I have an A300 and I don't recall ever having to turn it halfway up to get decent volume though, frankly, I don't listen to music as loudly as I did when I was younger. I have B&W N804's and don't know the relative sensitivities are or how loud you like to listen, but it sounds odd to me.
As for breaking in, I would have thought that a demo unit would have already been broken in. Doesn't AA have a 30 day return policy that they are pretty good about? May be worth talking to them.
As for breaking in, I would have thought that a demo unit would have already been broken in. Doesn't AA have a 30 day return policy that they are pretty good about? May be worth talking to them.