Check the finished amp

Short the input. Apply voltage and check the output voltage. Measure the DC voltage at the output. It should be the specified offset voltage, a couple of millivolts.

Measure the quiescent current.

Connect a signal source to the input, either music or from a signal generator. The reproduction should be flawless using headphones or oscillscope. If headphones is to be used, insert to begin with 1 kohm in series just for protection

The whole buffer is ready.

Good luck and happy listening.

Feel free to post pictures and reviews if you want. I don't mind to publish this on facebook and instagram. Send the material to me first though.