Single sheet TH challenge

[fhperez]

The Reception Rooms: The Gardens of Houston, Texas

Here's a link to the ballroom's website, I was in the Grande Ballroom, my DJ Friend was in the Garden Room...

If you look at the pictures at the top of the page, the one showing a fountain, you can see the room I was in is on the right and the room he was in is on the left... There is about a 10' wide hallway in between the two rooms...

[jbell]

Originally Posted by fhperez

When the dance floor was full (about 100-150 people) I walked to the other side of the dance floor to hear how everything sounded...

I feel the EV's Lost a little umph but, surprisingly I felt the subs gained some... I could feel the bass through all those people dancing... It may have been the song, it may have been me... but I was surprised...

I mean, these are 4 EV's running at approximately 1,200 watts a piece with 2" compression drivers on them!!!

makes perfect sense.... subs aren't the only type of speaker to suffer from power compression. Coil heats up, spl goes down. 98db efficiency tops, 104db efficiency subs, more power going into tops vs going into subs -- the tops suffer more power compression. It's that efficiency that gets you to 1am.

Well, that, and people absorb a lot of high end, and bass kinda goes right through...

Glad you are happy with them, that puts a smile on my face.

[Chaps]

Wow, sounds very nice fhperez! .. Does the 12mm box feel rugged enough for alot af mobile use? I ask since i have allways been told that subs should be made of 18mm to be solid enough for alot af moving around.

Jbell:
I'm just looking through the cutsheet and everything, but there is something that confuses me. I think you can help me out.

On the cutsheet, there is no shown boards for bracing (from the back to the bottom and top, as i can see on your building pics), but there is a 2,5" board, witch according to the design sketch, should be used as a reflector in the back-upper corner.
Now, all i can think is, that instead of reflector, you have used the 2,5" for the bracing? - but then i look at your picture (post #54), with all the wood has been cut, and there is both the 2,5" board and another called "brace".

I hope you understand what i'm trying to ask you

Edit:
Now i see, that the 2,5" reflector board has just "moved" from the back-upper corner, to sit between the 11" and the 13,5" board.
Then i just need to know where you got that board for bracing from? I just can't figure it out

[Dan Linsley]

Chaps: I'm thinking of building these as well and just scratched by head about that 2.5" piece now that you mentioned it. The 2.5" piece in the cut sheet is 48" long, 21" of it will be the reflector, the rest can be used for bracing.

[Chaps]

Originally Posted by Dan Linsley

Chaps: I'm thinking of building these as well and just scratched by head about that 2.5" piece now that you mentioned it. The 2.5" piece in the cut sheet is 48" long, 21" of it will be the reflector, the rest can be used for bracing.

Ahh, well spotted! .. I knew i had overlooked something
Thanks!

[fhperez]

Originally Posted by Chaps

Wow, sounds very nice fhperez! .. Does the 12mm box feel rugged enough for alot af mobile use? I ask since i have allways been told that subs should be made of 18mm to be solid enough for alot af moving around.

I don't know, it's not heavy, and since they are white, I have to take super extra care of them... They feel good enough to me to resist the loading and unloading...

[fhperez]

Jbell

Quick Question... If we were to make these to 22", 23", maybe even 24 inches internally, for me, who will be making maybe 2 or 4 and be happy with them for a 'long' time, then I could reach levels of 40hz with 1 box, or does with have to be at 21" for this design to work?

Having Said that, if I do build two more, tuned to 40hz, a wider version, could I use all 4 together, or would you advice against that?

[jbell]

Originally Posted by fhperez

Jbell

Quick Question... If we were to make these to 22", 23", maybe even 24 inches internally, for me, who will be making maybe 2 or 4 and be happy with them for a 'long' time, then I could reach levels of 40hz with 1 box, or does with have to be at 21" for this design to work?

Having Said that, if I do build two more, tuned to 40hz, a wider version, could I use all 4 together, or would you advice against that?

Making them wider doesn't make them play lower. If you want lower, more cabinets accomplishes that. (to a point)

This means that for small gigs, bringing 2 or more is still advised even if you don't need the spl.

If you really want a lower design, and you don't care about fitting it out of a single sheet, I can mod it to make it play a little lower.. Keep in mind loud and low are the 2 players on the see-saw. As one goes up, the other goes down.

Here's the idea of what would be needed to make it actually go lower. (warning -- there is NO hornresp or other thought put into this, it's just a depiction of what would be needed to make the horn path longer, and therefore play lower)

[4pyros]

Jim; How would the LAB15 work in this box? Andy

[jbell]

Originally Posted by 4pyros

Jim; How would the LAB15 work in this box? Andy

not as well as the 3015lf....