Amazon.com: TV Speaker Passive Amplifier Set: Redirect Home Theater Sound Toward You, Not The Floor Without a Costly Soundbar. Improve Sound Clarity. Great Gift Idea for Mom, Dad, Audiophiles and Seniors :
ELAC Muro MSB41L (Black) Passive 3-channel home theater sound bar at Crutchfield
What is a Passive Soundbar? Passive vs. Active Soundbars - The Home Theater DIY
Q AV System LCR50 (Passive Soundbar only) : Amazon.ca: Electronics
Amazon.com: Monitor Audio SB-4 Passive Soundbar Black : Everything Else