How to Build a Quick, Easy and Cheap Loudspeakerbox With Drainpipe Material




About: I love to invent and create new things in a "steampunk styled way" working with brass, copper, vulcanized-fibre, brass gears and (ply)- wood. On one side I am fascinated in neon lights and small electronic ...

Hi everybody

This is a very short and universal instructable to build  an easy and cheap loudspeakerbox. It works with a simple trick and is quickly done in three steps. 
I need such boxes for my next steampunk instructable working with two old fashioned brass horns. I will post this later;-)))

Look at the  small video first how it works and then I´d like to explain the different steps with detailed pictures.

Hope you enjoy this new instructable. 
Aeon Junophor

Step 1: What Do You Need

Only three parts are neccessary for this box. First an old loudspeaker from an old pc (0,-Euros), then a HT drainpipe muffle (also called double socket) DN50 mm (about 1,50 Euros) and at least a drainpipe blind plug for DN50 mm (about 0,50 Euros). The drainpipe parts can be bouhght at every homeimprovement store.

Look at the dimensions and you will see that all parts fit perfectly together.

Step 2: Prepare the Box

To prepare the box you have to cut the muffle right in the middle. First fix the hose clamp and then cut the socket with afin saw.
Next yo have to remove the  rubber gasket. It works best with by using a screwdriver.

Step 3: Put in the Loudspeaker

To put the loudspeaker into the gasket ring of the drainpipe socket, place it into a bench vise. Press now the pipe slowly  a little bit together until the loudspeaker starts to move in. Then take the socket out of the vise. Now press the loudspeaker carefully and softly with your thumbs in. It works very easy  and you will hear a "Snap". And that is it.

Step 4: Close the Box

At last you have to replace the rubber gasket. You can do it from the front- or backside of the speaker. If you choose the frontside you can put a horn later on (eg.made of paper, plastic or metal)  and generate the effect of a real pressure chamber horn which means that the loudness will rise. It works like an amplifiying horn of a grammophone.
Now you have to drill a hole at the socket side or through the cap to put the speakerwires through. Close this hole with melting glue tight.
After this you close the loudspeakerbox by plugging the cap in and your work is finished.

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    9 Discussions


    5 years ago on Step 4

    The video doesn't show WHAT THE END PRODUCT CAN DO. What is the use? Show what it can do.

    1 reply

    Reply 5 years ago on Introduction

    Hi drvaja

    You are right.
    The horn is part of another instructable (about a new steampunk-object with e.g. brass horns......... as I already wrote at the introduction.

    Yours Aeon junophor


    5 years ago on Introduction

    I thought that you could make a tuned enclosure by leaving the pipe unplugged so that the waves come out the rear in sync with the sound waves coming out of the speakers front.

    1 reply

    Reply 5 years ago on Introduction

    Whenn you plug the open end of the pipe this cap reflects the soundwaves and they come out of the frontside too. That is why this pressure chamber combine -with a horn of the right lenghth- works as a natural amplifier.

    Yours Aeon Junophor


    5 years ago

    How did you figure out that perfect fit? can't wait to see the next half.

    1 reply

    Reply 5 years ago on Introduction

    Hi longwinters

    It just came into my mind while I was looking for a solution of this question. In one hand the speaker I was looking around what might could fit...... Then came the idea....;-))

    Greetings yours Aeon Junophor


    5 years ago on Step 4

    you can also use a method for molding pvc pipe (although it is dangerous since pvc emits harmful gases when heated) into horns. 3D printed would most likely be ideal since getting the exact shape is imperative.

    Nice job! this has been added to my to do list for my truck to replace a stock radio... I made a lil steampunk Mp3 player to replace the factory radio that did not work and my stock speakers are just terrible wonderful idea thanks for sharing.