The 100w head is not loud enough for me so can i run it into the return of a louder head , this would mean the louder head having the 4x12 connected + the code head would have no speaker connected , now i always thought that solid state amps do not require a load box but the manual says do not leave the speaker un connected , so can i run this way or do i need a load box even tho the amp is solid state ?