Graph Tech GTR834 Ratio Locking Machine Heads for Electric/Acoustic Guitar (3-A-Side) Jack Sockets including many parts that are

including many parts that are custom-built specifically for DiMarzio

Aside from that this beauty is all original

the JB-450 was the not-so-Jazz Jazz Bass copy that shared many similarities with it's Fender counterpart

sparkling highs with outstanding vertical projection

the Super Crush 100 Combo takes this now-classic recipe and goes a step further in the search for valve-like tone

Graph Tech GTR834 Ratio Locking Machine Heads for Electric/Acoustic Guitar (3-A-Side) Jack Sockets including many parts that areRATIO patented gear technology RATIO Calibrated Machine Heads incorporate different string gauges into the tuning equation. From Low E to High E 39: 1, 24: 1, 20: 1, 35: 1, 20: 1, 12: 1. We balanced the gear ratios to each string simplifying the tuning process. With RATIO, a half turn is a semi tone! Every string reacts the same to any tuning adjustment. Predictable, precise tuning, on every string. The PRL 8311, 8322, 8331, 8341, and 8351 are right