3” mid modified into a subwoofer

Hayden · 15th May 2006, 12:27 PM

This driver is about 3” and it’s seriously modified, recoiled at .5ohms in a sealed 12mm MDF box surprisingly it produces very low frequencies. If positioned correctly it can be used as a computer sub with good output level the sound quality is not to good but reasonable conceding the filing cabinet is vibrating also, but man it pounds for a 3”

http://img208.imageshack.us/my.php?i...img33415jf.jpg

Crazy-Stereo · 15th May 2006, 12:42 PM

I interested in mini sub too. Can you post more pictures of the modification process?

Hayden · 15th May 2006, 01:59 PM

I have 1 photo of the coil that I have to find. also I have a video clip about 7mb if you want of it in action.

Crazy-Stereo · 16th May 2006, 01:39 PM

yes.

ocool_15 · 16th May 2006, 03:03 PM

looks interesting, Have you done any measurements? The T/s parameters would be interesting to look at.

Hayden · 26th May 2006, 11:28 AM

There’s not much to show right now, I have only recoiled it at the moment, hopefully I’ll be changing the magnet structure when I gain some good knowledge about coils and magnets.

http://img205.imageshack.us/img205/2...ecoiled0so.jpg

ocool_15 · 26th May 2006, 06:41 PM

IMHO If i were to change something I would look at the spider. If you could use 2 or otherwise stiffen it should reduce vas alot, though increasing fs.
Your mechanical control would be better over the cone movement. This wouldnt help your efficiency but I think it would sound better. Adding cone mass would lower fs but giving up some mechanical control of the cone.

That is some of my understanding but its difficult to know where to go without some baseline T/s parameters.
So did changing the coil like you did increase the motor strength? You can provide alot more current but I would almost think going to less windings would reduce motor strength and efficiency.....

15th May 2006, 12:27 PM	#1
Hayden diyAudio Member Join Date: Aug 2004 Location: Mackay Australia	3” mid modified into a subwoofer This driver is about 3” and it’s seriously modified, recoiled at .5ohms in a sealed 12mm MDF box surprisingly it produces very low frequencies. If positioned correctly it can be used as a computer sub with good output level the sound quality is not to good but reasonable conceding the filing cabinet is vibrating also, but man it pounds for a 3” http://img208.imageshack.us/my.php?i...img33415jf.jpg

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
IC: Looking to get my T-Amp modified	cmirza	Swap Meet	0	29th May 2006 06:19 AM
ME2 modified	MJS	Multi-Way	7	20th October 2005 03:41 PM
modified mid-fi?	amo	Multi-Way	0	10th June 2003 01:21 AM
Can This Amp Be Modified???????	OMNIFEX	Solid State	4	11th April 2003 02:37 AM
Modified ESP 3A amp.	Freddie	Solid State	1	26th June 2002 05:04 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	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

15th May 2006, 12:42 PM	#2
Crazy-Stereo diyAudio Member Join Date: Sep 2005 Location: Sarawak (aka Borneo)	I interested in mini sub too. Can you post more pictures of the modification process?

15th May 2006, 01:59 PM	#3
Hayden diyAudio Member Join Date: Aug 2004 Location: Mackay Australia	I have 1 photo of the coil that I have to find. also I have a video clip about 7mb if you want of it in action.

16th May 2006, 01:39 PM	#4
Crazy-Stereo diyAudio Member Join Date: Sep 2005 Location: Sarawak (aka Borneo)	yes.

16th May 2006, 03:03 PM	#5
ocool_15 diyAudio Member Join Date: Nov 2004 Location: sk	looks interesting, Have you done any measurements? The T/s parameters would be interesting to look at.

26th May 2006, 11:28 AM	#6
Hayden diyAudio Member Join Date: Aug 2004 Location: Mackay Australia	There’s not much to show right now, I have only recoiled it at the moment, hopefully I’ll be changing the magnet structure when I gain some good knowledge about coils and magnets. http://img205.imageshack.us/img205/2...ecoiled0so.jpg

26th May 2006, 06:41 PM	#7
ocool_15 diyAudio Member Join Date: Nov 2004 Location: sk	IMHO If i were to change something I would look at the spider. If you could use 2 or otherwise stiffen it should reduce vas alot, though increasing fs. Your mechanical control would be better over the cone movement. This wouldnt help your efficiency but I think it would sound better. Adding cone mass would lower fs but giving up some mechanical control of the cone. That is some of my understanding but its difficult to know where to go without some baseline T/s parameters. So did changing the coil like you did increase the motor strength? You can provide alot more current but I would almost think going to less windings would reduce motor strength and efficiency.....

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)