I just recently had my kenwood kvt715 indash dvd player removed from my old car. I am now driving a 2005 toyota 4runner with the JBL premium sound system. I called and made an appt to have the kvt715 installed in my new 4runner, and came across problems. The installers informed me that the 4runner JBL system has an auxillary amp, and that the speakers are rated for 4 ohms. He also said the the kvt715, along with all other aftermarket head units runs around 1 or 2 ohms. He explained that the only way to install this head unit, or any for that matter, would be to buy an entirely new 4 channel amp and all new door speakers, or else you wouldnt even be able to hear the sound. Does this sound like the only way around this problem? I cant imagine that this would be the only way to resolve the problem, seeing as this would cost over 1500$. Thanks for the help.