They advised that my cabinets are at about 44 liters volume, and the specs provided by Fostex for a BR give about 45 liters, so the difference is, in their opinion, negligible. I reached out to Madisound, and they were pretty helpful too. I am going to add more Dacron, but wanted to ask.in your experience is it the materials used (the Mahogany, Poplar hardwood vs the Maply Plywood) that can do this, or is it the decreased internal volume, and am I going about the right methods to counter it? I have tried installing acoustic foam and stuffing with Dacron, and its helped alleviate things maybe 50%. The Maple, Poplar cabinets give the drivers a harsh sound in the upper mids and high end. They are roughly 360,000 cubic centimeters smaller, internally, than the specs provided by Fostex. On the Mahogany and Poplar cabinets I shrank things down a little thinking it wouldn't do any harm. They are just over 100,000 cubic centimeters larger internally than the specs provided by Fostex. On the Maple Plywood cabinets I inadvertently increased the cabinet size a little. I decided to make a prettier pair of cabinets out of Mahogany and Poplar. I recently picked up some Fostex FE206En, and after trying them in a pair of Maple Plywood bass reflex cabinets was very happy. I decided a while ago it would be fun to try my hand at full-range speakers. I am new to speaker building, but have spent a lot of time building headphones for myself and others: This thread has been dead for quite a while, but am hoping to get a little help.
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