What is 70 volt ?
70 volt systems are the number one choice for applications where you want to
install many speakers. With 70 volt there are a lot of advantages over 8-ohm
systems. One of the main advantages is the simplicity of the wiring as well as
how easy it is to match up speakers with the amplifier. For example, you can buy
one 70V amplifier with 150 watts and you can install speakers that total around
120 watts. It does not matter if it is 15 speakers that are 8 watts each or 30
speakers that are tapped at 4 watts each. You always want your 70 volt amp to
have at least 15 to 20% more power than the combined watts your speakers are
tapped at.