OK. I need some input on a few things. I did a couple searches and haven't got any good answers so I apologize if this has been covered. First, I want to check the specs on the speakers used in GK RBH410s. Anyone have a link to the actual drivers in the cab? I want to see what db the real low frequencies are said to produce. This will be influencing my decision on buying the RBH and I couldn't find the info in the manual. Can anyone vouch for how she handles a low B? I have an old Backline 410, also from GK, that I need to sell. But first I'd like to swap the blown driver. Is it ill advised to replace the speaker myself? I can send it to a shop for 80-100 bucks, but can probably handle it for around 50 on my own. I've been told I was crazy by a guitarist for considering it, though. Thoughts on DIY repair? The third 410 in this equation is a brand new NEO from Avatar. However, I think they sent me one with a damaged driver. Which sucks. Dave said I need to take the one I think is creating the buzzing noise out of the cab and check to see if it is in fact ready for the toilet. I don't know how to do this. Is he referring to using an OHM meter to determine if it's blown? After I'm sure which speaker it is and what's wrong with it, does anyone know how Avatar honors their warranty? Am I going to have to pay to have the whole thing shipped back to them or will he just send me a replacement driver? This of course begs the DIY replacement question again. Also selling a gk BL115, to even out the subject equation. Unrelated, but I'm stressed about my GAS tearing me (and my wallet) apart. I don't want to buy the RBH if it's going to suck it up, and I can't find anywhere that has one to try. I need to sell the backlines ASAP but would rather sell one with 4 working drivers. And I don't want to keep the Avatar if it's going to suck it up after I replace the driver. These are all questions I have. Any/all input appreciated.