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new 15" folded bass horns undercreation..
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dubsuction View Drop Down
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Joined: 18 August 2004
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    Posted: 29 September 2004 at 12:48pm

....now then all!

i've been away for a bit but am back and have started construction of the 4 new z folded long bass horn for PD 156.... the first one is pretty much done and hopefully the other 3 will follow shortly  

after much umming and ahhing bout what to go for and toying with scoop ideas i went for horn loading

the design was put together by timber_mg and i'm doing the buliding, will try to get some photos of production up here soon...stack of four models quite nicely on hornresp

.......watch dis'ya space

peace+respect-always
**HIGH PRESSURE SOUND SYSTEM**
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Rog View Drop Down
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Points: 2166 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Rog Quote  Post ReplyReply Direct Link To This Post Posted: 29 September 2004 at 1:15pm
So, do we get to see a sneak preview of the plans.
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dubsuction View Drop Down
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Points: 269 		Post Options Post Options   Thanks (0) Thanks(0)   Quote dubsuction Quote  Post ReplyReply Direct Link To This Post Posted: 29 September 2004 at 1:35pm

thought timber might have sent you a copy of them already man, i'll get em up and pm you a copy or summet! would be usefull to know what you think!

cheers

 
peace+respect-always
**HIGH PRESSURE SOUND SYSTEM**
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Timber_MG View Drop Down
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Points: 1454 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Timber_MG Quote  Post ReplyReply Direct Link To This Post Posted: 29 September 2004 at 5:18pm
<>Heya

I did a folding for the man and drew up some rough sketches. Because the dub crowd seems to want low, low bass, I folded a 2.2m long horn (which dubsuction cut down a bit) for the man. I kept it really simple (45degrees cuts throughout almost, fewer panels and a slightly compromised throat). I used WH Geiger’s hornfold excel spreadsheet for the folds, so I hope it turns (pun intended) out alright. The man will stack 4 of these I take it.

I lost my flash disk at a music festival somewhere the weekend after Phil got my second sketch, so I lost my scans of the sketches along with a fair bit of AES reading material that I am trying to get hold of again. Dubsuction has the horn parameters somewhere, I can only guess them (methinks 33Hz flare M=0.6 or thereabouts, a touch under 2:1 compression so St around 450, Sm originally 4000 square cm)

I would be just as interested to see what comes of this.

Martin
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Joined: 01 October 2004
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I used WH Geiger’s hornfold excel spreadsheet for the folds, so I hope it turns (pun intended) out alright. The man will stack 4 of these I take it.

W H geiger knows his theory!
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Points: 1454 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Timber_MG Quote  Post ReplyReply Direct Link To This Post Posted: 01 October 2004 at 11:11am
Are you the Mikee of Mikee 12345 fame? Good to see you on this forum (I'm the Martin from the Sony project if you remember) I am working on an 18" horn for my own use now as well, but have, like yourself, found most Pro drivers to require biggish rear chambers. Looking into the Beyma XMAX12 too ATM.
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dubsuction View Drop Down
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Joined: 18 August 2004
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Points: 269 		Post Options Post Options   Thanks (0) Thanks(0)   Quote dubsuction Quote  Post ReplyReply Direct Link To This Post Posted: 01 October 2004 at 11:50am

..ahhh...busy with lots of gigs at the mo.....still trying to get access to my mate didgi camera and scanner+ computer to get the plans and photos up as can't do this at work....hopefully over the weekend

cheers
peace+respect-always
**HIGH PRESSURE SOUND SYSTEM**
www.highpressuresound.co.uk
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Joined: 01 October 2004
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Points: 2744 		Post Options Post Options   Thanks (0) Thanks(0)   Quote tb_mike Quote  Post ReplyReply Direct Link To This Post Posted: 01 October 2004 at 12:54pm
Yep thats right,i hated that stupid mikee12345 name-everyone had already taken the name i want at diyaudio haha! recently i re applied and made it simply 'mike.e' .

yep i remember your multiple jbl1500 project!

If the horns already big,will another 60litres matter-apparently to the labhorn it did

Im doing a 2226 horn soon as i can(for the house),just deciding on 30hz,40hz or 50hz cutoff
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Points: 1454 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Timber_MG Quote  Post ReplyReply Direct Link To This Post Posted: 01 October 2004 at 1:26pm
Yeah, took v.2 to correct the rear volume. But I think the reasoning behind that was mechanical reliability more than the space saving (people expecting 1 or 2 cabs to operate down to 30 reliably). We're getting way off topic here now.
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Joined: 01 October 2004
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Points: 2744 		Post Options Post Options   Thanks (0) Thanks(0)   Quote tb_mike Quote  Post ReplyReply Direct Link To This Post Posted: 02 October 2004 at 5:25am
i know-i noticed this on 'Hulkss' modeling of the labhorn-too small rear chamber.
In my opinion - Tom D knew people would over power this sub. Telling people it could handle 1.4kw rms per box didnt help things when drivers broke from over excursion



Cheers!
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Timber_MG View Drop Down
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Points: 1454 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Timber_MG Quote  Post ReplyReply Direct Link To This Post Posted: 02 October 2004 at 2:45pm
Yeah, true. The power handling spec was given with a HP filter and a stack of 4/6 though, but most people seem to power them with 2kW per box, which is fine in stacks of 6 but a big problem with 1/2 cabs with a good helping of eq at the bottom. Hornresp predicts values so far beyond xdamage it's not even funny. Way OT now though.

We now return to the report of an as yet unidentified camouflaged object causing riotous behaviour amongst the masses.
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Points: 269 		Post Options Post Options   Thanks (0) Thanks(0)   Quote dubsuction Quote  Post ReplyReply Direct Link To This Post Posted: 05 October 2004 at 3:36pm

right dont know if this is gonna work.....hopefully there will be a photo here......
peace+respect-always
**HIGH PRESSURE SOUND SYSTEM**
www.highpressuresound.co.uk
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