RS PRO Round Speaker Driver, 12 W nom, 8 Ohm The RS PRO round speaker driver is an essential part of sound delivery systems that require multiple tones, such as sounders or alarms. The mylar cone speaker is weatherproof, so it can be used in outdoor loudspeakers where paper equivalents would be compromised by damp. Mylar is a lightweight stretched polyester film that's durable as well as moisture-resistant. This speaker driver is easy to install - just fix into place at two soldering points. This 87 mm black speaker has a nominal power rating of 12 W and an 8 Ohm impedance. Like all RS PRO products, it's been thoroughly tested by engineers for quality and performance. As well as for outdoor use, you can use this mylar cone speaker driver for PA and intercom systems in offices and on school grounds. Features and Benefits - Round speaker driver - Nominal power rating of 12 W - Speaker impedance 8 Ohm - Dimensions of 87 mm (W) and 87 mm (L) and 34.3 mm (D) - Mylar cone material - Speaker driver size 8 cm (3 in) and under - RoHS (Restriction of Hazardous Substances) compliant - Conforms to ANSI/ESD S20.20:2014 and BS EN 61340-5-1:2007 Electrostatic Control Standards