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Old 15th December 2009, 10:13 PM   #1
form109 is offline form109  United States
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Default 4" Woofer from Colby Speaker System

i went to the Flea Market today and Got a Colby Speaker system...well the woofer to it anyway...to my Dismay the Sub Didnt even power on when it was plugged in...i returned the sub..and traded it in for another one Which ill post later...anyway i got to keep the Driver in the sub.

http://www.flickr.com/photos/general...47732/sizes/o/

i guess you couldnt really call this a Subwoofer...its awfully tiny...but it does have a good amount of Excursion..and doesnt make alot of noise when its moving,the Unit has a 20 Watt 4 Ohm Rating...the Main Thing i noticed though is the Rubber Surround.

http://www.flickr.com/photos/general...n/photostream/

anybody have any suggestions what to do with this thing?
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Old 16th December 2009, 03:52 PM   #2
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These images don't work for me. If you had a woofer tester, we could suggest some interesting applications for it.

Alternatively, small woofers like those, in my experience, do better when the port is blocked (I use socks), or sealed completely.
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Old 16th December 2009, 03:53 PM   #3
MaVo is offline MaVo  Germany
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I cant see the pictures, but since 4 inch is probably even to small for a midrange, i doubt you can get usefull amounts of bass out of that. maybe you could build a small computer fullrange speaker out of it.
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Old 16th December 2009, 06:00 PM   #4
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MaVo,

You are right but what's the point? He asking for assistance with what he has.

I can't open the attachments either.

Go down to Manage Attachments, then Browse, attach your file then hit Upload. When they show up, close the window and hit Submit Reply
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File Type: png Screen shot 2009-12-16 at 10.57.10 AM.png (111.1 KB, 181 views)
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Old 16th December 2009, 06:44 PM   #5
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Small bandpass box, I have a similar driver here that is doing nothing.

Surprising amount of bass for the woofer size, from memory 4liter back section 2 liter front section and a port about 50 * 70mm.

My nephew blew his amp and the woofer has been sitting here waiting for a project
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Old 16th December 2009, 06:50 PM   #6
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The URLs linked are not images, they are FLikr web pages (and they each had an error in them). I've fixed them so you can see.

Just a wild guess, but if these have been optimized for woofer duty, you can likely get into the 50s with them, maybe a bit lower, but with efficiency in the low 80s or high 70s.

dave
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Old 18th December 2009, 07:57 AM   #7
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It looks pretty typical of small sub drivers. Here's an idea - make it into a small ipod dock, ie, put the woofer on the back/bottom, and add a couple of small full-rangers.
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Old 18th December 2009, 11:15 AM   #8
MaVo is offline MaVo  Germany
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Quote:
Originally Posted by Cal Weldon View Post
MaVo,

You are right but what's the point? He asking for assistance with what he has.
My intend was to give a little perspective.

If one really wanted to get the most out of it, i can only think of two options. Either you maximise its output by minimizing the losses it has on the way to the listener - which means you put the sub next to your head (i have done so too in the past, it can work, for example behind the head if you sit on a couch) or you maximise its output by using a horn which amplifies the output the speaker has. You could make a cute tapped horn from it and if your room is small and your listening habits are more on the moderate side, it could be a fun project. If you dont expect too much low bass, it could make a interesting midbass horn

Last edited by MaVo; 18th December 2009 at 11:17 AM.
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Old 24th December 2009, 05:21 PM   #9
form109 is offline form109  United States
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Quote:
Originally Posted by chris661 View Post
It looks pretty typical of small sub drivers. Here's an idea - make it into a small ipod dock, ie, put the woofer on the back/bottom, and add a couple of small full-rangers.


i mistaked the size...its actually 3"...it has a Pretty Wide Range...i think it would be most Useful as a Fullrange than a woofer...though a Few of them with a nice Tweeter would make nice Surrounds or a Center channel.
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Old 24th December 2009, 06:31 PM   #10
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A lot of 2.0 PC speakers use such a thing, with a tweeter, crossed at 8kHz ish. The extra tweeter, in my opinion isn't always necessary.

Good luck in whatever you decide to do with it.
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