AMPEG SCP-OCT �SUB-BLASTER� INSTRUCTIONS The AMPEG Scrambler Series SUB-BLASTER octave divider is easy to use, accurate and quick in its tracking, and very musical. This unique octave divider is an analog circuit upgraded from the one used in the popular SVT-5 Pro amplifier head. The SUB-BLASTER features a rugged die-cast metal housing for rock-solid durability. This design is based on the original Ampeg Scrambler overdrive pedal from 1969 and is very road worthy.