I stopped by two stereo shops last Sat. and they listened to my car, I've got two Alumapro Alchemy twelves with a Cadence A5-HC pushing them. 600watt mono amp. All I hear is that my subs are underpowered. They are suggesting a 1000 watts instead of 600 for the subs. They are wanting to sell me a 1000 watt xtant amp for $1000 my subs have a 300 watt RMS. Does it sound like my subs are being underpowered or are they just trying to make some $. My car is pretty loud but Why spend the money on the subs and possibly be underpowering them. I can't see spending a grand on the xtant, I'm just wondering if these subs do need the watts.