djk Posted April 12, 2015 Share Posted April 12, 2015 " can you please explain how you are going to make bass with such a short horn length?" It won't have any more bass than a LaScala, it needs a subwoofer. Size similar to a Peavey FH1. "The rear chamber of the top driver also needs to be same volume as the triangular chamber of the bottom one." The area between the ramps will connect the back volumes of both drivers.The 12PE32 is 120mm deep behind the mounting plane (front mounted). The mounting board is 18mm, so the magnet is 102mm deep. If the inner driver is mounted behind its mounting board that is another 18mm, so we are down to 84mm. I was thinking of making the passage 75.5mm (like the stock LaScala), so the magnet sticks into the cone of the other driver by 8.5mm, plenty of room for cone travel.The mounting hole is 281mm, and the width of the passage is about 75.5mm, so the area at the effective throat is about 212cm (the design calls for 231cm, close enough).Going either direction from the throat about 32cm (the middle of the 90° bend), and then moving forward 55cm to the mouth gives us a total length of about 82cm (the design calls for 84cm).With the cabinet about H610mm x D610mm x W760mm the mouth is a bit bigger than required (better a bit big than a bit too small). Quote Link to comment Share on other sites More sharing options...
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