Cabinet suggestions for two Eminence LAB12 - diyAudio
Go Back   Home > Forums > Loudspeakers > Subwoofers

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 15th March 2013, 05:33 PM   #1
diyAudio Member
 
Rullknufs's Avatar
 
Join Date: Mar 2010
Location: Sweden
Send a message via Skype™ to Rullknufs
Default Cabinet suggestions for two Eminence LAB12

I have been offered to buy a pair of Eminence LAB12 for 1500SEK ($235) + shipping.

What fun can be done with these? I have a pair of floorstanders with two Morel CAW638 per box in ported cabinet, they reach down to about 30-35Hz. I would like some more headroom and power below ~60Hz.
Room size is about 16sqm and the cabinets can't be too big (the Labhorn is too big).

I was thinking of maybe powering them with a Behringer iNuke amp and using a miniDSP for XO.

I see WinISD recommends vented 100l tuned to ~22-23Hz but 100l is a little too big I think, especially since I'd need two 100l cabinets.

What cabinet would you suggest? I have seen that it is popular with smaller sealed cabinets and using EQ but doesn't that mean limited capacity in the lower regions (sub30Hz)?
__________________
My audio and DIY blog: http://phimusic.blogspot.se/
  Reply With Quote
Old 15th March 2013, 06:07 PM   #2
diyAudio Member
 
Join Date: Jan 2011
Labhorn is "too big" and 100L is "a little too big"
Why even bring up the lab horn then it's 6x that size lol.

A horn for 20hz extension is out of the question then. Stick to sealed with EQ (smaller box option) or ported. Make sure ports are adequate
  Reply With Quote
Old 15th March 2013, 06:33 PM   #3
diyAudio Member
 
Join Date: Mar 2006
Location: Montana Missoula
Why not use the dsp version of that amp?
A 3000DSP will put out around 600 watts per sub and probably overpower your mains by quite a bit, even in a small sealed box.
  Reply With Quote
Old 15th March 2013, 06:59 PM   #4
diyAudio Member
 
Rullknufs's Avatar
 
Join Date: Mar 2010
Location: Sweden
Send a message via Skype™ to Rullknufs
Well, I didn't know the exact size of the Labhorn since I didn't really check it up. I just knew it was too big for my room since it's a horn.

I don't need to hit 20Hz, I'm fine with 25 and up.

I haven't really read much about the DSP in that amp, I have always thought the miniDSP was better and more user friendly. I will go look it up.

Btw, my mains are capable of pretty good SPL. ~91dB sensitivity and ~300-400w power handling.
__________________
My audio and DIY blog: http://phimusic.blogspot.se/
  Reply With Quote
Old 15th March 2013, 09:47 PM   #5
diyAudio Member
 
Rullknufs's Avatar
 
Join Date: Mar 2010
Location: Sweden
Send a message via Skype™ to Rullknufs
Is it possible to run them in smaller vented boxes, like 60-80l?
__________________
My audio and DIY blog: http://phimusic.blogspot.se/
  Reply With Quote
Old 15th March 2013, 10:56 PM   #6
diyAudio Member
 
chris661's Avatar
 
Join Date: Feb 2008
Location: Sheffield
Blog Entries: 8
... But will your mains still sound good at 400w input?

For your requirements, I'd say either small sealed with plenty of eq (make sure you get the cabinet size so that Xmax and power handling run out at roughly the same time), or maybe isobaric ported.

With the sealed option, you can choose the lower cutoff. You could, for example, throw a lot of power around and get down to 15Hz (for example). This would be great for movies, but there's not a lot of music with anything so low. I have noticed that electronic music benefits from the extra extension.

The ported option would probably provide more headroom to around 20Hz, but you can't go below port tuning.

I'd go sealed, but its your call: extension vs SPL**.

Chris

** that's not to say that 2x12" sealed would be short of SPL - far from it - but if you wanted that extra SPL, you know what to do.
  Reply With Quote
Old 16th March 2013, 10:23 AM   #7
diyAudio Member
 
Rullknufs's Avatar
 
Join Date: Mar 2010
Location: Sweden
Send a message via Skype™ to Rullknufs
Probably not. I haven't tried going that far.
Isobaric ported seems like a better choice. WinISD says 51l tuned to 23Hz. Problem is vent length which is really really long. Not sure how to build that box.

I don't need extension down to below 20Hz. I'd rather have good output 25-30Hz and up instead.
I don't know if WinISD is wrong or if it's me that is wrong, but it seems like sealed with EQ only gives me about 101dB at 25Hz, 104dB at 30Hz and 109dB at 40Hz. The 40Hz performance is fine but I'd like more at 30Hz and below. Is vented the only option?
__________________
My audio and DIY blog: http://phimusic.blogspot.se/
  Reply With Quote
Old 16th March 2013, 10:38 AM   #8
diyAudio Member
 
Join Date: Mar 2006
Location: Montana Missoula
I think with room gain (and pushing the drivers a bit) you would get over 110db at 20hz in a pair of 50L sealed boxes.Click the image to open in full size.
  Reply With Quote
Old 16th March 2013, 10:41 AM   #9
diyAudio Member
 
chris661's Avatar
 
Join Date: Feb 2008
Location: Sheffield
Blog Entries: 8
I'm reading off 107dB@25Hz, 110dB at 30Hz, and 115dB at 40Hz.

The above are all excursion limited. I suspect you've set the cabinet size too small, and that has resulted in thermal power ratings being reached before all the excursion is used.

Chris

PS - IIRC, WinISD computes for half-space. You've got room gain and boundry re-inforcement yet.
PPS - use 60L for the two drivers (sealed), and set the power input to 800w. At that cabinet volume you *just* run out of excursion when the amplifier begins to clip.
  Reply With Quote
Old 16th March 2013, 11:06 AM   #10
diyAudio Member
 
Rullknufs's Avatar
 
Join Date: Mar 2010
Location: Sweden
Send a message via Skype™ to Rullknufs
I set the cabinet size to ~50l.

So you think sealed 50l per sub will be fine enough for me? I still see excursion being the main problem. But maybe I'm just doing it wrong.

So would this be good bang for the buck? I guess the drivers in total will be ~$300 including shipping. If so, I'll buy them.
__________________
My audio and DIY blog: http://phimusic.blogspot.se/
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Eminence Lab12, ported box sangram Subwoofers 34 13th May 2012 08:56 PM
Eminence LAB12 cheaper alternative feket663 Subwoofers 13 30th January 2012 07:34 PM
FS- eminence LAB12 and S2010 Pyroibw Swap Meet 0 12th August 2010 09:56 PM
Eminence Lab12 smallangryboy Subwoofers 17 21st March 2005 03:22 AM
Eminence LAB12/any take on this one? peterpan Multi-Way 4 18th April 2004 06:57 PM


New To Site? Need Help?

All times are GMT. The time now is 11:50 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2