Keep your factory amplifier when changing to an aftermarket headunit.
TYTO-01 Amp rentention to suit Toyota
Description:
The tyto-01 interface is designed to allow the user to replace the OEM radio with an aftermarket unit in select 2001-up Toyota & Lexus vehicles and retain the use of the factory JBL and JBL synthesis amplified audio systems
Lexus IS300 2001-2005
Lexus RX330 2003-2008
Lexus RX350 2003-2008
Toyota Kluger 2007-2013 "Grande" 
Toyota Prius 2004-2008
Toyota Prius 2009-2015
Toyota Tundra 2007-2013
Lexus SC430 2001-2010
Toyota RAV4 2006-2011Weight:
0.05KG