CMS-151135-078S is a micro-speaker designed for compact audio applications with spring contact termination. It features an 8 O nominal impedance (6.8–9.2 O range at 2.0 kHz), rated input power of 0.7 W (maximum 1.0 W), and a resonant frequency of 550 Hz in free air and 850 Hz in a 1 cc enclosure. The speaker delivers a sound pressure level of 91 dB typical at 0.7 W measured at 10 cm in a 1 cc box, with a frequency response spanning 100 Hz to 20 kHz and distortion controlled to 15% at 800–1,200 Hz and 10% at 1,201–5,000 Hz. Constructed with a PEEK cone material and neodymium-iron-boron (Nd-Fe-B) magnet, the speaker measures 15 × 11 × 3.5 mm and weighs 1.5 g, operating reliably across -20°C to +70°C. This compact design is ideal for portable electronics, hearing aids, notification systems, and other space-constrained audio applications requiring high-quality sound output.