2PCS 3W 4 Ohm Mini Horn Speakers 40mm 50mm Compact Loudspeaker for Arduino DIY Audio Projects

2PCS 3W 4 Ohm Mini Horn Speakers, 40mm and 50mm Diameter Compact trumpet loudspeakers designed for DIY audio projects and small electronics Product overview These two mini horn speakers each deliver 3W nominal power into 4 ohm load and are supplied in two compact sizes, 40mm and 50mm diameter. They provide a focused, audible output well suited to shortrange sound tasks in hobby electronics, alarm and notification systems, and small audio projects. Key benefits Ready for small electronics projects: Designed to be driven by small amplifiers and common microcontroller audio modules, making them suitable for Arduino and similar platforms. Compact and space efficient: 40mm and 50mm diameters fit into tight enclosures and panels while producing clear, directional sound for alerts and voice prompts. Easy to integrate: Standard 4 ohm impedance is compatible with many lowpower amplifier boards and driver circuits used in DIY builds. Practical dualsize set: Includes two speakers so you can choose the size that fits your project or use both for multichannel setups. Main specifications Quantity: 2 pieces Power: 3W nominal per speaker Impedance: 4 ohm per speaker Diameter options: 40mm and 50mm How this solves common problems Replaces bulky speakers when enclosure space is limited, without sacrificing audibility for shortrange applications. Simplifies prototyping by matching common amplifier outputs and microcontroller audio drivers. Reduces the need to search for matched small speakers by providing two practical sizes in one package. Typical use scenarios Arduino sound output: Drive alarms, chimes, or recorded voice prompts from an Arduino audio shield or amplifier module for doorbells, timers, or interactive projects. Small alarm and notification systems: Provide clear audible alerts for DIY security, sensor alarms, or equipment status indicators in workshops and hobby setups. Educational robotics and toys: Add audible signals, speech playback, or sound effects to robots, remotecontrolled models, and learning kits where space is constrained. Compatibility notes used with lowpower amplifier modules and microcontroller audio outputs rated for 4 ohm loads and around 3W per channel. Suitable for common hobby platforms and small audio driver boards. What you get Two mini horn speakers: one 40mm and one 50mm diameter, each rated 3W and 4 ohm. This pair of compact trumpet loudspeakers offers a practical, easytointegrate audio solution for hobbyists and makers working with Arduino and other small electronics platforms.