part of the problem with the mod sbm-1 is alot of folks look at it as a toy, since it does not appear to be a pro tool, like the AD1000. Honestly, the Mod-SBM-1 holds its own over the AD1000 in my opinion, and quite honestly, even if the improvement is only marginal, the other advantages (size, powering options, ease of use, ability to get it repaired, etc.) beat it hands down.