Went to onlineautoparts who have a shop in Geebung. They were kind enough to plug both the truck style Stebel horn(139 kh ?) and the Nautilus into some sort of power supply.
The first thing to note is that the instructions say that the 12v model draws <18 amps - I don't know for sure that the power supply had the grunt necessary to show full potential.
However, the Nautilus produced a very loud nice sounding shriek. G'teed to wake up wayward pedestrians, and maybe even cut through Iphone wearing people's lack of attention.
The truck style job was not as loud - and as has to be expected, was not the same experience as half a meter or a meter of metal horn connected to a huge airtank. It wasn't bad, though, and compact.
The horn came with a relay in the packaging. I went mad and spent $10 on the wiring harness to suit.
Being a single mounting bolt, the increased flexibility means I'll probably be able to get the nautilus out of the engine bay and in front of the radiator where it will be more audible.
Finally, the Nautilus (and maybe the truck model, forgot to check) comes with a fitting so that the air pickup can be run to a source that is dry and clean.
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Originally Posted by taslucas
