sansui ra 500

I have an old Sansui reverb amp, I think it is an RA 500. acid 500 mg It's just been sitting in my attic, I remember when i got it I hooked it up and ran a mic through it played around and i don't think I have touched it in 15 years. pinjaman dana 500 ribu My question- what was the point of this thing, that is, what was it's