The Piezo Source bimorph Motorola speakers are not the same as simple piezoelectric speakers. Our manufacturing process is roughly equivalent to having a speaker with two crystals rather than one. This gives our speakers a much longer lifespan, efficiency and long term performance and stability. Piezo Source, Inc. has been manufacturing and supplying the highest quality piezoelectric speakers since acquiring the exclusive rights, designs, and manufacturing line from Motorola in 2005.