How is this car audio system for metal?

10's are by far the most responsive subs for metal! Make sure you run your amp crossover no les than 80 hertz. "hz" Alpine is fine for this. My favorite is the MTX thunder series subs. 6000 to 8500's you cant lose, Your amp is good for all frequencies, Rock, rap etc'. I would add another 10" for better measures. A 1 channel amp is better suited for lower "ohms" but Metal i would run 2 subs in series at 8 ohms for higher volume not louder b! Hope this helps!