A sub that's 1460mm or more in length. :)

As above

1460mm long, by 580mm deep,

Twin 18" if possible, any ideas welcome :)

Ask PauliePaul, they had some huge double 1850s reflex back in the days...
Remember some pics on here but cant tell you which thread etc..

Stretched BPHs might be easy to calculate/adopt aswell?

Build a double Rhino or other mini-scoop? From what PauliePaul told me that would be more like what his 2x18's were, they were more complicated than a reflex. A double mini would be a beast of a box SPL-wise and they're usually around 700 tall so the double would be around 1400 wide laid on its side. Probably a bit deeper than 580 though, more like 650.

can you pm me a link for your b&c drivers i will get siming in a 6th order bandpass and also in a larger bandpass sub if that would be suitable? working on same principle as the em15 just tuned alot lower longer horn etc would that interest you? could make it modular so easier to move or maybey walts module horn modified might suit what you are looking for? take it this is to go with the em15s and the selenium tops yes?????

Just saw this, but you have to understand that most Decware plans are created for home use and not so much professional use.

Hi
Understood that the majority of Decware designs are for home or car use, the exception is the imperial, if you read the articall on the site you can find reference to nightclub installs etc, the original imperial with a single 15 was used by king tubby in Jamaica, good enough for me, if you see the response chart this speaker kills all scoops stone dead.