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Old 30th August 2013, 10:14 AM   #1
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Default Labhorn

Hi, i know this topic have been up a couple of time, but i just couldn't find the information i needed.

I'm going to build 2 of these. and later build an additionally two.
i've been looking at the two lab12 driver there is, the original and now the new, lab12C ?
i was wondering if the new driver would be a better choice as it's a 4 ohm, and thereby will be more flexible when it comes to choosing an amplifier to fit.

has anybody tried the new driver, ? i also see that it's not quite as sensible in the bottom end as the older, but does it make a big difference ?

http://www.eminence.com/pdf/LAB_12.pdf
http://www.eminence.com/pdf/LAB_12C.pdf


Regard, Jonas
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Old 30th August 2013, 11:15 AM   #2
AndrewT is online now AndrewT  Scotland
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6ohms requires slightly less current than 4ohms. This makes the job of the amplifier easier.

Flexibility is not an issue.
Any 4ohms or 6ohms capable amplifier will drive the original 6ohms driver.
Only a 4ohms capable amplifier is able to drive the new 4ohms driver to similar maximum outputs.
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Old 30th August 2013, 04:33 PM   #3
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Quote:
Originally Posted by kaae View Post
i was wondering if the new driver would be a better choice as it's a 4 ohm, and thereby will be more flexible when it comes to choosing an amplifier to fit.
Jonas,

The Labhorn minimum impedance is very close to the loudspeaker DC resistance.
A pair of the standard Lab12 in parallel will present a minima of around 2.15 ohms, with a pair of 12C at 1.55 ohms many pro amps will current limit and reduce available power.

The Lab 12C seems aimed at the auto market, where the low impedance translates to "more power" per speaker.

I see no advantage to using the Lab12C in a Labhorn.
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Old 30th August 2013, 05:01 PM   #4
wg_ski is online now wg_ski  United States
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By "labhorn", do you mean the original design or the new single driver tapped horn being discussed here now? There was some confusion on that recently.
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Old 30th August 2013, 05:41 PM   #5
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Originally Posted by wg_ski View Post
By "labhorn", do you mean the original design or the new single driver tapped horn being discussed here now? There was some confusion on that recently.
I'm assuming by Labhorn the OP meant the Tom Danley design posted on the LAB (Live Audio Board) for which the LAB12 was specifically designed for.

Both the original LABhorn, the PAL12 single TH, and pretty much anything else the Lab 12 is put in will exhibit an impedance minima very close to the rated DC resistance (Re).
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Old 30th August 2013, 07:21 PM   #6
sine143 is offline sine143  United States
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series wired ftw. . danley says if you blow one woofer in a labhorn they'll both go, so you might as well series them (if you blow one, you'll DEFINITELY blow the other), and then one big boy amp can power 3 a side easy, (if it can do 1500 watts per side at 8 ohms your good to go).
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Old 30th August 2013, 11:43 PM   #7
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You do realize how big the original LABhorn cabinet is correct?
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Old 31st August 2013, 10:01 AM   #8
AndrewT is online now AndrewT  Scotland
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~600litres.
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Old 31st August 2013, 10:58 AM   #9
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Thanks, i think i'll go for the lab12 driver then
And yes, it is the Tom Danley Design i'm aiming for,
i've got an mackie j2500 for powering them, so for now there will be plenty of power with one labhorn pr side in 2 ohm. with the drivers in parralle.
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Old 31st August 2013, 03:11 PM   #10
Zero D is offline Zero D  United Kingdom
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4 x 600ish liters. That's some real estate right there ! Hope you've got a crane

Are these for home or ?

Anyway should be cool
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