Originally Posted by Oklahomie
From a space perspective, I should have enough room for whatever I want - up front and throughout the room.
Would 4 ported SI HT18's and 4 ported PA 460s up front behind the AT wall and then some near fields throughout be solid?
Any suggestions for near field subs?
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I dont know, how big of a bass head are you? Most people 8 18s would be way more than enough and other people it is just a start. You really wont know until you get things built and see for yourself. You kind of get use to the bass also. LIke you might go hear someones setup with 2-4 18s and be BLOWN away. But then if you have the same setup and hear it day after day some people get use to it and want more. But then you see people on here happy with 1 15" subwoofer.
From the vibe I get from you I take it you have HIGH expectations. So 8 18's is probably a good start. Only time will tell.
I see you talk about wanting output down to 15hz. I really don't know if the 4 PA460 are going to add much. I mean it is not like you will be listening very often to 135dB at 60hz+ but I would bet there be more times you want to hear the 15-25hz range at 120db.
8 SI HT are going to give you as much midbass as you need in relation to the deep bass I would think. Maybe make a post asking guys that have 8 18" HT home theater subs of they feel they could use more midbass and see what they say.
I have never had that so I cannot speak from first-hand experience but I think you would have midbass covered in spades with 8 SI HT18. That is a LOT OF FREAKIN bass in all areas LOL, low, mid and upper bass.
It really is hard to give advice because I love the sound of the pro audio woofers but I am mostly music. But there was a time not too long ago I added the UM18 sealed in nearfield behind my seat and had a Seaton Submersive up front and a XS30 in the front stacked and I was VERY happy with that all around for music that went into the teens all the way up to the midbass it sounded and "felt" great to me.
But then a couple weeks ago I added the B&C 18TBW100 back in on top of the UM18 near-field and it added another element to the bass and I really do love the sound and IMPACT from the PA driver like the B&C but even the sealed subs get me 90%+ of the way there.
So in subwoofer equivalent, I have right around 3-4 18" in my room currently taking out the B&C and I think most people would be pretty happy with it output wise. But the near-field added a LOT and I am also on a supsended floor so the near fields can be a "trip" literally bouncing my hand off of the side table I use as my mouse pad on low bass hits.
So long story I think 8 SI 18 you would be impressed and very happy with. Look at
that is guy is a FREAKIN basshead and 8 SI are enough for him(or is it 9?). I think you would be better off with all SI over the added in 460s looking at the output # in WINISD. I know I am contradicting myself from earlier when I said to mix them, just trying to take everything into account.
But I know WINISD is not as accurate compared to hornresp because of inductance. Maybe get someonethat is good with hornresp like
@diy speaker guy
to model the SI HT 18 vs PA460 in hornresp because they know more about lossy inductance and they can give you a more accurate prediction on real-world output. Maybe the SI HT 18 won't have as much output in the midbass as WINISD show when it has the lossy inductance accounted for.
As for nearfield. I like sealed because it can be a smaller enclosure and easier to make fit but ported can be a little better for tactile feel around port tune. I would use the SI HT 18 for nearfield.
Sorry, I can't be of more help I know some but I know there is a lot I do not know other here will be able to give you more accurate info. I don't want to lead you astray. Plus a lot of what I say is my opinion based my experiences, so take it with a grain of salt.