Summary: These speakers are great. I got them three years ago on a great discount, and I can tell that they are very good quality. I put them in the back of my 1990 Accord, and I just recently upgraded the front speakers as well with another brand. These Alpines are still better. The bass as well as the mids and highs are just awesome. I have them slightly amped (22W x4 from my Kenwood head unit), with no subwoofer.
Summary: Bought these to replace OEM door speakers on Honda Accord, along with Alpine SPS-69C3 speakers for rear shelf. Install was easy. Carefully removed interior door panel & removed OEM speaker. Only had to drill 4 1/8" holes to attach mounting spacer. Need spacer to fit in front door w/o hitting rolled-down window. Rear speakers went in much quicker, Had no problems with space between tweeter dome & interior panels.
Summary: Coupled with Alpine's SPS-69C3 in the rear, the sound in my car is quite amazing. Installation on my 94 Accord Sedan was fairly simple - just don't be afraid to apply some pressure when removing the front door panels. If you're not into trunkshaking music but quality sound at normally tolerable levels, these are a great choice for a great price.
Summary: These Alpine's are really clear and tight. They provide great balance for my new car stereo. These specs - 92 db and 32 htz - campare favorable to almost any other high-end car speakers available. After all these years, there's still only 2-3 main choices for good car speakers: Alpine, Infinity, or Polk Audio. Alpine is the best value of the bunch.
Summary: These speakers produce a clear and rich sound. They're far and away better than the factory speakers (to Toyota's credit, the factory ones lasted 10 years). Being newly installed, I've only run them for a handful of hours. I'm guessing they'll sound even better after their break-in period. In order to install these in my Toyota Celica, I needed an adapter to size these to the 8" cutout that the factory speakers were in.