Paul, this is what some of us suspected and mentioned on the other thread. It's happened here at least three times in the past few years(three have admitted it)that they were either connected to just the upper terminals and got no bass or the lower terminals and got no highs. The connecting strips that Randy pictured have to be there and be tight so that both sections of the speaker are actually operating. Apparently you have your speaker wire connected to the upper terminals, so you can demonstrate the difference by connecting instead to the lower terminals, when you'll get bass but there'll be no highs.
If you didn't get those little metal strips with your M80s, contact Axiom. In their absence you can connect all the terminals by running a short piece of speaker wire through the holes from the top to bottom terminal(two pieces of wire per speaker)or stripping enough insulation off the end of your regular speaker wire(maybe 3")so that you can run it through both the top and bottom holes in the terminals. In either case be careful that there are no loose strands of wire touching metal.
Okay, I now see from your last post that you do have the metal strips and presumably they're tight. So, you just have to connect to either the top or bottom set of terminals and the strips should let the power also go to the other pair. You haven't said whether your speaker wire is directly connected to the top or bottom terminals, but if it's the top ones, switch to the bottom to see if there's a difference.
