Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Multi-Way Conventional loudspeakers with crossovers

Designing a closed cabinet for the Eminence Beta 12CX
Designing a closed cabinet for the Eminence Beta 12CX
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 13th September 2018, 09:28 PM   #11
freddi is offline freddi  United States
diyAudio Member
 
freddi's Avatar
 
Join Date: Aug 2005
Designing a closed cabinet for the Eminence Beta 12CX
I know you want to save bulk and weight but not much would really be saved. 20 seems pretty tight and would reduce cone excursion. THAN12 should be great.
  Reply With Quote
Old 13th September 2018, 09:44 PM   #12
Grymer is offline Grymer
diyAudio Member
 
Join Date: Jun 2017
Quote:
Originally Posted by Galu View Post
No need to duplicate the graphs Grymer! Makes thread difficult to navigate.
Sorry about that
__________________
Mixing on the wrong channel. Still hear the difference. Good I have placebo.
  Reply With Quote
Old 13th September 2018, 10:02 PM   #13
Galu is offline Galu  Scotland
diyAudio Member
 
Join Date: Apr 2018
No - I'm sorry I had to mention the graphs - but I get dizzy very easily at my advanced age - and I do want to follow your thread!
  Reply With Quote
Old 13th September 2018, 10:12 PM   #14
freddi is offline freddi  United States
diyAudio Member
 
freddi's Avatar
 
Join Date: Aug 2005
Designing a closed cabinet for the Eminence Beta 12CX
i know the dizzy thing as had vertigo since ~1971 and quit driving around 1994
  Reply With Quote
Old 13th September 2018, 10:30 PM   #15
Grymer is offline Grymer
diyAudio Member
 
Join Date: Jun 2017
Quote:
Originally Posted by Galu View Post
No - I'm sorry I had to mention the graphs - but I get dizzy very easily at my advanced age - and I do want to follow your thread!
If making a cab that is 22,26 liters (12" + ASD1001 is about 2,2L) gives me following numbers
  • Beta 12CX: 3,54 kg
  • ASD1001: 0,9 kg
  • Cabinet: 2.94 kg
  • Total: 7,38 kg


Cab that is 16,5L (10" + ASD1001 is about 1,4L)
  • Beta 10CX: 3,31 kg
  • ASD1001: 0,9 kg
  • Cabinet: 2,7 kg
  • Total 6,9 kg


Yeah. 2dB difference and total weight is only 0,8 kg more (for two speakers) - I'm almost entirely sure I'll go with the Beta-CX12, but I'll think about it for the next days!

Another thing:

A friend of mine from Soundboks adviced me to use Populus wood. It weights like 65% of Birch plywood. Since the Tham12 cabinet is well braced I might actually go 15mm populus instead of 12mm birch. Weight difference:
  • Faital Pro 12FH500: 3,9 kg
  • Tham12 using Populus 15mm: 11,2 kg
  • Tham12 using Birch 12mm: 13,5 kg

So total is either 15,1 kg or 17,4 kg

A lighter Tham12 would be delightful
__________________
Mixing on the wrong channel. Still hear the difference. Good I have placebo.
  Reply With Quote
Old 13th September 2018, 10:42 PM   #16
phivates is offline phivates  United States
diyAudio Member
 
Join Date: Jan 2011
Location: Willamette Valley
The 12cx is 3 db more sensitive than the 10 according to the spec sheet at usspeaker. Less xmax higher fs altogether a better fit for your application.

Last edited by phivates; 13th September 2018 at 10:47 PM.
  Reply With Quote
Old 13th September 2018, 11:01 PM   #17
Grymer is offline Grymer
diyAudio Member
 
Join Date: Jun 2017
Quote:
Originally Posted by phivates View Post
The 12cx is 3 db more sensitive than the 10 according to the spec sheet at usspeaker. Less xmax higher fs altogether a better fit for your application.
Is less xmax ever a wish? I know that 5mm is unnecessary but you make it sound like a good thing that it is less.
__________________
Mixing on the wrong channel. Still hear the difference. Good I have placebo.
  Reply With Quote
Old 13th September 2018, 11:29 PM   #18
phivates is offline phivates  United States
diyAudio Member
 
Join Date: Jan 2011
Location: Willamette Valley
You are looking for efficiency and the shorter voice coil means less mass to energize. Bass output is probably about equal because of the bigger diaphragm. I would go with the 10 for hifi applications but that's a different set of choices. Sounds like a fun project.
I see the xlim is higher on the 12 so go big!

Last edited by phivates; 13th September 2018 at 11:52 PM.
  Reply With Quote
Old 14th September 2018, 01:11 AM   #19
Grymer is offline Grymer
diyAudio Member
 
Join Date: Jun 2017
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.

Designing the speaker and placing them in a livingroom REALLY got me excited!!!

The tham12 will have feet, which help stacking during transportation. The tham12 will be used as a nightstand whilst not used since student-apartments are TINY. The coaxial cabs are about 22,4L giving the driver around 20L.

The tham12 is around 15kg. Det cabs are around 7,5kg each and my battery and amp will weight around 3-4kg. Plus cables and extras - The total weight will be 35kg. Which is quite a lot, but I only plan to carry it into the bus or over small steps. Other times it will be dragged along on its wheels.

AMP: Sure 2x300w
DSP: ADAU1701
BATTERY: Panasonic 18650 cells. I'm making a 48V battery. Maybe I'll make it 45V to ensure no damage to the Sure amp board. So perhaps 12s3p or 13s3p (Basically 12 in series and 3 parallel)
__________________
Mixing on the wrong channel. Still hear the difference. Good I have placebo.
  Reply With Quote
Old 14th September 2018, 01:15 AM   #20
Galu is offline Galu  Scotland
diyAudio Member
 
Join Date: Apr 2018
Quote:
. . . but I'll think about it for the next (few) days.
Don't take too long thinking.

Next year and your move to university are rapidly approaching!
  Reply With Quote

Reply


Designing a closed cabinet for the Eminence Beta 12CXHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
FS - Eminence Beta 12CX 12" Coaxials (4) rmeinke Swap Meet 7 20th October 2014 10:17 PM
FS: Eminence Beta 12CX sideways Swap Meet 1 6th October 2012 07:55 PM
Eminence Beta 12CX. Crossover help rvrazvan Multi-Way 19 20th February 2012 09:01 PM
Compression driver for Eminence Beta 12CX dabbler Multi-Way 10 16th June 2010 02:55 PM
Please suggest replacements for Eminence Beta 12CX Saurav Multi-Way 9 20th May 2004 04:27 PM


New To Site? Need Help?

All times are GMT. The time now is 09:38 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki