Here are the ones that I am going to fit one day
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rear:
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Mock up in the car
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Before I removed them from the scrapper ( just below the steering wheel)
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They are made of hardboard, with some sort of black leather/vinyl on the front. They produce some good sound!!
That should give you an idea of what it will look like when fitted.
Like others have said. You are gonna need an amp, and for the price of an amp, you can get a radio.(if you don't like the modern look, the one I suggested earlier would be ideal)
Chris