While designing Directiva r2, we considered a coaxial driver instead of the Seas DXT tweeter. At the time nothing fit the r2 target well, but one was noteworthy. Since its availability in North America was almost nonexistent, we decided to forgo it. However, as r2's passive resistance enclosure optimization is taking longer than I hoped, I found this Sica driver at TLHP in France. At around 120 euros, it seemed like a reasonable risk, so ordered a couple from here. While not the same cutout as other woofers I have considered, it still fit Directiva r1's cabinet well. Since I had them around, it meant a quicker build for me....
Parts Express redesigned its .56 ft3 cabinet flat pack and so used the newer one. Due to the redesign, the cabinet builds nicely by using one of thes sides as a build foundation. The baffle comes with a rounded edge. While convenient for someone without a router, I find it easier to round later so I used my own blank baffle. Sica includes a passive crossover design so decided to use it initially. Since I did not have some of the parts, I had to order them and they arrived last week.
Since I had the cabinet, I started with it. Am not going to post all the build steps as it is very straightforward once you do a dry fit. Since the new brace is no longer centered, I marked the front baffle so I could center the driver on it. However, due to Sica’s unusual mounting pattern, took a different approach so I could still take advantage of screwing into the brace. Note it is important to drill pilot holes into the brace to prevent splitting. Here are some pics starting with the front baffle…
Aligning the lower mounting holes with the brace determined the driver offset on the baffle. Sica’s design calls for dual 2 inch round ports. I pondered this and after modeling, decided one would suffice. I also wanted enough room to have a longer port, so I located to the bottom portion away from the driver. Would have preferred the connectors and crossover below port but the port would block access, so relegated them to the top half…
This meant the crossover would be mounted on the inside top of the back. This allows for easy access to the crossover and main connections. Here is an inside view as I prepped to fit damping material before I glue the front baffle on…
Parts Express redesigned its .56 ft3 cabinet flat pack and so used the newer one. Due to the redesign, the cabinet builds nicely by using one of thes sides as a build foundation. The baffle comes with a rounded edge. While convenient for someone without a router, I find it easier to round later so I used my own blank baffle. Sica includes a passive crossover design so decided to use it initially. Since I did not have some of the parts, I had to order them and they arrived last week.
Since I had the cabinet, I started with it. Am not going to post all the build steps as it is very straightforward once you do a dry fit. Since the new brace is no longer centered, I marked the front baffle so I could center the driver on it. However, due to Sica’s unusual mounting pattern, took a different approach so I could still take advantage of screwing into the brace. Note it is important to drill pilot holes into the brace to prevent splitting. Here are some pics starting with the front baffle…
Aligning the lower mounting holes with the brace determined the driver offset on the baffle. Sica’s design calls for dual 2 inch round ports. I pondered this and after modeling, decided one would suffice. I also wanted enough room to have a longer port, so I located to the bottom portion away from the driver. Would have preferred the connectors and crossover below port but the port would block access, so relegated them to the top half…
This meant the crossover would be mounted on the inside top of the back. This allows for easy access to the crossover and main connections. Here is an inside view as I prepped to fit damping material before I glue the front baffle on…
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