The following post is made assuming that you're meaning
each speaker is rated for 300w RMS or 600w total for the pair......
If it were me looking at that specific equipment and needing to provide an amplifier to them I would first wire the subs in parallel to create a 4 Ohm nominal load like so:
Then you're going to need an amplifier that will make around the needed 600w @ 4 Ohms.
Most likely the cheapest out to that end would be to get a 2-channel amplifier that makes 600w @ 4 Ohms in mono bridged configuration.
Something
like this would do the trick nicely and for a fairly reasonable pricetag.
Bear in mind that's full retail pricing and that same amp can be sourced much cheaper elsewhere.
If bought through
Crutchfield, however, you get the peace of mind that comes with a full 3 year warranty.
If you don't mind doing the
eBay thing look for a seller under the username barneyselectronics.
He stocks Profile gear constantly and he doesn't play around with shipping. You pay? He ships. Period.
Now that you've wandered through my ramblings let me close this post with ~
//content.invisioncic.com/y282845/emoticons/wave.gif.002382ce7d7c19757ab945cc69819de1.gif Welcome to the forum!