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[Berti Jacobs]

Hallo all,

I took some specs from the Danley soundlabs website, could somebode fil in the LAB-subwoofer? LAB-subwoofer comparrisson.

Thanks, Berti


Model   max SPL   sens.   mag.response   rating   dimensions   weight
   (progr.)      (-3db ref.SPL)   (progr.)      
                  
TH221   145 db   109 db   22 - 180 Hz    6000 W   60x60x28   480 lbs
TH812   147 db   110 db    28 - 150 Hz   11200 W   60x60x28   480 lbs
TH412   141 db   110 db    33 - 200 Hz   5600 W   26,4x45x45   305 lbs
TH215   136 db   102 db   28 - 80 Hz   2800 W   22,5x30x45,7   200lbs
TH115   136 db   106 db   36 - 200 Hz   2000W   40x22,5x28,5   152lbs
TH50   130 db   97 db   21 - 70 Hz   2000 W   45x34x25   240lbs
1 LAB                   
   

[Ivan Beaver]

The size is easy 45x45x22.5

Weight is in the mid 200's (ish) depending on fit and finish.

There have been various measurements of the labs over the years, but I am not sure of any outside calibrated ones (that I have seen).

Maybe somebody has some.

[Berti Jacobs]

hmmm, Ivan
with you're experience, what about you're best guess?
I bet it will be within +/- 1db  /  3Hz
thanks,
Berti

[Silas Pradetto]

One LAB is a useless spec anyway as they're designed to be used in blocks of four or more.

How fast does your car go on one wheel. What?? It doesn't?

[Ivan Beaver]

Since the lab is designed to be used in groups to increase the mouth area, the low freq response will change depending on how many cabinets are used.

But a WAG is around 106dB with a 2.83V input and a single box -3dB is around 40ish Hz.

Multiple boxes will get to 35Hz or lower response (real -3dB as taken from rated sensitivity) and the response will smooth out quite a bit-not so many peaks and valleys).

I have never seen any labs measured correctly-outdoors, so those numbers are kinda interpolated for various indoor responses in less than idea conditions.

I would be interested to see how a properly built lab sub would really measure-in both singles-duo and quads.

Say outdoors-away from reflections-10M away, 28.3V input.

[Silas Pradetto]

Ivan Beaver wrote on Mon, 08 June 2009 18:30

Since the lab is designed to be used in groups to increase the mouth area, the low freq response will change depending on how many cabinets are used. But a WAG is around 106dB with a 2.83V input and a single box -3dB is around 40ish Hz. Multiple boxes will get to 35Hz or lower response (real -3dB as taken from rated sensitivity) and the response will smooth out quite a bit-not so many peaks and valleys). I have never seen any labs measured correctly-outdoors, so those numbers are kinda interpolated for various indoor responses in less than idea conditions. I would be interested to see how a properly built lab sub would really measure-in both singles-duo and quads. Say outdoors-away from reflections-10M away, 28.3V input.

Ivan, I'm expecting to do measurements like this for Art, so at some point in the next 10 years ( ) I'll have the results.

[Phil Lewandowski]

Silas Pradetto wrote on Mon, 08 June 2009 18:33

Ivan Beaver wrote on Mon, 08 June 2009 18:30 Since the lab is designed to be used in groups to increase the mouth area, the low freq response will change depending on how many cabinets are used. But a WAG is around 106dB with a 2.83V input and a single box -3dB is around 40ish Hz. Multiple boxes will get to 35Hz or lower response (real -3dB as taken from rated sensitivity) and the response will smooth out quite a bit-not so many peaks and valleys). I have never seen any labs measured correctly-outdoors, so those numbers are kinda interpolated for various indoor responses in less than idea conditions. I would be interested to see how a properly built lab sub would really measure-in both singles-duo and quads. Say outdoors-away from reflections-10M away, 28.3V input. Ivan, I'm expecting to do measurements like this for Art, so at some point in the next 10 years ( ) I'll have the results.

+1 Silas, I would love to see measurements of 1,2, and 4 labs outside.

[Berti Jacobs]

Hello all

Ivan thanks for the WAG

That is a bigger difference than I expected compared
to a TH412!! while dimensions are pretty close.

I wish I could A, B!!

And for the fun A, B, C with a th221 !!!!!
(any saucy story's / news / tests regarding the 221???)

berti

[Art Welter]

Berti,

The TH412 is two ohms nominal, the LAB sub, 3 ohm nominal, but closer to 4 ohms due to the loading. Reduce  3dB from the TH412’s 110 db, due to that difference, and you have 107 dB if compared at the same power level.

If the Lab sub is 106 dB with 2.83 V, the TH412 is only 1 dB hotter, but goes lower.
Considering double the cones, more weight, a bit more size,  one dB efficiency is not a lot.

But the upper end output of the TH412 would kill the Lab sub.
And since it can take almost 6dB (2800  compared to 800 Watts RMS) more power, the TH412 with that additional power may deliver more than 6 dB more output than the LAB12 design would per truck space.

Art Welter

[Silas Pradetto]

I'm already considering selling my 8 LABs for 4-6 TH412s.