What is Reddit's opinion of PIONEER 5CH AMP/100X4+600W/BASSBOOST REM?
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1 review of this product found across Reddit:

I have an '07 and I replaced the 6disc changer in the frunk with this amp along with 2 crossovers.

I'm currently installing this Subwoofer i've made in the trunk, I was going to put it behind the passenger seat but it was at little too restrictive on moving the seat back and there is no room under the seats. Also I have the Bose system speakers installed and have not replaced them yet, they take a lot of work to replace.

Maybe I'll post something about how I've done the install but there are plenty of guides over on 9 planet.