The Elf head is 200w @ 8 ohms and 130 @ 8. The speakers are all 8 ohms. The 1x10 is 300w; the 2x8 is 400. That makes for a waste of what the speakers could. Trace could build a head that run 200-250w @ 8 ohms and 300+ at 4. It could have the same width and depth as the head and therefor fit into the tray on the speakers. I would have bought it with a 2x8. The Markbass 500w head would go well with the Elf 2x8.