TOA Electronics 1000 Series Input/Output Connections, Installation Precautions, Ground Loops

Input/Output Connections

Input terminal from mixer, etc.

E-1231

Input terminal from mixer, etc.

E-1231

Power Amplifier

Speaker System

Installation Precautions

Ground Loops

In any audio system, there are numerous ways by which ground loops can be created. For example, they may occur when the E-1231 is mounted in a rack cabinet, or through AC ground when the E-1231 connected with preamps, mixers, etc. These ground loops may cause hum and noise if care is not taken during connection. An increase in noise from ground loops may be minimized by breaking the ground loop. Generally, the chassis ground of the signal line should be broken as shown below.

When hum is generated from a ground loop, detach a short piece from the ground screw terminal.

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