Okay so I am gonna buy GK 115 SBX cab. (With my Yamaha bbt500h 2x10 cab) The 15 cab is rated 400watts at 8ohm. The 2x10 cab is rated 250 watt 4ohm. What will happen with the cabs when I run them together? (In paralell) Will this result bad or something? Can I run this setup?