Unknown Custom Amp Head Flight CaseNotes Interior dimensions: 31" wide, 24. 75' tall, and 16" deep. Small rack inside to hold rack accessories like tuners and power conditioners Lower compartment fits amp head and has removable foam to custom fit your particular head. A Unknown Custom Amp Head Flight Case in Very Good condition! At Evolution Music, we attempt to highlight cosmetic defects (if any) by picturing every angle of every piece of gear so you know exactly what you are getting.