I have a MarkBass CMD121P combo, which I love for many reasons and I've been using it a lot since I bought it last May. What I don't love is the harsh tweeter. Blergh. I am considering disconnecting the tweeter and see what it sounds like. I imagine that it would not be difficult to open the thing and disconnect a couple of wires. I am also considering replacing the tweeter with something else that sounds better. Would it be bad to simply disconnect the tweeter? I suspect the impedance of the internal speaker will change... The amp is designed to run at 4ohm minimum, and I often add an 8ohm cab to the combo... will disconnecting the tweeter be bad for the amp when using an extension cab? If I replace the tweeter, ideally for a non-piezo type... does anybody have any recommendations? And again, will the impedance difference between piezo/non-piezo types create problems? I have no idea what values I should look for. I came across a couple of threads where someone had replaced the piezo tweeter with this: http://www.bluearan.co.uk/index.php?id=MON100190 which is an 8ohm tweeter... and reported good results... but I have no idea whether that was using the combo by itself or with an extension cabinet, and I have seen no reports after a reasonable period of time confirming that "it's all good after a couple of years of frequent use" etc... I'm a little lost here, so I'd appreciate any help/suggestions. I don't want to damage this combo that I love just to remove something that bothers me but it's not a deal breaker. Cheers!