The SBS-05DC DIN sized center channel speaker is not a prototype. It is a currently available model priced at about $150. You can go to any Alpine dealer and order it if they do not have it in stock. They began shipping about a month ago and are currently in Alpine's inventory. I can give anyone a list of dealers in the Central Valley/Sac area that carry this model in stock.
I would highly recommend that you step up to 5.1 in the car. It will take you to a new level. It does take a few more $$$ to commit to your system, but once you experience "Beyond Stereo" in the car, you'll never go back! And it's not just for movies either. Remember, DVD-Audio discs also have a Dolby Digital track that is compatible w/ every DVD player ever made. I just love listening to Dave Mathews and Blue Man Group in 5.1. Words can't describe the experience and realism a good multi-channel system brings to music...especially in the car!!!
I would highly recommend that you step up to 5.1 in the car. It will take you to a new level. It does take a few more $$$ to commit to your system, but once you experience "Beyond Stereo" in the car, you'll never go back! And it's not just for movies either. Remember, DVD-Audio discs also have a Dolby Digital track that is compatible w/ every DVD player ever made. I just love listening to Dave Mathews and Blue Man Group in 5.1. Words can't describe the experience and realism a good multi-channel system brings to music...especially in the car!!!