2007 lexus is250, amps, speakers

I have a 2007 Lexus Is250 in the bay and we are trying to install 2 amps and front speakers any one have any info on this car where the factory amp is, wiring. The customer wants to keep the factory head unit. Any info will be better then none.

Thanks

you are probably going to have to use some sorta OEM integration piece. Cleansweep etc

Na go do not use the pac as that is a cheap part and will not provide the sound quality you are looking for. The only advantage to using the cleansweep or another thing like it is that the factory radio is programed to cut bass as you increase listening volume and there is no way around this. The cleansweep corrects this and creates a better signal from the factory headunit. But this is a expensive part and I guess you can do without it. Go with the soundgate loc4.4 which is designed to be connected after the factory amp or if you wanna attach the loc before the factory amp then go with the soundgate LOCB.2 which is designed for that.