I have a Mesa 400+ that i've always used into a 4x10 (8ohm) cab rated at 600 watts with an additional 1x15 (8ohm) rated at 400 watts. If I used the 400+ with just the 15 would I likely blow that cab if I "cranked" the volume or played for an extended amount of time though it? Thanks for the advice in advance. I just might be in a place soon where I only own one cab without a backup . Better safe than sorry, ya know?