12" LMS-R Box Help (Email From Thilo at TC Sounds enclosed) - Car Audio Classifieds!
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  #1  
Old 06-25-2012, 06:02 PM
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Default 12" LMS-R Box Help (Email From Thilo at TC Sounds enclosed)

Hello Forum,

Want to get some input from people here. I will cut and paste a bit from an email thread I had with TC-Sounds because I could not find box specifications for the LMS-R.

My Requirements:
"Thilo,
My Box maker (Andrew) and myself have a few questions about your LMS-R driver in a car audio application.

Application: BMW 330Ci Trunk
Supporting: JL 1000/1 Sub Amp, Focal Components on a JL 300/4
Driver: 12" TC Sounds LMS-R
Needs: To sound great and actually hit 20 hz but it certainly does not need to be flat down to 20. I'd like to see an application where sound quality prevails over sheer output. This is going into my Girlfriends car so raw SPL is not a huge priority but It should absolutely pound when called upon.
84 cu Ft3 internal cabin volume with 14 ft cu trunk space. The rear seat will be used in their upright position so the LMS-R driver will most likely on 'see' about 14cu ft.
We do have a few dimensions to work around ( can only be about 15" high and 28" wide) but as long as we have a general suggestion for a relatively flat frequency response we can easily get that built within spec.
I have a profession box maker that will build the Box based on your recommendations

Box Size Suggestions: ?
Port area: ?
Tuning Frequency: ?

Other suggestions: ?"

Thilo's Response-

"Hi Chris,

My recommendation would be to go with the 28Hz tuned enclosure, as attached.
The actual enclosure volume should be 2.3 cubic feet, since the ports take up 0.5 cubic feet, for a net volume of 1.8 cubic feet.
The ports should be two 4" diameter ports, 36" long each, which means that you will need to use 90 degree elbows, available at home depot.
Alternatively, parts express has a full 4" diameter flanged port system, with 90 degree angle parts.
268-334
268-330
368-332
268-336
268-338


Hope that helps."

The attached images are what Thilo attached in his response.
Attached Images
File Type: jpg LMS_R_12_20Hz_1.jpg (112.8 KB, 25 views)
File Type: jpg LMS_R_12_20Hz_2.jpg (124.9 KB, 27 views)
File Type: jpg LMS_R_12_20Hz_3.jpg (137.7 KB, 21 views)
File Type: jpg LMSR12_Ported_30Hz_1.jpg (112.0 KB, 17 views)
File Type: jpg LMSR12_Ported_30Hz_2.jpg (121.8 KB, 18 views)
File Type: jpg LMSR12_Ported_30Hz_3.jpg (122.2 KB, 13 views)
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  #2  
Old 06-25-2012, 06:11 PM
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36" long each? hell with that
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Old 06-25-2012, 06:13 PM
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'Horn'-wall: 12.75 cubes net, ~25Hz tuning, 200 sq inches of port area (lowz..?)

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Old 06-25-2012, 06:20 PM
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I've got a custom TC3K on 1500w in 2.5net @ 28Hz. Friggin' intense...

It's a 36square inch slot port, but it's too heavy for the trunk so I'll be building another using x2 4" external aeros. They have to be 30" long LoL Eff it!
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Old 06-25-2012, 06:22 PM
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my box is tuned to 28hz and i absolutely love it.
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Old 06-25-2012, 06:30 PM
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Quote:
Originally Posted by loud-n-low View Post
36" long each? hell with that
Why?
I don't mind using aero ports its just $140 worth of tubing from parts express? Thats totally outrageous. I'm open to other more cost effective options for sure.
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Last edited by monsterman; 06-25-2012 at 06:46 PM.
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Old 06-26-2012, 06:27 AM
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my axis 12" is tuned to 28hz...love the sound...didnt use round ports though. I ran a LMS 15,but only used 1 4" port tuned to 27hz...Im sure it wasnt nearly enough port,but the port was alot shorter.

Last edited by loud-n-low; 06-26-2012 at 06:30 AM.
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Old 08-03-2012, 02:35 PM
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I have my Lms ultra 15 in 3.5 cubes @28 hz right now. (3) 3" aeroports were used and the length came out to around 18". I don't understand how he's coming up with 36" ports that's insane IMO
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Old 08-03-2012, 02:36 PM
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Since you have the room why not just use a slot port?
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Old 08-03-2012, 02:46 PM
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Quote:
Originally Posted by Bmoorman05 View Post


I have my Lms ultra 15 in 3.5 cubes @28 hz right now. (3) 3" aeroports were used and the length came out to around 18". I don't understand how he's coming up with 36" ports that's insane IMO
His box is smaller than yours and has more port area, makes sense.
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