This circuit is from Fig. 20.3 in Douglas Self, Small Signal Audio Design, Third Edition, Routlege, 2020.
This is a headphone amplifier, and as such, both input and output signals are alternating current. Because the TL072 can't drive large loads, the design includes a very simple Class-AB amplifier.
My question concerns the capacitors C1 and C2. I have very carefully copied them from the figure in the book, and they are very clearly drawn as polarised capacitors. Now I read, in books, and also as answers to questions on this very site, that you should not put AC across polarised capacitors. On the other hand, Mr Self is not some random dude with a YouTube channel. He really knows what he's doing and so I doubt that he made a simple mistake. So my question is, what is going on here? Can I use polarised caps in this design safely? And if yes, does the polarity really matter, given that the voltages across them will not be polarised in one particular direction for very long?
And if I can not use polarised caps safely, what should I use instead, given the rather large value especially of C2?