Archive for November 2022

Speaker DC protection

DC signals also affect the movement of the speaker cone which may result in a reduction of audio quality, although low level DC doesn’t damage the speaker. If you were to apply more than a little DC power to speakers, this will cause the voice coil to heat up significantly, which would likely cause damage.

AV disaster: PowerCON plugged

No audio signal. Only humming. This is how 6.3 mm plug and PowerCON meet. There are XLR and Speakon combo connectors designed for things like this. But this is PowerCON connector designed to carry mains power. Read more on PowerCON at Fortunately the 6.3 mm plug here only connects to the center ground pin.

Electronica 2022

The electronica trade fair in Munich is just about to start. Electronica 2022 is the world’s leading trade fair and conference for electronics November 15–18, 2022 at Trade Fair Center Messe München Germany. After a four-year break, electronics professionals gather in Munich for the Electronica trade fair. Expectations are high for both companies and visitors.

Component cross references

Here are links to some useful electronics component cross references: SMD Cross reference Electronics component information search at