About Pietra

We offer limited-production, hand-made loudspeaker designs. Enclosures are fabricated by a master craftsman from raw slabs of solid granite. All manufacture and assembly is done at our facility in Southern California. The electroacoustic design is carried out using proprietary software that includes our own engines for diffraction and transducer motor/suspension modeling. In fact, our interests go beyond the design, marketing and sales of loudspeakers. We carry out research in theoretical and applied acoustics, and leverage this research to create the best passive 2-channel designs we can.