I recently built a new set of Micro bookshelf speakers. My goal was to make something budget friendly and simple for beginners. SO I looked around for parts for a budget speaker. Here is what I came up with. I used the Dayton PC83-4 as minds and the Dayton ND20-4 for tweeters. The crossover is a simplistic 1st order crossover with a BSC circuit and a resistor on the tweeter. All in all the total cost of the build should be around $60 for the components. I am personally really happy with the sound. Check out the video for a quick build tutorial and sound test.
I really liked the mid. Just a nice clean look to it,
The Sub was downfiring to help with the looks and with small kids and animals.
The tweeter can be wired in either polarity. If you wire it reverse polarity you will get a flatter response. If you wire it normal polarity (as shown) you will get a small dip in the midrange, which some find pleasing. My advice would be to test it both ways and let your ears decide which you like better.
The speakers will be made out of 1/2″ MDF with the final dimensions of the speakers Should be 5″ Wide, 5″ Deep and 7″ Tall. The subwoofer will be a 12x12x16 You can cut these any way to get those final dimensions out of 1/2″ stock, but here is a sample cut list: