PS1 = cheapest or among the most cheap devices to play Audio CD's.

PS2 = the same, but with DVD movies.

There were pretty cheap audio CD players around when the PSX was current. You might be right for the DVD.

Players, it depends. A good music set (not a cheap radiocassete) with speakers and such was around a 1/3 of the salary of an average worker in Spain.

Well, a PSX doesn't have any speakers on its own.