Hey all,
New to this forum with some questions regarding my car audio.
I recently bought a car with the intent of installing aftermarket deck, amp and sub. However, the car already has a sony touchscreen deck and an alpine mrp-m500 powering two mtx speakers in the back and two infinity speakers in the doors. This leaves me with my question, is there anyway for me to add a sub to this setup since all of the channels on the amp are taken up. If so, would the amp be able to handle the added sub?

Thanks in advance

 

Any Ideas?