The Sony OEM speaker driver Model No 1-504-548-21 is a 4-inch  speaker driver metal frame, designed for use with Panasonic, Sony, and Philips brands. With a 3.2 ohm impedance and 2.5 Watt RMS power, this speaker driver is wired. The metallic colour and Sony branding make it a stylish and reliable choice for enhancing your home audio and portable HiFi setup. Ideal for those looking to upgrade their sound system with high-quality, compatible speaker drivers.