Just put a car stereo in a box with a 12v battery and set of components with the cross over... done.. this one is fancy, has a light, a remote, voltmeter, and it will hold a few tools... Probably loud too..
Detailed guide to the Best Studio Monitor Subwoofers. Includes advice on how to select and integrate the best subwoofer for your current monitoring setup.
Lamborghini Ferruccio by Levon
revestimientos steel f.
An Austrian manufacturer of prefabricated houses, Wolf Haus, designs walls that include service cavities.
The 10 Best Studio Monitors for Home Recording http://ehomerecordingstudio.com/best-studio-monitors/