I recently had the same debate, sealed, ported, or passive radiator. I was quite certain I should do ported and was convinced otherwise by somebody with much more experience. Their thought was given the use (music only), given the listening levels (loud but not painfully so), and the amplifier (behringer NU1000dsp), a sealed cabinet would provide more than enough bass.
I built a 1ft^3 sealed cabinet using a Dayton Audio Titanic 10" driver.
Prior to EQ adjustments the response rose roughly 12db from 20hz to 70hz. Instead to attempting to increase output at 20hz I decreased output of everything above 30hz to be closer to 20. After doing so and applying a highpass filter at 20hz I added about 6db to 20hz via EQ.
After making adjustments to its output via parametric EQ in the Behringer, I am getting a flat response from 20hz up to 100hz+. I am still playing with crossover settings; using 60hz at the moment.
Ultimately, while ported may be more efficient and louder, is it really a benefit if you never play it to its full potential?
In my case, this little sub rattles the windows and various pieces of furniture.
My room is L shaped and roughly 444sq ft. with no doors between it and the dest of the house.
I really have no need for the range between 20-30hz but if I can have it, why not?
The attached curves are the before and after response measured outside with the sub 6' above ground.
I may build a stereo pair of 8" or 10" subs in the future. I am not displeased with the results, but from what I understand stereo subs are better than single.