer Installation

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I used a centre punch to mark and then used a drill to make holes for screw and then I used a Spoung tape to make it leak-proof and then tighten up the Subwoofer using 8 Screw

Note - Please see the images for better understanding

Amplifier Installation

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I drilled 4 holes for screw and then I plugged the speaker wire to the amplifier and then used 4 screws to tighten it up

Note - Please see the images for better understanding

Finished

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  • Plug the power wire
  • Plug the input wire
  • Adjust the controller
  • Enjoy

That's all for today guys!

Click Here to See The Video

You Just Made It

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