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-   -   Empty boxes need a 18” sub (https://www.avsforum.com/forum/155-diy-speakers-subs/3050820-empty-boxes-need-18-sub.html)

Audiophile75 02-16-2019 09:49 AM

73 Attachment(s)
I have a couple of empty boxes that have a cutout for a 15” and now I want to drop in an 18” for no good reason. The boxes are 7.5 cuft tuned at 18hz (dual 4” ports 23(?) inches long) that were designed for a Dayton 15” HF.
1. My very first thought was if I put in a bigger driver will my ports keep up without chuffing?
2. Because these would be subwoofer number 5 and 6 for the rear of my room and would be more of a room filler sub is there a 18” sub you could recommend?
I already have two f-20’s up front and two VBSS nearfield so I’m thinking that ultimax’s would be super over kill (?) which means I guess I’m looking for maybe a more affordable driver that does not sacrifice sound quality too much.

markg35 02-16-2019 10:36 AM

How about the Dayton HO series.They work better in that size box compared to the Ultimax.

Sorry,just read the affordability part in your post.

BigJake82 02-16-2019 12:30 PM

Quote:

Originally Posted by Audiophile75 (Post 57612224)
I have a couple of empty boxes that have a cutout for a 15” and now I want to drop in an 18” for no good reason. The boxes are 7.5 cuft tuned at 18hz (dual 4” ports 23(?) inches long) that were designed for a Dayton 15” HF.
1. My very first thought was if I put in a bigger driver will my ports keep up without chuffing?
2. Because these would be subwoofer number 5 and 6 for the rear of my room and would be more of a room filler sub is there a 18” sub you could recommend?
I already have two f-20’s up front and two VBSS nearfield so I’m thinking that ultimax’s would be super over kill (?) which means I guess I’m looking for maybe a more affordable driver that does not sacrifice sound quality too much.

A PA460 would work in that box pretty well, it would be similar to VBSS performance.

bebb 02-17-2019 12:47 PM

1 Attachment(s)
Quote:

Originally Posted by markg35 (Post 57612438)
How about the Dayton HO series.They work better in that size box compared to the Ultimax.

I disagree. They appear to work about the same in the size box according to WinISD modeling.


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