The 1176SA from Universal Audio, is a small interface that is used to calibrate two mono 1176s for stereo operation. The 1176SA was first offered for the original 1176, but has become increasingly difficult to find for use with either vintage or new 1176s.
Universal Audio has carefully recreated the original adapter. The 1176SA rests behind the 1176s, is housed in a full metal enclosure for proper shielding, and comes with gold-plated connectors. A two-year battery is included. The unit is compatible with both new and vintage models.
Universal Audio 1176SA Specs
Interface for stereo calibration of two 1176 limiting amplifiers