Your search for 5.1 surround sound speakers returned the following:

Home theater speaker system

LOW STOCK

6 people say 

• includes 5 satellites and a subwoofer
• system frequency response 40-20,000 Hz
• 8" subwoofer with built-in 100-watt (RMS) amplifier

Home theater speaker system

LOW STOCK

107 people say 

• includes 4 satellites, 1 center channel speaker, and 1 subwoofer
• system frequency response 36-23,000 Hz (±3dB)
• 60-watt RMS sub with 8" woofer and Ribbed Elliptical Surround™

5.1-channel speaker system (White)

LOW STOCK

• frequency response 33-20,000 Hz
• five satellite speakers each contain a 2-1/4" BMR woofer for a wide soundstage
• 300-watt, 8" ultra-compact subwoofer
  

5.1-channel speaker system (Black)

LOW STOCK

1 person says 

• frequency response 23-20,000 Hz
• five satellite speakers each contain dual 2-1/4" BMR woofers for a wide soundstage
• 500-watt, 10" subwoofer

5.1-channel speaker system

LOW STOCK

• includes 4 satellites, 1 center channel speaker, and 1 subwoofer
• system frequency response 33-20,000 Hz
• 100-watt RMS sub with 8" woofer

Premium 5.1 surround sound audio console

LOW STOCK

• 21 custom-designed drivers for full-bandwidth, immersive 5.1 surround sound
• wireless subwoofer either stacks underneath main unit, or sits vertically in your desired room location on included mounting feet
• 500 watts RMS total system power; 800 watts peak power

Powered home theater sound bar with true 5.1 surround sound and wireless subwoofer

IN STOCK

• Dolby® TrueHD and DTS® HD uncompressed 5.1 surround decoding and reproduction
• slim, easily placed wireless subwoofer with 250-watt amplifier
• sound bar is only 2-3/4" deep to go with today's ultra-thin TVs

Powered home theater sound bar with true 5.1 surround sound and wireless subwoofer

IN STOCK

6 people say 

• full 5.1 surround decoding and reproduction delivers surround sound experience for almost all listener locations in any room
• wireless subwoofer with 150-watt amplifier
• sound bar is only 2-1/4" deep to go with today's ultra-thin TVs

5.1-channel Blu-ray home theater system with Wi-Fi®, Bluetooth® and wireless rear speakers

LOW STOCK

• home theater system with 3D Blu-ray player/receiver, 5 speakers and a subwoofer
• built-in Wi-Fi® — plays Netflix movies, YouTube videos, Pandora® Internet radio, and more
• includes wireless amp module for easier rear speaker setup