To get best sound what are the lengths of the sides to be cut at for partical board for subwoofers

Picture frames are very easy to make, but many people make the same very basic mistake that will ruin your frame. It is very important that you follow the carpenters rule of measure twice and cut once. If you don't cut the sides of the frame to be the same length, and you cut the angles of the corners slightly off then when you put it together the final corner won't line up.

The things that you are going to need is a miter saw, some clamps, a backer board and a drafting squares to make sure you have the right angle.

To set up take your backer board and cut off a piece that's around 4 inches to be used as a sliding marker gauge. After cutting it off attach a small piece of wood to keep the slider from shifting around.

With the saw unplugged and turned off clamp the backer board to the back of the saw. To cut the corners of the a frame you need to set the saw to a 45 degree angle. Make sure to check the angle using a drafting square align one side with the backer board and bring down the saw blade align them to make sure its a 45 degree angle. When you think that its right grab yourself a piece of scrap wood and make an initial cut. After cutting the test measure the angle to make sure that it is the right angle.

When you are ready to cut the frame itself take the four pieces of the frame and make an initial cut. Once all the boards have been cut once take your slider marker to the length that you want the sides of the frame to be and clamp it in. Take the first two sides and one at a time line it up with the backer board with the angle on the outside and the cut point against the slider. Turn on the saw and cut the other end. Repeat these steps to cut the other three sides.

After all the sides have been cut use a 90 degree angle to align the corners of the frame. Lay out all the sides of the frame and line them up as tight as you can. To connect them you can use a staple gun to staple the corners together. If you were aligning it and pushing the sides together when you stapled the corners you should have perfectly aligned corners.

Now all that's left is to sand it down and get the inside ready for a picture and stain it if you want.