Hi everyone I'm close to being done with my 5f1, so I wanna prepare the first start up. I have read that some uses a dummy load for this. Do you know how that is made ? Is this simply a resistor on a jack plug ? Also, do you think I can use my vox ac30 cabinet as speaker for this amp? It has Celestion G12M Greenback 12" (8Ω) x 2 Thanks.