First lets get the obvious out of the way..... IF you are talking about the Finalizer V2 DF
[I CAN'T speak to the Finalizer V1].... ringing is NOT AN ISSUE.... but you also have to put TWO PILLOWS in the box vertically and not block the vent. Oh and BTW.... I run CLUB VOLUME in my house on occasion.....HOUSE MUSIC all night long...
So if it was going to ring... I would know.....
Being that I have had BOTH in my system at the same time..... IF I had to pick one it would be the Finalizer all day... yes the boxes are of similar size AND tune.
The Finalizer is a weird beast [as well as ALL the Devs] in that it's ultra clean tone
is REALLY HARD to describe without sounding like an audiofool fanboy.... THIS is one box that you have to hear in person to really understand its tone. If you read through the DEV threads you will see that I'm not the only one who says this about the Devs. They have a tone that you actually have to get used to.... which is not a bad thing.
HEAD to HEAD:
Room pressurization: DEV
.... Devs can really bring out the room rattles...
.... they sound very different from each other. One is NOT better.. but you will prefer one or the other. IMHO the Devs have a more solid and grounded vibe that I like.
...now this is NOT from an SPL perspective...I had the same driver in both boxes and metered the same SPL... the Dev will be perceived as not as loud BUT, MORE enveloping and present. With a ported 21, if you are hitting 120db in your space.. you will know it from your ears.... with the Dev, your ears may not think it's that loud but your body will know. Not just from the midbass punch but the whole experience.... in summery, 120db ported and 120db from a 6th order bandpass box are two VERY different experiences.
System integration: EVEN
Ease of build: PORTED
.... now a Dev is not harder at all.. it just takes longer to do.
Like I and others have said..... just build it.... worse case.... remove the front panel and you are back to a ported box again.
I hope this helps..