2nd Production Version Big Box Rat

1981-1983

Key Features:

Filter Control - Highs are now decreased when turned clockwise also using Log Taper pot

Pro Co Sound Logo with "Sound Inc" vertically on side

Now using only Electrolytic caps for larger values.

Rat logo now using lower case "a & t"

Knobs are now what will be the standard up until mid 2000's

Distortion, Tone, & Volume labels closer to top edge of pedal than Ver. 1.

No battery door on bottom

                                         1981 Filter Rat