So It`s Ok To Mix and Match Ported and Sealed Subwoofers ??

As if integrating the subs into the room and to your current speakers, you now want to add a significant and bigger new dimension.

I would suggest rather than going your current route:

1. Get your room appropriately treated.
2. Get 1 or two identical subwoofers
3. Use the room correction in the subs or in a pre like the new Anthem lines to integrate the subs with your existing speakers for you.
   

It is quite possible that the room openings will severely improve your overall bass smoothness, making the necessity of multiple subs unnecessary, and that with precision settings you can get to done easily.

Best of luck,

E

Erik..
On point 1:
I have a decent amount of room treatments in place already, multiple panels of 2"  and 4" Owens Corning DIY plus corner traps...Massive improvement ! and yes that`s a great suggestion.

On point 2:
Are you are suggesting that I top out at 2 maybe 3 subs total and that it doesn`t matter wether sealed or ported ?

On point 3:
That sounds good

 

As I understand it, the thinking of 4 subs is not about volume but room integration.

It's not a terrible approach, but IMHO among the most wasteful. With a good room, precise integration, even 1 sub may suffice.

It is the "precise integration"  that troubles most people, and a reason for the 4 sub solution. It kind of eliminates the need for so much measurement, alignment, etc. The Anthem, JL and Dirac systems do an amazing job of measuring and calibrating this for you, far better than previous systems, IMHO.

Also, if your current speakers are ported, plug them before subbing.

Best,

E

This article does a good job of critiquing approaches to a bad room:

https://www.soundandvision.com/content/are-you-putting-subwoofers-behind-viewer

But if you already have effective bass traps, open walls, and have an effective EQ stratejy, such as room correction, you don't even have to have 2.

Very risky scm taking advice from one of the least knowledgeable on this subject on the whole site. DYODD.

The Audiokinesis Swarm are ported, yes, but all come with plugs. Plug a port and it becomes a sealed speaker.

There's nothing magical about ported/sealed. Its simply a tradeoff made between efficiency, extension, and cabinet volume. Briefly, ported speakers tend to have a response curve that is more efficient at higher bass frequencies, but then falls off rapidly past a certain point, the tuning frequency. Sealed cabinets have a lower efficiency but fall off more gradually. So plugging a port has the effect of reducing bass output at what tends to be a more problematic range due to room reinforcement, while also allowing a little deeper bass thanks to the more gradual rolloff. 

Two of my 5 subs are sealed. Two are ported. One, Talon Roc, is isobaric and ported. Isobaric is when two drivers are mounted together such that they both move the same air together. Anyway, point is, it is perfectly okay to mix. Often times in fact it is preferable. 

Watch who you take advice from around here. Remember, there's no editors, and anyone can post.