As a retired engineering manager, the last thing I wanted to hear from one of my guys was "Interesting" or "funny" when we were in the lab. It usually meant we had a serious issue that had us headed to a product delay. Thanks for the video and i will need to get a couple of the 4556 to try out.

Thank you.

Have you heard of a company called "APED" that sold power components? I can't APEX now. They sold op amps that would put out 10's of Amps!!! I do have one of their fairly cheap PA26 dual op amp that, IIRC, can put out at least couple of amps. They even made some for driving high-current reversible motors.

The NJM5532 does specify max output current when shorted; 32mA

GREAT video!! Just after watching it, I ordered a few 4556 op amps. When you put a 100 ohm resistor across 10v, that's 1 WATT of power dissipation, which means use a 5 W resistor (which will still get hot). BTW: are you swapping op amps with power ON?

I don't understand the usage of the hi current opamps. Usually there are some driving transisto'rs in power circuits which opamps can offset the gains. I've heard about some power opamps which can drive a few amps. In 80s, there were a bunch of audio amps which looked like power opamps.

This amplifier is interesting because it has zero output resistance, high output current and low price. This makes it ideal for building a simple but high-quality inexpensive headphone amplifier. However, it is already old and does not seem to be released. Are there now modern similar operational amplifiers "cheap, with zero output impedance and high output current"?

I need more current for diy ribbon headphone? please give me your recommend

what was the frequency you used? I could not see it.