Back in 2011, Elektor presented a DIY Ultrasonic Directive Speaker using an array of piezo ultrasonic transducers (up to 200) ...

There is something refreshing about a neat, portable audio hack – especially one than involves making a DIY Speaker Box from scratch. [Dave] had some time to spare and his ShapeOko was lying ...

DIY Bluetooth speaker projects are always a staple here at Hackady. In our latest feature of DIY audio builds, we have [Patrick’s] vinyl cylindrical speaker. He found a pretty inexpensive ...