How to power two subs off of one amp!
 

Im planning on adding two subs in my jeep, but because of money I would like to do it one sub at a time

So if my final result will be two 300 watt RMS (2 ohm) subs, what would be the best way to power them off of one amp?

And how can I use this same amp to safely power just one of the subs before I get the second?