Subwoofers, mid-ranges, and tweeter speakers plays at different frequencies and this is covered in the Brett files.In the workshop, the Corvette's rear skirt is under construction. The Maserati's almost ready to be painted. The '59 Cady has had work done underneath it. A Holden Commodore VT has mesh plates, side skirts, and an agressive bonnet scoop added to it. The Ford Galaxy has been assembled and painted. The 1964 Ford XM Futura has had its custom fittings added and is looking hot!The feature car this week is a Mazda 6. David shows of his gizmos in the car as well as the Focal amp and sub. The Alpine 9887 head unit is showed off along with the 7" touch screen in-car computer with a Garmin GPS.Brett presents NSayne Gear which is a new segment that aims to educate about car audio equipment. This week, Brett covers the Arc Audio KS 125.4 Mini amplifier which one the "Car Audio Electronics Amplifier of the Year".Sam talks about why they use Stinger Roadkill over any other sound-deadening product in the market.