The Yamaha NS-SP3800 Home Theater Speaker Package combines a YST-SW012 subwoofer with a set of NS-AP7900M and NS-AP7900E speakers to offer a complete surround sound package with hard-hitting bass and immersive audio to bring your music and movies to life.

New Natural Sound 5.1-channel speaker package 2-Way, dual woofer speakers with silk dome tweeter Wall-mountable speakers Magnetic shielding (all speakers) Removable grille [front, center and surround] 8" 100W subwoofer with Advanced Yamaha Active Servo Technology II for deep, powerful bass

The Yamaha NS-SP1800BL 5.1-channel home theater speaker package is a low cost, convenient way to enjoy the full benefits of 5.1-channel home theater sound. The NS-SP1800BL 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.