Enclosure size correct

[sweety 10+ year member]

I've had a little play about with the RE box calculator & wondered if this is the correct volume or if RE is out a bit as i've been told it could be, what i'm looking to build is an enclosure of around 1.41ft^3. I've set the port at 1.75" wide should it be wider or is this size ok ?

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[sweety 10+ year member]

Any advice & can someone tell me if the volume is correct please as i'm wanting to start building the new enclosure

 

[bubbagumper6 5,000+ posts]

15.3 sq in of port per cube is good, tuning is a bit high for my taste but that's a preference thing, as long as the size is reasonable to RE's recommendations I'd say you're good to go.

Personally I always use WinISD for designing & modeling my enclosures.

 

[sweety 10+ year member]

Cheers for you input bubbagumper6:veryhapp: i'm going to be using my JBL GT3 10" & need 1.41ft^3 (40litres) for this sub to work in a ported enclosure. My biggest worry is if the volume is correct or if it's out by much (smaller or larger) I've tried WinISD but just couldn't get it to work for some reason, tried adding the data for the sub but couldn't go any further for some reason & in the end I just gave up on it

 

[bubbagumper6 5,000+ posts]

Cheers for you input bubbagumper6:veryhapp: i'm going to be using my JBL GT3 10" & need 1.41ft^3 (40litres) for this sub to work in a ported enclosure. My biggest worry is if the volume is correct or if it's out by much (smaller or larger) I've tried WinISD but just couldn't get it to work for some reason, tried adding the data for the sub but couldn't go any further for some reason & in the end I just gave up on it

Yeah I find a lot of times it complains that the TS parameters for a sub don't agree with each other, there's a little guide somewhere with how to get around that. Mainly you just input a few of the most important ones and let WinISD solve for the rest of them. I just threw em in and got it to work. When you start a new project it automatically plots the "optimal" enclosure and it looks like you may want to go a bit larger and a bit lower in tuning. Only drops 1/2dB over to get a better low end response.

Grey is your planned enclosure, yellow is the one WinISD came up with. I can send you the driver file so you can model it yourself if you like.

Response Curves

 

[Da64u 10+ year member]

Yeah I find a lot of times it complains that the TS parameters for a sub don't agree with each other, there's a little guide somewhere with how to get around that. Mainly you just input a few of the most important ones and let WinISD solve for the rest of them. I just threw em in and got it to work. When you start a new project it automatically plots the "optimal" enclosure and it looks like you may want to go a bit larger and a bit lower in tuning. Only drops 1/2dB over to get a better low end response.
Grey is your planned enclosure, yellow is the one WinISD came up with. I can send you the driver file so you can model it yourself if you like.

Response Curves

Hey, I'd be happy to see that guide if you can find it. I have 2 Obsidian Audio 12v3's in 4 cubic feet tuned to 33hz 6 inch port and they don't hit hard like I thought they would, maybe the program could help me out?

 

[bubbagumper6 5,000+ posts]

Hey, I'd be happy to see that guide if you can find it. I have 2 Obsidian Audio 12v3's in 4 cubic feet tuned to 33hz 6 inch port and they don't hit hard like I thought they would, maybe the program could help me out?

Yeah the only link I found earlier was dead but basically WinISD will tell you a group of parameters doesn't agree so if you delete your entry for one of them and let WinISD calculate it everything should be kosher.

Most of them come out to be just a tiny bit off, like a value will be 4.0 but WinISD will calculate it to be 3.85.