DIY TC Sounds LMS-5400 18" sealed 100L - Home Theater Forum and Systems - HomeTheaterShack.com

 
Thread Tools
post #1 of 7 Old 12-22-07, 02:41 PM Thread Starter
Elite Shackster
 
Ilkka's Avatar
Ilkka
 
Join Date: Jun 2006
Location: Finland
Posts: 1,468
DIY TC Sounds LMS-5400 18" sealed 100L

Manufacturer: DIY
Provided by: Ilkka
Manufacturer link: -
Price: -

Please contact if you would like to have the same kind of subwoofer (with better cabinet and numerous finish options) being built for you.

Manufacturer specs:
• Woofer: TC Sounds LMS-5400 18” (DVC 2x2 ohm)
• Amplifier: Crown CE4000 (~3600 W @ 4 ohm bridged per amp)
• Enclosure: 100 liters, 21mm (15-ply) baltic birch all around, 42mm front baffle, well braced, total weight with woofer around 60 kg / 132 lbs
• Signal processing: Behringer DCX2496

Configuration as tested:
Phase: 0 degrees
Crossover: 30 Hz / 120 Hz / Bypassed
EQ: No
Subsonic filter: No
Orientation: Woofer facing the mic



Ilkka is offline  
Sponsored Links
Advertisement
 
post #2 of 7 Old 12-22-07, 02:41 PM Thread Starter
Elite Shackster
 
Ilkka's Avatar
Ilkka
 
Join Date: Jun 2006
Location: Finland
Posts: 1,468
Re: DIY TC Sounds LMS-5400 18" sealed 100L



+/- 3 dB points: 14 Hz - 44 Hz (crossover min)

+/- 3 dB points: 25.8 Hz - 130 Hz (crossover max)
Ilkka is offline  
post #3 of 7 Old 12-22-07, 02:41 PM Thread Starter
Elite Shackster
 
Ilkka's Avatar
Ilkka
 
Join Date: Jun 2006
Location: Finland
Posts: 1,468
Re: DIY TC Sounds LMS-5400 18" sealed 100L









Ilkka is offline  
 
post #4 of 7 Old 12-22-07, 02:41 PM Thread Starter
Elite Shackster
 
Ilkka's Avatar
Ilkka
 
Join Date: Jun 2006
Location: Finland
Posts: 1,468
Re: DIY TC Sounds LMS-5400 18" sealed 100L



Ilkka is offline  
post #5 of 7 Old 01-22-08, 12:45 PM
Shackster
 
ec114's Avatar
ec
 
Join Date: Jan 2008
Posts: 63
Re: DIY TC Sounds LMS-5400 18" sealed 100L



Thanks, as usual, for all the great info, Ilkka. Would just like to point out that, according to Linkwitz's closed-box spreadsheet, 100l is good for something like 6% air-spring distortion at the LMS-5400's maximum displacement, which, if true, makes this result even more spectacular. Not sure if this chart is really for constant 110dB SPL at each frequency, or if it's a plot of the distortion along the "110dB SPL" curve from the Maximum Output Level chart, but either way, the box should be doing some damage...

Last edited by ec114; 01-24-08 at 01:31 PM. Reason: misremembered the distortion figure
ec114 is offline  
post #6 of 7 Old 01-22-08, 01:07 PM Thread Starter
Elite Shackster
 
Ilkka's Avatar
Ilkka
 
Join Date: Jun 2006
Location: Finland
Posts: 1,468
Re: DIY TC Sounds LMS-5400 18" sealed 100L

Quote:
ec114 wrote: View Post


Thanks, as usual, for all the great info, Ilkka. Would just like to point out that, according to Linkwitz's closed-box spreadsheet, 100l is good for something like 7% air-spring distortion at the LMS-5400's maximum displacement, which, if true, makes this result even more spectacular. Not sure if this chart is really for constant 110dB SPL at each frequency, or if it's a plot of the distortion along the "110dB SPL" curve from the Maximum Output Level chart, but either way, the box should be doing some damage...
It's a plot of the harmonic distortion by component along the "110 dB SPL" curve so for example at 20 Hz the SPL is ~100 dB. That means around 19 mm of excursion which translates to ~2.9% of air spring distortion (mostly 2nd harmonic) per Linkwitz. Of course that's just the theory, at least I haven't seen any real measurements on this subject.
Ilkka is offline  
post #7 of 7 Old 01-22-08, 03:52 PM
Shackster
 
ec114's Avatar
ec
 
Join Date: Jan 2008
Posts: 63
Re: DIY TC Sounds LMS-5400 18" sealed 100L

Quote:
Ilkka wrote: View Post
It's a plot of the harmonic distortion by component along the "110 dB SPL" curve so for example at 20 Hz the SPL is ~100 dB. That means around 19 mm of excursion which translates to ~2.9% of air spring distortion (mostly 2nd harmonic) per Linkwitz. Of course that's just the theory, at least I haven't seen any real measurements on this subject.
Doh! I guess the as-tested maximum output of [email protected] would rule out 110dB there. Not thinking so well; anyway, 2.9% due to box makes the driver look even better, and a larger box more attractive technically, if not aesthetically...
ec114 is offline  
 

Bookmarks

Tags
100l , diy tc sounds lms , sealed

Quick Reply
Message:
Options

Register Now




PLEASE COMPLETE ALL REQUIRED FIELDS BELOW... THANKS!

REQUIRED FIELDS ON THIS PAGE
YOU MUST COMPLETE ALL OF THESE

Username
Password
Confirm Password
Email Address
Confirm Email Address
Random Question
Random Question #2




User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
PLEASE READ BELOW PRIOR TO ENTERING AN EMAIL ADDRESS!

ATTENTION!

YOU MUST ACTIVATE YOUR ACCOUNT!

Activation requires you reply to an email we will send you after you register... if you do not reply to this email, you will not be able to view certain areas of the forum or certain images... nor will you be able download software.

AN INVALID EMAIL ADDRESS WILL CAUSE YOUR ACCOUNT TO BE DELETED!

See our banned email list here: Banned Email List

We DO NOT respond to spamcop, boxtrapper and spamblocker emails... please add @hometheatershack DOT com to your whitelist prior to registering or you will get nowhere on your registration.


Email Address:
OR

Log-in









Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML is not allowed!
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 


For the best viewing experience please update your browser to Google Chrome