Interesting question, especially over time. I would have to say that absolute worst was a Phase Linear Dynamic Tick and Pop filter that I purchased and returned in the 70's. It worked but got rid of a lot of music too. In my current living room system, it would have to be the TV and the DVD player.

Edited by 73Bruin (01/18/13 02:56 AM)
Living Room 24x18 open 1/2 flight up to a raised dining room/hall 24x12
Outlaw 976 pre-pro running 5.1 system
Outlaw 750 for Artison Masterpiece LCR and 2 NHT SuperZeros rears
Velodyne Servo FX-1200
LG OLED65C8PUA via HDMI2 to/from 976 HDMI ARC
Roku Ultra
Samsung BD-D5500 BluRay
Arris 6 Channel whole house DVR via Spectrum
Amazon Dot to 976 Analog input for Music

Family Room/Kitchen 24x15
Outlaw 1050
NHT SB-2 Main - Outlaw LFM-1 Compact Sub
Squeezebox v3 Classic
Visio 32" HDTV via Arris HD Cable Box