A Retractable Audio Earbuds reviews compare the features and sound quality of the buds to other. Instead, professional-level earbuds from the perspective of someone who has never owned a comparable product. These earbuds pound out strong bass tones, with the same level of detail as with other music. The most common connectors are 1/4 inches and 3.5 mm stereophonic jack plugs and sockets, earbuds also have the capacity to reach the extreme volume levels. Headphones are widely used for listening to audio sources for recreation. In the professional audio sector headphones are used in live situations by disc jockeys (DJ) and sound engineers for monitoring signal sources.