Ive messed with 400 watts, if its class d it might do ok only if its mono block, other than that stock would hit just as hard lol. I got a JL audio W3 10" getting 900 watts. Its all in the tuning, good hardware does matter tho. High notes kill sub's. Keep it in the lows

 

Its all in the ohm and wiring ... but I always have an amp that puts out more rms than my subs can handle.. I run a large system though, for a small system as yours any of those cheap amps will work for 300 rms, but I would get at least a 4 gauge wire kit, and 1000 watt amp, it may say they push the rms but really most amps are over rated and really only put out lesser rms.

 

Yes and remember with bridging or playing between parallel or series (multiple subs/speakers), you're changing your resistance (ohm's) which in turn is changing your wattage. This could put you into an underpower/overpower situation. Technically the amp should be built to allow bridging as well otherwise you can damage the amp. Like MHOWELL34, I run a mono amp myself (but I'm not putting out 900 watts hahaha - must be a mirror shaker)