Alphasonik Premium In Ear Noise Isolating Headset Earphones/Earbuds/Headphones with Stereo Microphone & Remote Control Made for Apple iPhone iPad iPod Samsung Galaxy and More IOS/Android Smartphones

Yamaha YST-SW216BL sets the standard for subwoofers in this class with high dynamic power and low-noise performance thanks to Advanced YST II, a Linear Port, frontfiring design and other sophisticated features. Advanced Yamaha Active Servo Technology (Advanced YST) is a unique system in which the speaker and amplifier work together to cancel out impedance so the speaker unit has a perfectly linear motion. Advanced YST helps to ensure the highest levels of sound pressure and overall performance.