Fane 12-250TC or 15-300TC in a large sealed enclosure

[Steve Cresswell]

That brace looks solid. If it is, you have lost half the cabinet volume.
When I said the brace doesn’t have to be holey, I was under the impression you were wanting to use an open brace ie like a picture frame with no picture in it.
You need to cut/ drill some holes in the brace.

 

[BrockLanders]

My jigsaw was not out yet, I just tried the brace for size

 

[Steve Cresswell]

My jigsaw was not out yet, I just tried the brace for size

Thank God for that!

 

[BrockLanders]

Steve - one more question. I was planning to use damping similar to your project, that is only lower half of the cabinet (but not wool like yours, just simple polyfill). But my rear wall plywood surface is laminated with some kind of "film" (got it really cheap, that's why I bought it ). So will this affect the sound and should I cover it with polyfill to to avoid negative effects? This will be the part that will be exactly the opposite of the driver.

 

[Steve Cresswell]

I wouldn’t have thought that the surface composition of the plywood, opposite the driver would affect the sound. Covering it with polyfill certainly wouldn’t do any harm.

 

[BrockLanders]

I weighed the whole speaker. Without driver it's 28.2kg, crazy heavy!

 

[waxx]

I don't know how you did deal with that treble rise problem, but i'm busy with one for myself, and designed this correction filter (on a measured 80L box of a friend with the 12-250TC). He uses this box with an active crossover and a sub for outdoor in his garden.

I don't have the driver yet, nor the speaker. I've been to busy with other stuff the last months to get to this, but this winter i will build mine and it will be slightly larger box (120L) and this filter (or a variation of it ,) ).

 

[pelanj]

That looks good. I used mine with a sub for a garden party, too. It would be great if it was possible to acoustically disperse instead of EQing down. But I guess that is not too easy.

 

[norman bates]

you wont be able to disperse 1-4khz without messing up everything above that.

I've had luck sitting off axis and eq for it there.
That way it sounded better everywhere else in the room.


If you eq it flat dead on, there will be no highs except in a laser beam straight ahead of it (past 2k).

 

[waxx]

That looks good. I used mine with a sub for a garden party, too. It would be great if it was possible to acoustically disperse instead of EQing down. But I guess that is not too easy.

For outside, the eq is not needed as there is more dispertion (due to no walls), but inside where you mostly sit in straight in front of it the eq is needed otherwise it's to shouty. I've tested this with a minidsp with those speakers.

 

[KaffiMann]

Waxx, I have to agree with Norman here. They are a bit hot dead-on, but get just 5º off axis and it's another story. Please consider it before you start getting parts, I found that just adding a simple but decent quality steel grill helped distribute the top end "sparkle" somewhat, and just a semi-calculated spike of melamine foam dead centre. Then there's SubSoniks who's had good results making melamine foam lenses of sorts.

 

[BrockLanders]

Progress!

 

[swb502]

Brock,

Did you end up finishing this project? I wanted to know how it turned out.

Bill

 

[norman bates]

nice

 

[BrockLanders]

Hello!

Almost finished I will post pictures today evening. I am still having argument with my wife, now she thinks they are too big for the livingroom TV area and don't fit design-wise

 

[norman bates]

Well, she gets to design the whole house.

You get 1 thing, so make it the stereo.

Probably when you have it tweaked in, play her favorite cd, that seals the deal and all becomes ok.