Saturday, 8 December 2012



Thursday, 29 November 2012

Do it Yourself Tower Speakers- Complete Build

Simple steps to make your own 3 way tower speakers

The Design: First of all decide how you want your speakers to look like. Search for Tower speakers on Google images and you can see a lot of speaker units. Identify the one you feel you can make.


Choosing Speakers: The most important part is choosing the speakers or the drivers. I have chosen two 8"woofers and one 4" woofer ( instead of a speaker since the speaker which i had was not of good quality and the sound was too much ) and 1 tweeter. You can choose any speaker or woofer provided you know the output of your amplifier. For example if your amplifier gives an output of 200 watts then you need a speaker which can handle a little more than 200 watts.
4"woofers instead of speakers

 The Box/Cabinet:The speaker box or cabinet design brings out the best in your drivers. 70% of the sound quality that you get is because of the box. I used an old computer table made of MDF. It was destroyed when relocating. I made the rectangular box with basic measurements and joined all the sides except the front panel. The inner edges i sealed with M seal so that its air tight. You can also use wood sealant paste. The front panel i got it cut based on the dimensions of the drivers.

  Partitions: The inner partitions are pieces made of the same MDF and  I arranged it in such a way that the air passes through one chamber and comes out through the other and finally through the port. I used a PVC pipe for the port.

The partitions are fixed as shown in the image and again the edges are sealed to prevent air leakage. You don't fix the front panel yet as you need to dampen the inner sides of the speaker wall for better sound effect. For this i used an old carpet and stuck it all around the inner side of the speaker and used glass wool for the rear side of the speaker wall.

After Dampning
 Next you need to fix the cross over network. The cross over network is very important in any speaker cabinet. Sound waves which come out of an amplifier are in 3 frequencies1. High Range 2. Mid range and 3. Low Range. The high range gives you the shrill noises like bell ringing etc, the mid range gives you the voice like people singing and talking and the low range gives you the bass. If you connect a speaker or a woofer directly to an amplifier without a cross over network it is going to play all the frequencies together and you will not get a clear precise sound output, so the cross over network is very essential in any speaker design.

CrossOver NetworkBelow is the image of a cross over network. You can get a cross over-network from your local market. You can get very good CO networks but i have used a very basic one.

CO network rear
CO Network Front
 Coming to the connection of the cross over network you will find 5 leads on the board as follows.

1. IN- you connect the positive line from your amplifier to the IN of the board. ( The positive is marked with red color)
2. COM- you connect the negative or the black lead coming from your amplifier to the COM of the cross over network.
3. W- Stands for woofer, you connect the positive of your woofer to the W of the board and the negative of your woofer goes to the COM on the board.
4. M- you connect the positive of your mid range speaker/woofer to the COM of the board and the negative to the COM of the board.
5. T- stands for tweeter, you connect the positive of your tweeter to the T on the board and the negative goes to the COM on the board.

Line in Port
CO network fixing
Once you know how the above connections are to be done, fix the CO network board at the rear side as shown with a wire leading out of the box to the rear side. To this wire fix the speaker lead ( you can get it from your nearby electric store ) and attach the same at the back side of the cabinet. Once done fix the front panel of the cabinet to the box and seal it from all sides with wood sealant.

Vinly Wrapping: Wrap the whole cabinet with vinyl and let it dry. I used rubber solution to stick the vinyl to the box. Once dried, take a blade and cut the driver holes. Now you are ready to connect the speaker/woofer to the CO network. Connect the drivers to the crossover network and screw the drivers to the cabinet. After that attach the port pipe to the port hole. Finally screw four stands/bush to the bottom of the cabinet ( i used table bush ). Your custom speaker is ready and complete. Enjoy!

                                         Bass Test on the Speakers- Video