Yup, exactally that, should be easy and fairly cheap to find a amp that falls under those specks. Pretty much any amp will work, Alpine, Boston Acoustics, Kenwood, Power Bass, Power Acoustic, Sony, Boss Audio, Polk Audio, Kicker, JVC, Clarion, Ect...much to choose from.

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2000 FORD RANGER XLT 4x4 Extended Cab 3.0L FFV
Flareside Bed
ACCESS Tonneau Cover-LEER Fiberglass Topper-Manik Brush Guard-Pro Series Hitch
Kenwood Amp and Sub-Sony Deck