I just bought a pair of P3L-S10 pre-loaded enclosures. These speakers are said to be internally wired dual voice coils at 4 ohms impedance. Each box only has 1 set of spots to hookup like a single voice coil. With it being internally wired and one set of hookups does the change my total ohms if I were to wire these parallel?...or would it be 2 ohms like it would be if single voice coil? With these speakers being rated at 300 watts RMS and 600 peak how many watts amplifier would be best? 600? 500? I'm really just looking to get the most I can out of these two little guys? Any suggestions?