Tube Task Chart; Specifications - Mesa/Boogie Formula Pre Owner's Manual

TUBE ASSIGNMENT
V1 - A = Lead Input
V1 - B = Rhythm Input
V2 - A = 2nd Rhythm Stage
V2 - B = Not Used
V3 - A = 2nd Lead Stage (Both Channels)
V3 - B = 3rd Rhythm Stage
V4 - A = 4th Lead Stage (Both Channels)
V4 - B = 3rd Lead Stage (Both Channels)
V5 - A = Effects Return (Right)
V5 - B = Effects Return (Left)
A = Pins 1,2,3
B = Pins 6,7,8
TUBE LAYOUT and TASKS
Formula Pre - Top View
Back Panel of Formula Pre
MESA MESA MESA MESA MESA MESA MESA MESA
12AX7A 12AX7A 12AX7A 12AX7A
V1 V2 V3 V4
ALL TUBES
12AX7A
MESA MESA
12AX7A
V5
DIMENSIONS
WEIGHT: 8 lbs
HEIGHT: 1 rack unit - 1 3/4 nches
DEPTH: 13 1/4
INPUT IMPEDANCE: 1 Meg ohm
POWER REQUIREMENTS: (from AC mains)
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SPECIFICATIONS