Thoft - a story for you. The 3.5 woofer is custom from Vifa, and built to handle a lot of power. However, the first production batch had nearly 50% woofer failures in the field. Turned out that Denmark had banned epoxy for health reasons and the substituted polyurethane didn't handle the heat. Very big deal, especially since customers had been waiting months for the model release. We got to the bottom of it rather quickly and our dealers were really supportive. Each replacement driver was sent with a copy of Michael Hedges Arial Boundaries album as an apology. Those albums were the best PR money we ever spent!
Michael heard about it and thanked us with an autographed first pressing. Great album. Sweet lemonade from bitter lemons.