In a concert a majority of the staging is set to the front yes. Generally tho there is many speakers staged around the stage as well not only in front and in back! Yes it would matter if you didn't have a rear stage the sound quality will be destroyed. The staging really creates a tonal balance. and yes I have home audio speakers in my vehicle. Many sound quality vehicles that actually win shows use home audio speakers. Its because they are designed to have less roll off on pitch ranges as well as have higher output with the same power. check out Parts-express.com they sell alot of high end car audio. They also sell home audio speakers that many true car audio enthusiast use to fill their vehicle with true tonal bliss and real sound quality.