Came across that Best Buy has a lot of Kenwood car audio on clearance including this super tiny but powerful amp Kenwood 300W Class D Bridgeable Multichannel MOSFET Amplifier Gray KAC-M3004 - Best Buy

This guy does a lot of amp tests and found the amp puts out more than it's rated output.

After that video came out the price went from 100 to 125 on Amazon. So 65 bucks is a steal.

I bought two for my SRT-6. As small as they are they should be easy to install and replace the stock amp.