Without a doubt I hear and feel a distinctive difference in the resonance in my 2 chambered Sadowsky's compared to the non chambered ones I have had in the past. I love them !![]()
Are your comparison basses spec'd the same and the same weight? You will definitely hear a weight difference in resonance between a heavier and ligher instrument.
Again, not saying you aren't hearing what you are hearing, but rather that you are attributing it to the wrong design factor.