“I recently purchased the IP112ER with the extension 12 and absolutely love it. I can finally carry everything in to the gig in one trip, not to mention the sound is unsurpassed. I plan on buying one more set of the IP with extension then depending on the gig I can take one stack or both stacks. I think Jim has done an amazing job with these cabinets. I have played metal, rock, funk, jazz thru these speakers and no matter the style these still deliver. ” Thanks. Shaun Marvin – Bassist US Army Band