Another thing to keep in mind... open back cabinets, like the Valveking 2x12, are less efficient on the low end, and tend to get a little flabby at high volumes. Where as, closed back cabs, like the 4x12, handle the low end better, and will tend to be a bit punchier at higher volumes. Also, with the open back cabs, the sound is spread out more evenly (the sound is coming from the front and back, therefor, it is more 3 dimensional), and closed back cabs are usually very directional (standing to the side of the cab, and directly in front of the cab sounds completely different). Either way you look at it, the stock Valveking speakers are pretty much crap in my opinion and experience.