material

OK...first of all let me say this.... For years before I was even considering DIY audio, I bought a pair of ACI (Audio Concepts Inc) Sapphire III's from my little brother. Probably the most impressive thing about these speakers were the cabinets, they were made from 1 inch HDF! (High...

I designed a horn myself, and I tried to use plastic sheet to glue one in shape, but none of the material I used can produce the sound I desired. People suggested that I make a mold and mold one with the plastic injection machine, because with plastic injection technique, they can mold plastic...