A loudspeaker is a transducer that converts electrical signals into sound signals; its performance significantly impacts sound quality. While the loudspeaker is often the weakest link in an audio system, it is simultaneously the most critical component for determining the final sound quality. There is a vast array of loudspeaker types, with prices varying widely. They operate by using electromagnetic, piezoelectric, or electrostatic effects to vibrate a cone or diaphragm, which then resonates with the surrounding air to produce sound.
Low-end plastic speakers often lack sound quality because their thin cabinets cannot effectively suppress resonance (though some well-designed plastic speakers can outperform inferior wooden ones). Wooden speakers reduce the sound coloration caused by cabinet resonance, generally offering superior sound quality compared to plastic models.
Multimedia speakers typically feature a two-driver, two-way design: a smaller driver handles mid-to-high frequencies, while a larger driver manages mid-to-low frequencies.
When selecting speakers, the materials used for these drivers are important considerations. Soft-dome tweeters are currently the standard for active multimedia speakers; when paired with digital audio sources, they mitigate the harshness often associated with high-frequency signals, delivering a sound that is delicate, airy, and smooth. Common soft-dome materials include high-quality silk and lower-cost PV (polyvinyl) films.
The woofer determines the speaker's sonic character, making its selection particularly important. Common types include paper cones-which come in variations such as coated paper, paper-wool blends, and pressed paper. Paper cones offer natural timbre, low cost, good rigidity, and high sensitivity due to their lightweight nature. Their downsides include poor moisture resistance and manufacturing inconsistencies; nevertheless, they are frequently found in top-tier Hi-Fi systems because they deliver balanced sound output and excellent audio reproduction.