For sale is a speaker output plug for the following models of Alpine PDX amplifiers.  There are many compatible amplifiers that use this plug. You are responsible for making sure this plug works with your amplifier. If you have any questions about your amps compatibility, feel free to send me a message. 

ALPINE PDX1.1000    Mobile Electronics: Power Amplifier    2006

ALPINE PDX1.600      Mobile Electronics: Power Amplifier    2007

ALPINE PDX1.600M   Mobile Electronics: Power Amplifier    2008

ALPINE PDX2.150      Mobile Electronics: Power Amplifier    2006

ALPINE PDX2.250      Mobile Electronics: Power Amplifier    2007

ALPINE PDX4.100      Mobile Electronics: Power Amplifier    2007

ALPINE PDX4.100M   Mobile Electronics: Power Amplifier    2008

ALPINE PDX4.150      Mobile Electronics: Power Amplifier    2006

ALPINE PDX5             Mobile Electronics: Power Amplifier    2008

ALPINE PDX5M          Mobile Electronics: Power Amplifier    2009

ALPINE PDXF4           Mobile Electronics: Power Amplifier    2010

ALPINE PDXF6           Mobile Electronics: Power Amplifier    2010

ALPINE PDXM12        Mobile Electronics: Power Amplifier    2010

ALPINE PDXM6          Mobile Electronics: Power Amplifier    2010

ALPINE PDXV9           Mobile Electronics: Power Amplifier    2012