file Eminence 18 Scoop

10 years 5 months ago #6000 by tony.a.s.s.
Replied by tony.a.s.s. on topic Eminence 18 Scoop
The problem with trying to tweek a speaker cab is that you are dealing with a fixed science. If you could change the air molecules like you can change the fuel in a car, you might get somewhere. Speed of sound , wavelength etc. are things we can do nothing about. Thats why I maintain that with a given size, irrespective of internal juggling, you won't improve much from one cab to another. The chassis speaker and the amp can make more difference to the sound than small internal changes.

Peace and goodwill to all speaker builders

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10 years 5 months ago #6004 by nickyburnell
Replied by nickyburnell on topic Eminence 18 Scoop
That just leaves the fun bit then :lol:

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10 years 4 months ago #6115 by deadbeat
Replied by deadbeat on topic Eminence 18 Scoop
I agree with tony.

I wasn't just being unhelpful when I posted a picture of an old man (Helmholtz) in the scoop forum on the other side!

[url=\"http://users.ece.gatech.edu/~mleach/beraneklaw.html\"]Beranek\'s law[/url]
\'bits of ply round a driver\'

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10 years 4 months ago #6117 by nickyburnell
Replied by nickyburnell on topic Eminence 18 Scoop
To be honest I think lot of this science is bollox.
There is a problem, peoples idea of what sounds right/good is subjective.
One of the biggest problems I have with my wifes chosen art of showing ponies is the judging. Some judges like certain styles, certain bone, certain colours. Other judges like the opposite, it's the make up of their personality. A show jumper on the other hand either knocks fences down or not.
Same goes for sound, it's not and can never be a fixed science, you can only make it sound right to you. So adding tiny bits to a design that's , "Played out" can and does make a difference to the individual. IE: Making it flat in respose is seen as correct, sounds benign to me, I like spikes at the frequecies that make me buzz, etc etc......
IMHO of course

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10 years 4 months ago #6132 by nickyburnell
Replied by nickyburnell on topic Eminence 18 Scoop
Gotd I thought that would have 'em all spitting feathers.
Oh well, I take it back smiley4

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10 years 4 months ago #6133 by levyte357
Replied by levyte357 on topic Eminence 18 Scoop

nickyburnell wrote: Same goes for sound, it's not and can never be a fixed science, you can only make it sound right to you. So adding tiny bits to a design that's , "Played out" can and does make a difference to the individual. IE: Making it flat in respose is seen as correct, sounds benign to me, I like spikes at the frequecies that make me buzz, etc etc......
IMHO of course


Yes. All scoops (except HOG) descend from either the Fane, Eminence or JBL.

If enough people hadn't tinkered with the designs, extending their shelf life, we wouldn't have Big manufacturers desiging drivers primarily for scoops.

\"When in Vegas, do as the vegasians do\".

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10 years 2 months ago #6334 by lenny b
Replied by lenny b on topic Eminence 18 Scoop
would it make a difference if you kept the chamber the same and just changed the first 45 degree brace in your plan to parrallel the upward flare?

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9 years 11 months ago #6745 by bitzo
Replied by bitzo on topic Eminence 18 Scoop
I modelled the eminece scoop pd1850 loaded in akabak in 2 way.
One with the original plan, negative expansion simmed like a duct, and one with modded plan by Levyte357.
plot @1w@1m@2pi



I'm starting to model supers, and some mammals smiley2 I've found the old jbl (I think could be) plan on the TDA database, but there's not width, someone have more infos please?

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9 years 11 months ago #6766 by jake_fielder
Replied by jake_fielder on topic Eminence 18 Scoop
Nice one, could you post the script in the akabak thread please mate?

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9 years 11 months ago #6814 by bitzo
Replied by bitzo on topic Eminence 18 Scoop
done smiley20

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