The K7 guitars were originally available in two finishes, Firespeak Blue (James "Munky" Shaffer's model), and Blade Gray (Brian "Head" Welch's model). They came factory tuned to KoRn signature tuning: A, D, G, C, F, A, D (low to high), and were retailed at USD $1,799. These guitars are characterized by the deep metallic sound, from the body being made of mahogany that is well suited for Korn's musical style. The last year of production on these particular models was 2006.
In 2007 Ibanez released new versions of Korn's signature series as the Apex. There are two models linked to Munky only, however K7's can still be seen played by Munky in live performances.
Although 7 string guitars were not used for recording his debut album Save Me from Myself Welch has continued using his original K7's as his exclusive signature guitar, even during his almost eight year absence from Korn. Head recorded a new video (Brian "Head" Welch - Paralyzed. Single 2011), in the video he can be seen playing an Ibanez K7 "Firespeak Blue".