1989: Joe Grado introduces his Signature headphone(s) (“HP 1000”; one thousand of them were made)
1991: Grado introduces the SR100, SR200 and SR300 model headphones
1993: Grado introduces the SR125, SR225 and SR325 model headphones
1996: Grado introduces their wooden RS1 headphone
2004: Grado Professional Series PS-1