The INTEGRA III SYSTEM 2000-600 Series Audio Mixer modules are designed for professional audio applications. These units are intended for high reliability, 24/7 installations. There are four audio mixer modules. The only choices to be made are number of inputs (2 to 5 per module) required. Model numbers with 2 to 4 inputs may be linked. The link feature allows the units to be connected together to provide additional inputs to one output section. The 2000-600 Series Mixer Modules are designed to be used with Models 2000 and 2000-C Automatic Mixing Systems. By offering different models, the system designer can choose a unit that will fit the application perfectly. This will result in a more cost effective design. Also, the mixer modules can be mixed and matched with other INTEGRA III SYSTEM cards, such as distribution amplifiers, within the same card frame. The input sections are bridging (10K ohm) balanced, transformer-isolated. The gain of each input section is adjustable via a trimpot.