I have an Alpine MRV-F407 4/3/2 Channel V12 Series Amplifier for sale. I used it for about 2 months. I'm planning on getting a 5 channel amp because I will be adding a sub soon. Retails for $530 and I'm asking $400 obo. Specs can be found on the Alpine website http://ecominet2.alpine-usa.com/pls...y=105&p_main=10