factory amp! lol. is actually not too bad. when I get around to it ive got a jaycar 1000wrms mono block amp and 4 x 125wrms for the front vdo gtm1650 splits and rear 6" sony 2 ways, 1 farad capacitor, 4 ga wiring and gold distribution blocks etc, leather headrest screens, rgb convertor (already have a dvd installed) for premo screen. used to spend lots of time on ice, but running a business and building my house (actually building it) has limited it some what.... my old car- now my lads...