1998 Lexus LS 400 stereo upgrade

I have a customer looking to upgrade his factory stereo in his 1998 lexus LS400, however....it's been a good 5 years since I've done any audio systems in these vehicles, so i have a few questions to anyone with experience working on these vehicles. They are looking to get a new eclipse double din nav. unit and purchase a new sub with a new amp to run the sub. 1) what size factory sub is in the rear deck, 8" or 10" 2) is the entire system amplified, or just the sub? 3) if the entire speaker system is amp'd, can you interface a low-level signal from a new source unit to retain the factory amp running the interior speakers? 4) where is the factory amp located? trunk or interior? 5) what size are the factory interior speakers? Thanks in advance for anyones help!

thanks !!

what do you have to do in order to run low-level to the factory amp? going to be using an eclipse head unit with pre-outs. does metra make any type of harness, or do you have to solder rca plugs into the factory signal wires? thanks again!

either way would work...if Metra (et al) has one it should be the same as the Toyota premium sound integration harness... otherwise cutting and solder your own RCA's should work as well..... i installed a 5 channel Directed amp in that one so it wasnt an issue for me..... Kevin Gerry

Certified Electronics Technician

MECP First Class Installer

Owner/Installer

Classic Car Audio

since 1979

does anybody make a dash kit for this vehicle???? does the kit for the GS work on the LS? Im assuming im going to have to do some custom fab. to make a double din work in this vehicle?

No kit- all custom.My ex once told me I have a perfect face for radio.