ZM-1P Impedance Meter with Protection Relay

We just finished installing a 70 volt audio distribution system in a 250,000 square foot warehouse and the ZM-1P was invaluable in this installation. It allowed us to confirm the total wattage of the connected speakers on each zone as we completed them and the tone generator although not amplified was able to drive the speakers with enough signal level to confirm their operation. I would highly recommend the ZM-1P to anyone installing constant voltage audio distribution system.s

I love it!

This is a must tool if you work on paging systems, we take care of 192 grocery stores and in 10 min. I can have this setup and tell you if there is a short or if you have a bad amp. Well worth the investment.

I install 70 Volt Paging systems in city buildings. This is a great tool to check loading and check for shorts, use it for troubleshooting all the time. We also use it to test whether existing systems are on 70 or 25 Volt systems. Easy to use, It will give you a total speaker load readout in watts without having to convert impedance , ohms.... It will put out a tone to check speaker audio too. A must have for paging system installers.