Toyota Lexus Scion Factory OEM Radio Plug & Play 4 Channel 400 Watt Add an Amp

Toyota Lexus Scion Factory OEM Radio Plug & Play 4 Channel 400 Watt compatible with Toyota Scion Lex Want to add a boost to your interior speakers? Want to keep your factory original OEM stereo? Don’t want or know how cut into your wiring? Take the guesswork out of the installation with this plug and play wire harness!  Installation is as easy as 1, 2, 3! Remove your OEM factory radio Unplug the OEM factory wiring and plug in this wire harness Reinstall your OEM factory radio What is it? This wire harness integrates a 4 channel amp that adds 45 watts RMS to your speakers.  No additional wires to run or connections to be made!  Best of all, you don't have to know how to "tune" an amp!  All your EQ settings are handled by your radio, and this power pack just amplifies them.  There is an adjustment that lets you fine tune your system by letting you pick the type of signal you want to reach your interior speakers:  Low(LPF), High(HPF), or full signal(OFF, what we recommend.)