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Old 12th January 2011, 11:03 PM   #111
AndrewT is online now AndrewT  Scotland
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I think I have it.
The reported power input relates to the input voltage and the speaker electrical impedance at that frequency.
When the frequency hits a peak in the electrical impedance, Hornresp reports a high efficiency and when frequency does not coincide with a peak then Hornresp reports a lower efficiency.
Is that correct?
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Old 13th January 2011, 12:30 AM   #112
fb is offline fb  Australia
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Bjorno,

How does the mouth of a T-TQWT compare to the port of a vented box with regards to port compression/chuffing?
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Old 21st April 2011, 01:46 AM   #113
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I am building one of these and I was wondering a few things. I plan on making the outside baltic birch and I was wondering if it would be okay to use 3/4" subfloor ply for the inner baffles. I was also wondering if the dampeing material had been sorted out. I have some 1" egg crate style acoustic absorbing foam, would that be useable? And that last thing, what is everyone using as a highpass?
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Old 21st April 2011, 09:32 AM   #114
bjorno is offline bjorno  Sweden
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Hi all,


Maybe too delayed answers but there is a reason why I haven't posted in time :Computer problems..

Andrew T: post#111


Quote:
When the frequency hits a peak in the electrical impedance, Hornresp reports a high efficiency and when frequency does not coincide with a peak then Hornresp reports a lower efficiency.
Is that correct?
b: Yes

fbost# 112

Quote:
How does the mouth of a T-TQWT compare to the port of a vented box with regards to port compression/chuffing?
b : If the terminating port is large enough, i.e. Port is >= Sd/3 : No chuffing is expected.


lightlinked: post# 113

Quote:
I am building one of these and I was wondering a few things. I plan on making the outside baltic birch and I was wondering if it would be okay to use 3/4" subfloor ply for the inner baffles. I was also wondering if the dampeing material had been sorted out. I have some 1" egg crate style acoustic absorbing foam, would that be useable? And that last thing, what is everyone using as a highpass?
b:

Hi,

Which Driver/Plan are you following ?


b
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Old 21st April 2011, 05:52 PM   #115
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I'm using the lab12 and the 5.5 meter design by Don Snyder. So far I have the outside pieces cut, I also have the driver and all the wood, so this might be glued up by Friday. I was also thinking of using 1/2" subfloor for bracing.
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Old 4th May 2011, 05:07 PM   #116
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i'm about to build this i have the perfect amount of space under my TV for it and i have the lab 12. just figuring out a cut sheet since i didn't see one posted here. i'll post up pics in the process!
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Old 4th May 2011, 07:08 PM   #117
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It took me two sheets of 5' x 5' x 3/4" baltic birch, 26" x 48" x 3/4" of underlay ply for the inner baffles and a chunk of 1/2" subfloor ply for bracing. If you use biscuits, the inside ones have to be layed out perfect or the side will not go on easily.
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Old 5th May 2011, 02:12 AM   #118
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damn that bracing looks crazy! i didn't use any bracing on mine, i just used 3/4" mdf for the whole project.
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Old 5th May 2011, 02:21 AM   #119
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i banged it out a lot faster than i expected...i figured i'd just go buy the wood today and get started on it..but here it is! just gotta sand and paint, and make an access panel cover!

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Old 4th June 2011, 03:36 PM   #120
nuconz is offline nuconz  United States
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Default Driver substitution for Eminence

any chance the CSS Trio 12 might be substituted for the Eminence Lab 12 driver?
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