Whether it’s a red Solo cup, a plastic mail bag, an acoustic guitar, or a custom-built wooden phone amplifier, all of these passive acoustic radiators—as they’re most accurately described ...

If you are looking for something a little special to dock your iPhone and play music, then this fantastic ceramic MegaPhone passive amplifier might be worth a look. Each one is handmade and has ...

We haven’t heard of anyone making a tin can phone amplifier, but the strictly passive route wasn’t working, so an op-amp does some messy boosting. The link and video demonstrate the parts and ...

The horn, which is the focal point of the design, is meticulously hand-crafted to ensure that it not only looks stunning but also functions effectively as an acoustic amplifier. The choice of ...

The best way to do this is to design and build a passive speaker for your phone. A passive speaker is an amplifier that magnifies the sound of your phone’s inbuilt speaker using the properties of ...

If you want to use your passive bookshelf speakers into computer speakers, you need this 12-year-old amplifier. There’s nothing else like it. One idea I had was to turn them into a set of badass ...