Ok.
We'll see what comes up in the next day or so.
It is simply that I thought there may have been real basic general rules that builders of tapped horns know about, that was not mentioned in this thread as it WAS one of those real basic general things that builders of tapped horns know about!!!
If you all followed that haha.
To whit, (example only) 'line the box with a very thin layer of foam/glass/whatever just to rid the faint echo sound'....or maybe......'never line the box with anything'.
See? I just don't know, and it was not said one way or the other in the thread. In any case yes paul, there is a lot of eq available for these and yes, basically any top will be gone.
Cannot remember if I told you?? (just for background, and hence the little laugh we had before) Paul has been helping me design a 6th order bandpass. I did particularly want the classic BP response for what I was doing.
We worked out the design yada yada so I could take the four drivers I already have in a solidly built sealed enclosure and put them into the BP box that I had to build. As you can guess, complicated and a lot of work.
Duhh, and it is embarrassing when you realise how long it took you to think of it....I simply got back my DEQ I had lent to someone else-who was not using it anyway-and now I can dial in the perfect (better actually) bandpass response using the sealed boxes already sitting in the corner!!
No extra work, no building new boxes.
What an idiot.
So now build two of these fellas, fully eq'd as the front subs, the four*xls tens per box can then go as 'surround subs'. Will see how it sounds, but current plan is to run the 'rear' subs say 6db lower, but also delayed by twenty feet or something. <Might sound good, might sound crap, we'll see.
IIRC, there is a paper written by david greisinger about using subs to the side....will have to do a search. Hopefully one of you might know what this vague memory I have is and provide a link.