Here's some pics of the Tweeters for the system.
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I experimented with positioning, and where the components are placed is the best compromise. The gap helps de-couple in the horizontal plane.
There are only 8 Tweeters in the cab. The vent at the back is purely for airflow, just to keep the Neos a little bit cooler.
The Tweeters are wired Series/ Parallel terminating at 16 ohms. There is just a row of caps for the filter. No nasty coil as there is nothing underneath them. The tweeters operate independently from the main system. I have separate control for them.
The compression drivers do cover the range, but I have to admit, that tweeters on the top of a system can had something extra, 16khz sounds different from a tweeter than it does from a compression driver.
There are also sound systems boys that insist that tweeters are in the system. This is also done for those people. I try to please.