kentb Posted February 13, 2009 Share Posted February 13, 2009 so im gonna get this one http://cgi.ebay.com/Lexus-IS300-Radio-Inst...5QQcmdZViewItem for the install kit and a double din Pioneer AVH-P4000DVD http://www.crutchfield.com/p_130AVHP400/Pi...tures_and_specs is there a wiring harness or do i need to splice into the factory wires? i want to keep everything stock(amp and speakers), and just change the headunit. i tried searching but i can't find any info about this thanks! Quote Link to comment Share on other sites More sharing options...
smooth1 Posted February 14, 2009 Share Posted February 14, 2009 You won't be able to use the stock amp. Your going to have to run new wires from the speakers directly to the head and bypass the amp, or get a new amp. The amp has a 12v switch. I've only seen 2v and 4v switches on most aftermarket preamps. And be careful with running directly to the stock speakers, as thier only 2 ohm impedence, and most aftermarket is 4 ohm also. You can do it, just be a bit more careful as you can blow the speakers alot easier. Quote Link to comment Share on other sites More sharing options...
smooth1 Posted February 14, 2009 Share Posted February 14, 2009 Also, whatever you do, use painters masking tape on the side edges of the center console dash first. That plack plastic is like a rubberized coating and it scratches really easy. Quote Link to comment Share on other sites More sharing options...
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