choosing a subwoofer
This box should give incredible amounts of output when it is combined with the 12dB/octave boost provided by most automobiles. If you are installing full-range speakers, reverse your steps and reattach the door panel, and be done. Once you have narrowed down your choices to a couple of different speakers, try them out for a while. Formulas - How to Calculate Internal Box Volume Area (triangle) = 1/2 Length x Width Area (circle) = 3. Place a drop cloth over any dash, console or front seats that you want to protect from debris. I've always found that it's easier to work on the wood once the box is already put together.

car subwoofer faq
If we connect (2) four ohm speakers (R1 and R2) in series to an amplifier the total resistance will be:The fact is that installing car stereo equipment is not much fun. 785 x Diameter x Diameter When you are making more than one driver enclosure, you'll get the best results when you isolate each driver in a separate chamber. There is no other way that you can really know how the speakers will sound to you.