Inexpensive or cheap car audio equipment is fairly easy to find if you know where to look. Best Buy sells a product line called Dual that offers all the features and quality of JVC, Blaupunkt and Pioneer, yet at usually 75% of the price of the more recognizable name brands. Crutchfield, a catalog and online electronics seller, offers a wide range of cheap car audio equipment from a variety of name brand suppliers. Better yet, when you buy from Crutchfield, you get world class service as close as your phone. When you buy car audio equipment from a traditional store, they’re going to try and sell you installation and not offer installation advice or assistance. Normally, Crutchfield will even send you a diagram showing how to install your equipment.
For more info, see 5 Things to Consider Before Buying a Car Stereo Equalizer