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Author Topic: Top Project  (Read 25539 times)

jeffhtg (Jeff Kenney)

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Re: Top Project
« Reply #20 on: December 21, 2004, 04:40:56 PM »

why 80hz? the labs play very well up to 100-if not 110 (altho i dont like the voices getting into my subs so i usually cross them at 100ish.

Anyways.. i've heard a couple boxes that seem to fit well with the lab.. Zannenclosures makes some nice 18sound boxes - its a folded horn 15" with a 10" mid and 1.5" compression.

of course the kf850's sound great ($$$)

what about unity horns?? i havent heard tom danleys boxes but im sure they rock.. lambda acoustics made a horn that went down to 300hz (4 mids + a compresssion driver).. apparently they are out of business but damn i bet if we could get ahold of that unity horn it would sound kickass with 15"! I tried to get yorkville to sell me the horn lenses but they said no.. Tom probably has some patent on his stuff so we cant copy it? someone has to sell lenses for just the mid/highs right?? is it not possible to use the lambda horn? was it a illegal copy of your design tom?? input input! (and no i cant affoard the td-1 altho if i could i would! Heh)
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michiel

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Re: Top Project
« Reply #21 on: December 22, 2004, 11:49:10 AM »

I think a top cab for the lab must go down to minimun 90 Hz. I you want the best sound from tha lab, you will have to cross low.
The top must have a high ouput in the lower regions. And thats the difficult for an good top wich will work with the LAB.

I have worked with on a diy top wich looks likes the F1 res9. But never build it. I'm also working with the same idea as the KF 750, but i have to run some test before i can say more about this principe (and i don't have the money to build a proto cabinet Sad ).
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Christopher Myers

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Re: Top Project
« Reply #22 on: December 25, 2004, 10:55:49 AM »

I have a question that's kinda off topic, but since it was mentioned above, I didn't think it would be a problem.  

How would I go about creating a compression chamber for the Porn-Horn?  I'm able to comprehend and do all of the math for it and find a sufficient driver and whatnot, but how would I construct one?  

Also, I know they went out of style a while ago, but Perkins Bins have horn-loaded fronts and vented rear chambers.  Any insight as to how this works/in what situations this is advantageous?

So the main point I'm summing up to is, will the Porn-Horn work well in a Perkins Bin type configuration? (I know you're going to ask for what kind of application... general low-mid to mid coverage, not necessarily with labs, but horn-loaded subs in general).

Merry Christmas everyone
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Chris Myers
Tangent Productions, LLC

jeffhtg (Jeff Kenney)

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Re: Top Project
« Reply #23 on: December 25, 2004, 11:56:41 AM »

I think the biggest problem is your not going to get good lows with the porn horn - it only works down to 130hz - that leaves a small gap of 30-40 hz right? sooo is this acceptable? will the horn actually play down to 100 and just not sound great? is this a freeair horn? if not what size is the rear chamber (is that the compression chamber you speak of?) anyone use these horns on anything else? I think im going to start a porn horn thread heh.

still waiting on any response if we can use some sort of unity horn configuration. I like the td-1 very nice but to expensive. I like the yorkville but its a direct radiating 15. can we buy unity horns  and use them in our own box with a horn loaded 15? i mean jeesh the thing only needs to play 100-300hz right.. perhaps a manifold design?  Tom why wont yorkville sell me the unity horn - can we buy it from anyone?


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Phil Pope

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Re: Top Project
« Reply #24 on: December 25, 2004, 01:01:18 PM »

I haven't plugged my sig gen through my Lab yet but it sounds OK crossed over at up to 150Hz to me.  The measured response I have seen posted here show decent output up to 200Hz meaning that you can crossover at 1/2 octave below this at a push?

I am currently working on a straight dual 12" horn that will be excursion limited at about 100Hz and got up to about 500Hz.  It is 1 meter long, mouth area half that of a LAB sub, and throat of 400cm2 with a rubber throat taking it down to 250cm2 to boost HF output a little.  anyone tried a similar design before?

Phil
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jeffhtg (Jeff Kenney)

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Re: Top Project
« Reply #25 on: December 25, 2004, 01:07:22 PM »

500hz is kinda low.. you should be able to get up to at least 1.5k with a 12" - this would cause problems unless your planning on going 3 way. and yes the labs will play up that high.. but it sounds kinda funny when you got mids commin from your subs.. voices start getting more noticable at 120hz.. at 150 hz alot of instruments start getting into your subs.. at 200hz they just start sounding plain wierd.
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jeffhtg (Jeff Kenney)

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Re: Top Project
« Reply #26 on: January 04, 2005, 03:27:51 AM »

well ive had a good 2-3 weeks with 8 labs in a new install.. As most people have said on here - i have lowered my crossover points lower than originally anticipated.. I started at 125 and ended up around 90hz with a 6db slope. using tootalls filter recommendations and it sounds great there.

something funny about the labs in the 100ish - they just dont sound good to me at all there.

let me just say that 8 labs sounds f*ing incredible.. if anyone is ever in orlando - look me up and ill guestlist you so you can hear them Smile oh and the qscmx3000's sound better than crown vz5000's

now this really puts a damnper on my new top project.. I think i might just bite the bullet and go with the yorkville unity.. Im going to have a local dealer bring in a pair so i can listen to them. I was really looking for an "all horn" design.. but it gets too expensive everyway i look Sad
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David Trotter

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Re: Top Project
« Reply #27 on: January 04, 2005, 08:26:18 AM »

You want to build some HD15's mate. They're the easiest cab to build ever. Took me 4 days to build, paint and finish 4 of them. only cost
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jeffhtg (Jeff Kenney)

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Re: Top Project
« Reply #28 on: January 04, 2005, 11:00:35 AM »

what kinda tops are in 'warrens rig'
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Branson Sagear

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Re: Top Project
« Reply #29 on: January 04, 2005, 03:13:35 PM »

jeffhtg wrote on Tue, 21 December 2004 15:40



what about unity horns?? i havent heard tom danleys boxes but im sure they rock.. lambda acoustics made a horn that went down to 300hz (4 mids + a compresssion driver).. apparently they are out of business but damn i bet if we could get ahold of that unity horn it would sound kickass with 15"! I tried to get yorkville to sell me the horn lenses but they said no.. Tom probably has some patent on his stuff so we cant copy it? someone has to sell lenses for just the mid/highs right?? is it not possible to use the lambda horn? was it a illegal copy of your design tom?? input input! (and no i cant affoard the td-1 altho if i could i would! Heh)



Yes, Lambda Acoustics is out of business, but their drivers are now being built by AE Speakers.  I know this, because I'm an engineer at this company. (I was really really hoping there might be a couple pairs of left over unity horns when we bought the remaining parts stock, but...  I have bad luck...)

But anyway, Lambda Acoustics version of the unity horn, was designed to be marketed as a home listening/home theater speaker, whereas SPL was marketing them to the sound reinforcement world.  SPL decided to start marketing for home theaters (see runt...) when Lambda Acoustics went out of business.

The only way to get anything with a unity horn, is to buy a SPL product, a Yorkville U15, or a close copy(steal  mmhmm...  eaw 730  mmhmm.....  look at a SPL C^3 sometime...)

Just thought that I'd throw that out there to clear up any confusion.

Branson Sagear
AE Speakers Professional Division
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