Does the Ashdown ABM500 Evo II make at 8 ohms. I did a search but couldn't find this info. I'm thinking about getting this head and starting with an 8 ohm cab so I can add a second cab later. Smart? Or just go with a 4 ohm now. I was thinking about a 1x15 and a 2x10, or maybe just a 2x12. I'm thinking about Avatar cabs. Thanks.