I decided to fork out the study on directivity. And move midranges/fullranges/midwoofers etc. Basically anything that's 2" or larger.

Let's start with the B&W 5" Continuum FST from the 80

Data courtesy of @Dcibel

Here it's mounted in his test cabinet of 222mm x 414mm with a round-over radius of 10mm.

Here are the original frequency response and distortion measurements here:

Now I imported the data into VituixCAD2 to look at the directivity:

Recall, here's the on-axis response:

Off axis:

Nothing can be done about that dip around 13KHz, but would the resonance at 16KHz benefit from a notch filter?

Let's straighten out the on-axis response and insert high and low pass filters for an

Before notch filter:

After notch filter:

Suppose we didn't try to flatten out all those lumps and bumps, but still aimed for acoustic LR4 @ 4HKhz:

POLAR MAP for a straightened on axis, LP and HP filters for acoustic LR4 HP@ 400Hz and LP @4Khz:

POLAR MAP where on axis not straightened LP and HP filters for acoustic LR4 @ 400Hz and LP @4Khz:

Let's start with the B&W 5" Continuum FST from the 80

**3**D4, released in 2021:Data courtesy of @Dcibel

Here it's mounted in his test cabinet of 222mm x 414mm with a round-over radius of 10mm.

Here are the original frequency response and distortion measurements here:

Now I imported the data into VituixCAD2 to look at the directivity:

Recall, here's the on-axis response:

Off axis:

Nothing can be done about that dip around 13KHz, but would the resonance at 16KHz benefit from a notch filter?

Let's straighten out the on-axis response and insert high and low pass filters for an

**acoustic LR4**@ 400 Hz and 4000Hz

Before notch filter:

After notch filter:

Suppose we didn't try to flatten out all those lumps and bumps, but still aimed for acoustic LR4 @ 4HKhz:

POLAR MAP for a straightened on axis, LP and HP filters for acoustic LR4 HP@ 400Hz and LP @4Khz:

POLAR MAP where on axis not straightened LP and HP filters for acoustic LR4 @ 400Hz and LP @4Khz:

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