Recent content by ammulu

This is the job of the amplifier. It simply produces a more powerful version of the audio signal. In this article, we'll see what amplifiers do and how they do it. Amplifiers can be very complex devices, with hundreds of tiny pieces, but you can get a clear picture of how an amplifier works by...

This is fine for most of the stages in the process -- it's strong enough for use in the recorder, for example, and it is easily transmitted through wires. But the final step in the process -- pushing the speaker cone back and forth -- is more difficult. To do this, you need to boost the audio...

The diameter of the hole for the port, in the front panel, was cut about 1/4 of an inch oversized. A wrap of 3/16 thick Weather Strip was applied to the outside of the port. The port was squeezed into the hole resulting in a snug and secure fit. I bought three pairs of ports that could be...

Making a removable bottom was reasonably simple. I cut eight smaller blocks approximately two inches square. Four of the blocks were attached to the inside of each enclosure, along the bottom edge, centered on the front, back, and sides to provide material for a screw to penetrate. Rubber feet...

The ML TL enclosure can be thought of as a form of transmission line where quarter wavelength standing waves are used to provide the spring for the mass of air in the port. To physically model a straight uniform TL, clamp a yardstick to the edge of a counter or desk and pluck the free end so...