While 3D video is already running rampant throughout the latest HDTVs, another new bullet point feature is 3D sound, and naturally LG's newest home theater systems have it. LG will have four new home theater systems on display this week at CES, but the first one it's showing off is the BH9420PW, which uses "3D Sound Zooming" to match the positioning of sounds with 3D video being displayed on one of LG's TVs. It achieves this thanks to four upright speakers added to the traditional 5.1 layout and algorithm that detects depth of effects being watched in 3D. According to LG, this makes for a wider sweet spot than usual, but as always we'll let our ears be the judge. There's a few more details in the press release after the break along with a c
