This is a toyota supra on a chassis dyno being revved to the max. It has a turbo on it and you can hear it whining. It gets extremely loud to the point of distortion, but it will be a great sound for somebody who needs an engine rev without the vehicle passing by.
In the sketchy neighborhood near the warehouse a piece of crap supertuner import hot rod, driven by a guy in a neon yellow shirt and white wraparound sunglasses, revs its engine as it passes.
This is the same sound i recorded 6 years ago, back than i had just a very crappy microphone through my cellphone. Last year i bought an ipad, and i installed hokusai audio editor. This gave me a better way to record in higher quality. Still mono though, but it has less audio artifacts. This alarm is tested once every 3 months all over the swedish towns.
