21" DIY Subwoofer Bass Test! 20hz! I had to squint there was so much air. Order with code Jilesgsg - YouTube
21" DIY Subwoofer Q&A and Review! The Devastator - Horn Loaded Eminence NSW6021-6. GSG Audio! - YouTube
Triple Subwoofer BASS Measurements! minidsp 2x4HD works magic. Order with code Jilesgsg - YouTube
GSG Audio Design - Here we're test fitting the new Eminence Tour Grade 21 inch subwoofer (NSW6021-6) in two of our new DIY subwoofer cabinet kits. On the top left pic is
Www.gsgad.com. The Birch Devastator 21 is here. There are 2 versions. A home theater version tuned at 19hz and a pro audio / music only version, tuned... | By GSG Audio Design | Facebook
Dual Beast Mode Devastator Build and Integration | AVS Forum
GSG Devastator Horn Subwoofer Build | AVS Forum
18" GSG Audio DIY Marty Cube Subwoofer is easy to build. Order with code Jilesgsg - YouTube
Old vs new. After a 4 month wait, so exited it's finally here. : r/hometheater
Www.gsgad.com. The Birch Devastator 21 is here. There are 2 versions. A home theater version tuned at 19hz and a pro audio / music only version, tuned... | By GSG Audio Design | Facebook