Question:

Grid cover differences between AKG K601, K701, Q701, K612, K712, K702 and K702 65th Anniversary Edition, K7XX Black and Red Limited Editions. Are these all the same?

Answer:

1. Studio Reference headphones AKG K601, K701and K612 have the same bayonet lock Chrome Galvanic color grid cover on both sides, the part number is 2458Z51020. It has no patterns or markings, just a simple grid.
   
2. AKG K702 has the same size, shape and lock, but the color is Chrome Matte.
   The part number is 2458Z51040 for both sides.
   

Grids with markings?

3. The AKG K712 Pro and the K702 65^th Anniversary Edition have their number on the grille. The K712 Pro has an orange edge, the K702 65^th Anniversary Edition has a blue edge. Because the number is closer to the front on both sides, the grilles has left and right versions.
   Part numbers are 2458M97080 and 2458M97090 for left and right of the K712 Pro, and 2458M97070 and 2458M97060 for left and right of the K702 65^th Anniversary Edition.
   
4. The AKG K7XX Limited Edition headphones also has color variants.
   Part numbers are 5049040 and 5049041 for left and right of the Black Edition, 5065866 and 5065867 for left and right of the Red Edition.
   
5. All the Q701 variants (Black, Green, White) have the same black grid (2458Z51060) on both sides, with the “Q" logo in the middle (2458Z73030), as a reference for Quincy Jones.