Reasons not to build a midrange ported box?

[LineArray]

Usually, sub drivers do not operate up that high (300 Hz) cleanly. It's not the cabinet, it's the driver.

To get lower Fs one of the tradeoffs is usually a heavier cone, which is fine in the low frequency domain, but lacks the transient response needed for upper bass and there may be cone breakup issues as well, depending on the make of the driver.

"Unobtrusive" behaviour up to 300Hz is always my personal
goal when implementing subwoofers. At least cabinet resonances
should occur above that ...

It is for minimizing the risk of a subwoofer getting "detectable".

But depending on the crossover this can be surely compromised, and
you are right in that many pure subwoofer drivers can't do it.

Best Regards

 

[Loren42]

I'll try and get some plots this week if it helps.

You need the equivalent 1 meter on-axis plot and it would be nice to see the polar plots or off-axis plots as well if you can get them.

 

[oublie]

I'll measure a single driver raw 1m on and off if i can. I'll also measure my prototype 10 driver 1.5k low pass open baffle array at listening position and 1m.

 

[Inductor]

I don't know why, I would check Xmax. at the same time...
I don't know if WinIsd is the best software to produce the Mid driver enclosure you need... (maybe good for Mid/woofers. If a mid in a 3-way, not 4 sure).🙁