Today I helped a friend build subwoofer enclosures for his car audio system. The enclosures are built from a high density particle board and are in the form of a scalene trangluar prism, 14 by 30 by 33 inches and 14 inches high. There are two enclosures, with a 10 inch subwoofer mounted in each one. The box is a sealed cabinet design. I would have created a vented design myself but he wanted to go with the sealed design. The whole thing is located in the trunk of the car.

Here are a few pictures from the building process:

Today also happened to be one of the hottest days this summer, with temperatures in the upper nineties (Farenheit) and heat indexes into the hundreds. There hasn't been a day this hot in years, especially since the past two summers barely had any days above eighty degrees. My digital thermometer said that it was 100.6°F at one point, by I believe the reading was raised a bit due to the fact that we were working by a paved driveway, which was absorbing and emitting massive amounts of solar energy. I did not check my UPS voltages to see how low they got today, since air conditioning load (or should I say refrigeration load for those people who keep their air conditoners at 60 some degrees! In my opinion, you're just wasting fossil fuels when you do that..) was probably at an all time high.