Simplest, easiest, cheapest way to sum to mono?

[John Roberts]

Re: Simplest, easiest, cheapest way to sum to mono?

I was once using some gear that could power external equipment and they told me that its psu was well protected against short circuits and such and you did not have to worry if wires was crossed or something malfunctioned with the external stuff.

It took me just a couple of minutes to release the magic smoke. They had overlooked the scenario where their -12v was crossed with +12v. 8O~8-O~:shock:

That's why I said large and "experienced" manufacturers. The inside joke is that customers evolve and learn how to circumvent protection circuits, so being customer-proof is a moving target.

Shorting + to - rail was a common fault from plugging an IC with power pins on the corners into a socket backwards. Lots of old school op amps looked like a diode short when plugged up backwards. A reverse diode across the power supply can clamp it at one diode drop negative and prevent damage, a few cents for insurance.

JR