Hi, I need some advice on replacing the speaker of my EBS 15H Evolution ProLine 2000. The speaker is blown so I must change it. The stock speaker is a Eminence Kappa 15C. It has a 4 ohm rating and I'm thinking about changing it to a 15A 8 ohm to make it more easy to expand my rig. I'm using a Mark Bass F1 and it can only handle 4 or 8 ohms. The other alternative is upgrading the speaker to for instance a Kappalite 3015, but I'm not sure if the cabinet suits this speaker.