I had a 12" alumapro and a memphis amp installed in my rx300 - very loud and solid. only problem - the installer claims he could not get rid of AC hum and could not get a good "stereo on" voltage. (the only line he could find would not deliver enough amps to switch on the amplifier)

Result - when at low volumes or off, the amp whines like a 6 month old - constantly !!! arg - very embarrasing to take someone in your lexus and hear a squealing while driving.

does anyone have similiar experience or suggestions for a turn on when stereo on - or voltage isolation ideas?

 

get a line driver,wire the amp remote to the power antenna and turn the gains down on the amp.. good luck

 

sorry, I don't know what a line driver is. they did take line level inputs from under the dash (vs off the amp).

Also, If I take the power antenna trigger, won't the amp only turn on with the radio? like no cd?

 

Line drivers Boost up the voltage signal from the head unit to the amplifier giving optimum power and effeciency.. I'll send you a PM later today to try and help you out