You can DIY! Build an Audio Dummy Load

An audio load is an essential piece of test equipment for any audio electronics workshop. Having created the very popular Heathkit ID-5252, more than 35 years ago, Gary Galo decided to design a new option for everyone to build now. The ID-5252 contains four 8Ω, 60W power resistors. The biggest limitation of the Heathkit load is power handling. Series and parallel combinations can be used to produce various resistances and power levels — up to 240W at 8Ω, using all four resistors. But, simultaneously testing both channels of a high-powered amplifier requires two ID-5252 units. Fortunately, the raw parts for building an audio load are easy to find.

Have you recently completed a project and are interested in sharing your build or product design concept with others? Consider writing an article for audioXpress magazine. We welcome new ideas on analog or digital circuits, hardware and software, wired and wireless. We also publish articles on sound theory, tubes, and vintage audio. Submit an article. Be paid for publication.

Following the introduction in 2016 of the BOSEbuild Speaker Cube, a complete kit that lets kids explore the science of sound, Bose announced its second BOSEbuild product. The BOSEbuild collection is now expanded with a set of “build-it-yourself” Bluetooth headphones. It’s a complete kit that provides kids - and anyone else - with a fun and interactive way to explore putting together a pair of high-quality headphones.