I'd really appreciate some help in understanding my amp/speaker/ohm question. I have a Hartke HA2000 with a 4x10 (8 ohm) cab. the manual says I will get 130 W from an 8 ohm load and 200 W from a 4 ohm load. Now I understand this (Two 8 ohm cabs = 4 ohm load) Everything is clear up to this point. The Hartke 4x10 and an Ampeg 2x10 cab is my current configuration and everything is cool with that. BUT... I have one more Ampeg 2x10 cab (also an 8 ohm) I hesitate to add this because I believe it'll lower the ohms to about 2. My Ampeg speakers are rated 200W (these are the ones that are used with the Ampeg Micro VR) SVT210AV So my question is, "Can I do this without damaging the amp or speakers? As an alternative would I be better off getting an 8 ohm 15" speaker cab to use with the 4x10? Any recommendations/advice would be great appreciated. Thanks.