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Lab12 - Tapped Horn -
Lab12 - Tapped Horn -
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Old 9th March 2016, 01:12 AM   #301
nuconz is offline nuconz  United States
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Quote:
Originally Posted by sippy View Post
2 heating radiators and a doorway - corners are dead space (unless one has corner speakers already)
attic, basement, or upper wall near ceiling?
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Old 14th May 2017, 09:23 PM   #302
brookhart995 is offline brookhart995  United States
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I am going to start building one of these this week. I am going to use an Infinity 1262W sub driver. I have simmed this driver in Hornresp on this design and using a 2.0mh inductor the response is basically identical to the Lab 12. I bought 4 of those lnfinities when they were closing them out at $60 each.
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Old 25th May 2017, 03:41 PM   #303
brookhart995 is offline brookhart995  United States
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I have it mostly built and ready to go. Here are a couple photos. I'll have to post my impressions once I get to listen to it for a while. I am going to use a Behringer DSP1000 to drive it.
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Old 25th May 2017, 03:43 PM   #304
brookhart995 is offline brookhart995  United States
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Default Photos

Here they are.
Attached Images
File Type: jpg IMG_1176.jpg (994.8 KB, 404 views)
File Type: jpg IMG_1179.jpg (752.5 KB, 395 views)
File Type: jpg IMG_1180.jpg (949.9 KB, 371 views)
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Old 25th May 2017, 03:43 PM   #305
HumbleDeer is offline HumbleDeer  Belgium
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Drives me nuts. It's officially known as the 'Behringer iNuke NU1000DSP'. Sorry.

Too much OCD.
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Old 25th May 2017, 04:03 PM   #306
djtimmy77 is offline djtimmy77
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Looks awesome! Interested to see how you like it with the infinity driver. I love mine with the lab driver.
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Old 25th May 2017, 06:52 PM   #307
brookhart995 is offline brookhart995  United States
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I used Hornresp to sim several drivers (including the Infinity) and it looked almost identical in response and extension to the Lab driver. I am using a 13 gauge 2.0mh inductor that I found for a good price.
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Old 25th May 2017, 06:56 PM   #308
djtimmy77 is offline djtimmy77
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I almost went with the infinity but kind of always wanted a Lab12 driver haha!
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Old 28th May 2017, 03:34 PM   #309
BP1Fanatic is offline BP1Fanatic  United States
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Nice build!
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Old 17th April 2019, 05:52 AM   #310
Mazza is offline Mazza  Australia
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Default Lab12-Alpine R-W12D2 Tapped Horn

So I really wanted to build a TH for home theatre to understand what all the hype is about.

My first effort was a Martinsson TPAM10HTL that worked great - ie build matched simmed and benefitted from a big boost down low from room gain. I chose this as I wanted to try out some drivers I already owned.

For ULF output I was drawn to this design but landing the Eminence Lab12 in Aus is about a $400 proposition with shipping. Alpine car subwoofers are available locally however so I instead investigated the Apline SWS-12 or SWR-12 (and newer R-W series) as alternatives.

Neither look as good as the Lab12 when modelled, but my experience with room modes suggested that real world issues would likely overshadow the hornresp bumps.

R-W12D2 in black, Lab12 in grey (specs say 20mm xmax on this new R-W series)

Click the image to open in full size.

and SWS in black, Lab12 grey...

Click the image to open in full size.

So after showing this to a buddy who is a HT nut he went straight out and purchased a pair of the Alpine R-W12D2 and I already have a pair or SWS-1242 doing duty in my pool area music system.

Long story short, this system is great!

Here is a comparison of the SWS and R-W12D2 measured ground plane in my driveway with 2 volts....

Click the image to open in full size.

Here is the R-W12D2 measured in my room at the mouth and at MLP....

Click the image to open in full size.

Goes to show those resonance peaks in the Hornresp model aren't as large as predicted and that my nasty room mode between 30 and 40hz is a monster by comparison (nothing that a DCX2496 and three other subs in the room can't tame though).

And here is the effect or lowering the test receiver's low pass crossover on the peaks.....

Lab12 - Tapped Horn --lab12-w12d2-ground-plane-jpg

This image shows the measured range - the sweep starts at 10hz in each case, the upper cutoff frequency is set in the Onkyo's low pass setting for the subwoofer. So for example the gold trace is for 10hz to 40 hz.

Some pics of my measurement setup (not super highend but this is how I go about it).....

Click the image to open in full size.

I shifted the mouth to a different location to that in the original design because this will be used behind the lounge in my buddies HT room.

I measure 2 volts (these are 4 ohms drivers)

Click the image to open in full size.

Here's my test rig (MazLab )....

Click the image to open in full size.

So if Hofman's iron law holds then I've picked all three with this box = large, loud and low!

And the wife was happy when this left the house!

Click the image to open in full size.

Thats a 100L enclosure with a beer on top with an Alpine SWR-1540 for reference....

Click the image to open in full size.

So how does it sound? Its big, monumental even.

My neighbour helped me to bring this inside. He's a qualified sound engineer and in previous jobs has installed commercial cinema and worked on big budget movie sound production. His comment was "better be careful your ceilings don't come down on you"! ;-)

I normally run a pair of BR Alpine 15's and a pair of PR 10's which helps with the SPL and to smooth room modes. We ran this on its own and unequalised. It gets very loud and low. The Danley train start was epic.

I'll be installing two of these TH's in my friends HT room. Along with his pair of Alpine SWX-12's and a Dayton Classic 18 we should have some fun!
Attached Images
File Type: jpg Lab12 R-W12D2 Ground plane.jpg (130.3 KB, 443 views)
File Type: jpg Groundplanea.jpg (53.3 KB, 426 views)
File Type: jpg voltsa.jpg (48.9 KB, 424 views)
File Type: jpg Lounge 1b.jpg (31.6 KB, 425 views)
File Type: jpg riga.jpg (144.7 KB, 416 views)
File Type: jpg Lounge.jpg (290.0 KB, 395 views)

Last edited by Mazza; 17th April 2019 at 06:11 AM.
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