I just noticed GK updated their products section of their website. The 400RB's aren't on there anymore. Neither are the RBX cabinets. Looks like the new MBX cabs are identical to the RBX, with a chrome grill instead. The new MBE cabs are for the MB combo's. I think they did good with the cabinets, but the 400 was a nice head for a cheap price, but I guess in this economy, you have to cut somewhere.