Quick Easy Speaker Amp




Create a fully functional speaker with parts from around ur house.

Step 1: Materials

For this project you need:

A Box(the larger the better)
solder and a soldering gun
an old cd that you dont plan to reuse
a head phone speaker(this project amplifies the small sound)
a head phone jack

Step 2: Cutting

Cut a hole in the box

Step 3: Taping

Tape the cd over the hole so the center hole of the cd is in the center of the box.

Step 4: Soldering (skip This Step If Cord Is Already Attatched to Speaker)

Solder the red to the left and the white to the right

Step 5: Finishing Up

finally you tape the speaker over the cd hole and plug in



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    14 Discussions

    Looks like the box is meant to be a resonace box for the speaker. It is an old old audio trick. Ever use a tuning fork? You do the same basic thing there, the fork vibrates and you touch the base to a large hollow, solid box to resonate the vibrations and increase the volume of the tone.

    Honestly, building the driver itself is 1) Fairly Difficult 2) Fairly minor to the end result. The design of the speaker enclosure is probably the most important thing to affect the sound. This is a basic, cheap enclosure that really won't sound as great as it can, but it gets the basic idea across. Building the driver itself would be expensive, time consuming, and really not worth it. Well, unless you went with a non-common driver design and even then, it may still be. So yeah, he's not telling you how to build a driver here, he's showing you how to build a basic box for an existing driver to make what in the end is a speaker. The name on the page seems correct enough on me. Labeling it as an enclosure for a speaker driver wouldn't really make it any more self explanitory.


    Reply 11 years ago on Introduction

    The problem with this is that the box is (poorly) resonant at certain frequencies. Also, headphones don't move enough air to make a megaphone (that's probably the idea here) do anything. One good thing about it, it reminds me of a project I've been planning to redo, and this time I can do it as an instructable. Stay tuned. Where's the amp mentioned in the title?


    11 years ago on Introduction

    what is the use of the taped CD? is it only to physicaly protect the membrane of the speaker?

    2 replies

    Reply 11 years ago on Introduction

    The rigid CD will transmit vibrations better than the relatively soft cardboard.


    Reply 10 years ago on Introduction

    If you've ever made a speaker from coils and magnets CDs work really well... Some science project or demo for the class to compliment the sub and ping pong balls...


    11 years ago on Introduction

    So... You build a speaker by taping a speaker to a box... Hmmm... Isn't it a "Speaker Enclosure?" The speaker's already there.