We found the MX-5 NC to be a noisy place to be on a track day, especially with the top down and got fed up of shouting at each other when we are on track days. I decided to try a Zero Noise full face intercom system to see if we could make communication easier.
We put together a rough installation to test the concept at Thruxton Circuit and found it worked really well but the original location (behind the seat headrests) was inconvenient and the new location seems much more convenient especially if a seat upgrade takes place.
Whilst the unit can be powered by a 9v battery this one has been hard wired to a fuse box, and the wires are routed behind the plastics with automotive connectors so that the plastics can be removed in the future without having to cut the intercom cables.
The jacks are located where the two speakers used to sit between the seats on the roll bar which had been removed when the radio was upgraded and provided an easily accessible installation point and is convenient for the helmet cable.
We cut the jack plug off the amplifier cables and bought some surface mounted jack plugs for this installation.
All in all this seems to be a worthwhile upgrade for an MX-5 track day car.
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