When combined with proprietary range limiter diaphragm system, the 244 bass case with FlexRange technology absorbs up to 50% low end (below 60Hz) and retains 75% more high-end (from 400Hz and above) compared to the broadband different option. Compared to other commercially available products that are simply wrapped in fabric, DIY type plates, the 244 bass trap with FlexRange Technology precision engineered and manufactured to exacting standards. We start with the patented two-frame system that allows lower end to be absorbed from the sides and back, while the professionally constructed frame keeps a crisp, sharp edge. GIK Acoustics uses high-quality fabrics as standard options that are too cheap canvas or micro suede.