Tapped horn with seas L26ROY

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Decrease S2 to 150 for a start, this way you'll be increasing the compression ratio, 2:1 is considered quite safe, so play a little. Alternatively, decrease S3 but this will lower overall sensitivity.

Increase L23 to compensate, 375 cm as a start.

The peaks at 100 Hz and above usually doesn't worry me as much. as they tend to be exaggerated in sharpness and/or level (sim versus measured) and are smoothed by your low pass filter. That being said, it doesn't hurt to get them as smooth as possible.

You can also experiment with adding a chamber (Vtc 33333 cm^3 as a start), as Vas is reasonably high. The second peak is usually not as high as simulated and you can lower L23 to 250 cm to compensate).

For all the above: Capture the result, with Ctrl + C, then change a single input parameter and compare the result with the captured state.
 
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After playing with the wizard this is as good as I can get it... looks as if I may have to sacrifice the bottom end though as will be wanting to cross at 100hz with a front loaded horn. Maybe this isn’t the best driver for the application, also I am not sure if cms is correct as it does agree with the spec sheet if determined.
 

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After playing with the wizard this is as good as I can get it... looks as if I may have to sacrifice the bottom end though as will be wanting to cross at 100hz with a front loaded horn. Maybe this isn’t the best driver for the application, also I am not sure if cms is correct as it does agree with the spec sheet if determined.

I think it would be a shame to hide away such a nice-looking driver in a TH :).

Make sure that you use PAR, not CON, segments in your sim, if you plan to fold that TH into a rectangular box.

I suspect you are going to run into problems trying to fit that driver in a TH that on paper looks like it will work well.

I'd be tempted to use an offset TL with this driver instead. You'll give up some gain (wrt a TH), but the usable passband should be wider.
 
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