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

best woofer for tham12, i tried with rcf midbass..
best woofer for tham12, i tried with rcf midbass..
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 20th July 2018, 10:54 AM   #1
angelodj is offline angelodj
diyAudio Member
 
Join Date: May 2017
Default best woofer for tham12, i tried with rcf midbass..

What is the cone that spins morein tham 12?
I recommend a woofer ch pushes well, I will use it with a powersoft of 1000w.

I did some tests:
I had a 500w Chinese class d module and a rcf mb12n351 at home, but the result is really poor!
comparing with the 12ps100 of martinsson the answer seems the same ..
Click the image to open in full size.

but by simulating a 500w amplifier, things change, I think the 6mm excursion arrives
Click the image to open in full size.

moreover, often if I do not go with a hard limiter, I hear pop maybe due to over-excursion ..
however, even the original b & c in the simulation has over excursions:
Click the image to open in full size.

I simulated the 12hp1030, how do you think?

Click the image to open in full size.
Click the image to open in full size.
  Reply With Quote
Old 20th July 2018, 03:05 PM   #2
Djim is offline Djim  Netherlands
diyAudio Member
 
Join Date: Dec 2009
Location: Les Pays-Bas
It all starts with a correct model: LINK
  Reply With Quote
Old 20th July 2018, 04:22 PM   #3
Xoc1 is offline Xoc1  United Kingdom
diyAudio Member
 
Xoc1's Avatar
 
Join Date: Nov 2008
Location: Devon UK
What are your input parameters to get this sim - As Djim suggested try the input parameters in the link
The results you are showing suggest that this tiny box and driver will produce 122 - 126dB
with the limits you have set - What is it about that result that you consider poor?
  Reply With Quote
Old 20th July 2018, 05:06 PM   #4
angelodj is offline angelodj
diyAudio Member
 
Join Date: May 2017
I used the parameters taken from the blog of mr. Martinsson:
Click the image to open in full size.
I noticed that compared to the link you posted they are different!
I think the simulated db are not there at all, it will be the fault of the Chinese amplifier? or is it the inadequate cone?

I use the bass section of this amplifier:
Bordo Amplificatore Altoparlante a 2 vie gamma completa RMS 600 W Classe D Amplificatore Piastra Costruito in modulo DSP con Alluminio radiatore in Bordo Amplificatore Altoparlante a 2 vie gamma completa RMS 600 W Classe D Amplificatore Piastra Costruito in modulo DSP con Alluminio radiatoreda Amplificatore su AliExpress.com | Gruppo Alibaba
  Reply With Quote
Old 20th July 2018, 05:33 PM   #5
angelodj is offline angelodj
diyAudio Member
 
Join Date: May 2017
I simulated with the table of your post (but I put 2.83v)
Click the image to open in full size.
Click the image to open in full size.
  Reply With Quote
Old 20th July 2018, 06:47 PM   #6
Xoc1 is offline Xoc1  United Kingdom
diyAudio Member
 
Xoc1's Avatar
 
Join Date: Nov 2008
Location: Devon UK
You have not got all the settings correct It looks like you have the horn type set to ND rather than TH. You have shown the screen grab from Martinsons Blog not your actual input screen. Also note that in the blog the setting is 1Pi not 2Pi. showing a cabinet used against a back wall as well as being on the floor.
  Reply With Quote
Old 20th July 2018, 07:16 PM   #7
Xoc1 is offline Xoc1  United Kingdom
diyAudio Member
 
Xoc1's Avatar
 
Join Date: Nov 2008
Location: Devon UK
Hornresp seems to show that with the RCF MB12N351 xmax 6mm will be reached at about 44.72V - (Nominal 250 W into 8 ohms) 294W into the driver at 50hz, Using a 4th order butterworth hi pass set at 40Hz.
This does not take account of any headroom for the amplifier or thermal compression in the driver.
  Reply With Quote
Old 20th July 2018, 08:49 PM   #8
angelodj is offline angelodj
diyAudio Member
 
Join Date: May 2017
my input data:
Click the image to open in full size.

I used a 2xpi simulation because it's more realistic, should it be the standard that companies use to declare data?
  Reply With Quote
Old 20th July 2018, 09:30 PM   #9
Xoc1 is offline Xoc1  United Kingdom
diyAudio Member
 
Xoc1's Avatar
 
Join Date: Nov 2008
Location: Devon UK
As I said you are not simulating a tapped horn Where it says Nd it needs to be TH
(Click on the Nd text to change it until it reads TH) the rest of the parameters look OK to me.
  Reply With Quote
Old 20th July 2018, 09:38 PM   #10
angelodj is offline angelodj
diyAudio Member
 
Join Date: May 2017
you're right, I missed that parameter!
here is the right simulation

Click the image to open in full size.

do you think the fault in the lack of thrust resides in the amplifier?
  Reply With Quote

Reply


best woofer for tham12, i tried with rcf midbass..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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Usher S-520 woofer/midbass problems? treuben Multi-Way 0 11th February 2017 06:19 PM
compromise = small woofer - larger (horn) midbass - what woofer types blend well? freddi Multi-Way 1 31st October 2015 01:15 PM
Just looking for the perfect 5.5" midbass / woofer hukkfinn Multi-Way 24 17th July 2012 03:17 AM
Which midbass woofer for TL? CharlieM Subwoofers 7 17th November 2010 09:10 PM
Sweet little $15 Woofer/Midbass discreteouts Multi-Way 21 30th March 2008 01:24 AM


New To Site? Need Help?

All times are GMT. The time now is 09:30 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