The unique HA600/75 hybrid diffuser offers true broadband absorption combined with diffusion. This allows a room to still sound natural while controlling problem frequencies, in particular the "muddy" frequencies between 150Hz and 400Hz. Available only in clear perspex at present. The HA600/75 acoustic panel has a flock coated "suede like" finish in elephant grey. This finish is colour fast and extends the life of the panel. Please allow 2/3 weeks for manufacture and delivery. Peak absorption between 150hz and 1 Khz 50/50 split absorption and diffusion above 1 Khz - allows a room to sound natural 600 x 600 x 75mm Controls problematic muddy frequencies Diffuser insert can be easily removed to provide just broadband absorption Perspex insert (Timber not available at present) Creates a modern studio look Simple installation with either staple gun, 3M Command hooks or velcro tape Perfectly matches the LF65 corner bass trap for a balanced acoustic treatment Made in Australia / 10 year warranty We have recently upgraded the HA600/75 to the Mark11 version which has a number of significant improvements. The panel now has increased volume with a smooth radius under the insert. The Staple T fixing channels have been moved to the side panels to provide easier installation with either a staple gun or 3M Command removable hooks. The panel also has recessed channels on the rear to allow the fitting of adhesive tabs as an option. The patented Hybrid Absorber Diffuser HA600-75 is a unique acoustic panel that can function purely as an acoustic absorber or alternatively, as a hybrid diffuser/absorber, providing the flexibility to fine tune your acoustic environment. The Hybrid Absorber Diffuser HA600-75 acoustic panel is designed to receive a diffuser insert , for the purpose of modifying the acoustic characteristics of the panel. The diffuser forms a smooth radius, effectively spreading high frequency reflections. The diffuser insert also pro