Understanding the Basics: What is a 70V Speaker System? Before we dive into the wiring, it's crucial to understand what makes a 70-volt system different from the 8-ohm speakers you have in your home theater. Think of it like electrical power distribution. A 70V system uses a step-up transformer at the amplifier and a step-down transformer at each speaker.. Mastering 70v speaker wiring is easy guide. Learn to daisy chain commercial audio systems like a pro. We cover transformer taps & wire gauges.
Transformer color codes are shown in the table to the right and in the diagram below 70V amplifier connection example shown below provides 0.5W of power (load) for each speaker Unused transformer wires must be insulated from each other, the enclosure and ground Speakers on the same amplifier line can be connected at different tap (power) levels. This 70v speaker wiring diagram shows you how to wire a 70v speaker system as well as speaker volume control wiring for your commercial ceiling speaker system installation. Wiring a 70v speaker system, especially ceiling speaker and volume control wiring, can be complicated if you're not exactly sure what you're doing.