After all, you'll want your speakers to be perfect after your first-ever production run, and you won't be able to work out the bugs in manufacture. And when all is said and done, there are no warranties, either ex- pressed or implied. A nasty letter to whoever dreamed up the sorry mess you tackled is about the best you can do. If you're still game, read on. The design evolved from my search for an outstanding midrange-woofer driver.
Good speakers start with good drivers.
TPX sounds about as involving as STP oil treatment, but, choice of names aside, Audax claims that this material is superior to polypropylene for loudspeaker diaphragm. The areas where TPX appears to trounce Polyprope, however, are in internal damping and rigidity. TPX is twice as rigid and three times better internally damped than Polyprope. In the bass region, it is easy to move the whole surface of a cone in unison, even a paper one. This orderly Piston action tends to fall apart in the midrange, however, with some areas of the cone Pushing while others pull.