Hi guys, First time poster so please be gentle... I'm a bassist in a rock band and am currently competing with two guitarists who play through a Peavey 5150 + 412 cab and a Fender EVH + 412 cab...they sound sweet but they ain't half loud! I'm currently playing through an Ashdown 500 EVO II combo amp, pretty pitiful to see it on stage next to the two guitar stacks! So, this is my question. As with anyone, I'm on a limited budget. Should I add a 115 cab to the bottom of my combo or should I add a 410? Will this give me much noticeable difference when going through a 500 watt head? Should I save my money and trade in for a more powerful head playing through a 410 cab? I understand that I'm not going to be able to blow the guitarists out of the water without purchasing a pro rig however I'm ideally looking to gain more volume whilst also increasing the low end of my rig. I have the funds to purchase an Ashdown 410 ABM or a ABM 115. Please could you advise? Thanks guys.