I've read many of the discussions regarding clipping/underpowering/overpowering but my issue is this. The head I'm looking to buy is a 350W head, 4x10 Cab & 1x15 Cab. 350W head @ 4 Ohms (240W @ 8 Ohms) 4x10, 400W @ 8 Ohms 1x15, 200W @ 8 Ohms The Cab's impedance is halved therefore I interpret this to be a 350W head @ 4 Ohms to be halved to 175W to each Cab. If I assume I am correct the 1x15 is just 25W below capacity (pretty close) and the 4x10 is 225W below capacity. Is this too much headroom???? Am I going to be loosing potential from the 4x10's????