A little ol' computer speaker project

Smokehouse Bob · 30th January 2007, 11:49 PM

I damarr'd the cone and cut up this little wooden plug. Kinda cute and fun the try out with cardboard OB's.

bobhayes · 31st January 2007, 08:36 AM

Is the plug connected to the pole piece or the cone? If it's connected to the pole piece, it looks amazingly close to the voice coil former. Can you even get a pin in the gap?
Nice looking little project.
Have you decided on what type of cabinet to pop it in yet?

Geoff H · 31st January 2007, 08:37 AM

No doubt about you Bob. They're good rainy day projects. Make nice nearfield monitors. Small T/Ls gets the best bass from the tiny little things. Easy to knock up in PVC plumbing.

Now you can experiment with nose cone shapes. Is the plug removable, or permanently bonded?

These little beauties go from about 150 to 18K. I bet you can't guess what brand they are. And no, they aren't from Anaheim or England.

Geoff H · 31st January 2007, 08:39 AM

Well what did you expect? Not real ones. Just a marketing company these days.

Smokehouse Bob · 31st January 2007, 01:37 PM

The plugs are secured ala Super Dave style via metal screws and magnetism from the rear. They allow just the smallest possible gap around the edge. Not too loose...not tight. The Dammar may have been a bit much, but it was just a little fun to see how they would run afterwards. I'm going to try and whittle the plugs down some and lose the "beer can" look. I'm still looking for some really small box designs/plans.

Geoff H · 31st January 2007, 07:16 PM

Sounds like a plan. You could mount both drivers on a small baffle, change one side, check the difference in sound, attack the other channel to go a bit further than matching. ie chase the better one.

Dave has a little AP for desktop speakers, may be just the ticket.

Geoff

Smokehouse Bob · 2nd February 2007, 12:32 AM

Quote:

Originally posted by Geoff H
Dave has a little AP for desktop speakers, may be just the ticket.

Geoff

Geoff,

What's an AP?

Thanks!

Geoff H · 2nd February 2007, 01:20 AM

AP = Aperiodic. An enclosure that relieves the back pressure in a non resonant manner. Not the most efficient design, but can give a very smooth bass response and retain transients. The Dynaudio A25 was probably the first commercial success of the design.

See:
Aperiodic enclosures

Cheers,
Geoff

Smokehouse Bob · 2nd February 2007, 01:25 AM

Well hell Geoff! I have a fine old pair of A-25's on the shelf next to my bench (a fiver for the pair and they cleaned up real well!). I never new they were aperiodic. Again, thanks!

Geoff H · 2nd February 2007, 01:49 AM

That would be the best 5 bucks you've ever spent. Have a look at the port and the damping material. Very simple, yet effective.

There was a pair on fleabay in oz a while back. Went for over 300 aust.

2x10" SEAS drivers + tweets for $5. Timber included. You do know what to take home.

Geoff

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31st January 2007, 08:36 AM	#2
bobhayes diyAudio Member Join Date: Sep 2004 Location: Bungawalbyn, NSW	Is the plug connected to the pole piece or the cone? If it's connected to the pole piece, it looks amazingly close to the voice coil former. Can you even get a pin in the gap? Nice looking little project. Have you decided on what type of cabinet to pop it in yet?

31st January 2007, 01:37 PM	#5
Smokehouse Bob diyAudio Member Join Date: Nov 2004 Location: Woodstock, GA	The plugs are secured ala Super Dave style via metal screws and magnetism from the rear. They allow just the smallest possible gap around the edge. Not too loose...not tight. The Dammar may have been a bit much, but it was just a little fun to see how they would run afterwards. I'm going to try and whittle the plugs down some and lose the "beer can" look. I'm still looking for some really small box designs/plans.

31st January 2007, 07:16 PM	#6
Geoff H diyAudio Member Join Date: Oct 2006	Sounds like a plan. You could mount both drivers on a small baffle, change one side, check the difference in sound, attack the other channel to go a bit further than matching. ie chase the better one. Dave has a little AP for desktop speakers, may be just the ticket. Geoff

2nd February 2007, 01:20 AM	#8
Geoff H diyAudio Member Join Date: Oct 2006	AP = Aperiodic. An enclosure that relieves the back pressure in a non resonant manner. Not the most efficient design, but can give a very smooth bass response and retain transients. The Dynaudio A25 was probably the first commercial success of the design. See: Aperiodic enclosures Cheers, Geoff

2nd February 2007, 01:25 AM	#9
Smokehouse Bob diyAudio Member Join Date: Nov 2004 Location: Woodstock, GA	Well hell Geoff! I have a fine old pair of A-25's on the shelf next to my bench (a fiver for the pair and they cleaned up real well!). I never new they were aperiodic. Again, thanks!

2nd February 2007, 01:49 AM	#10
Geoff H diyAudio Member Join Date: Oct 2006	That would be the best 5 bucks you've ever spent. Have a look at the port and the damping material. Very simple, yet effective. There was a pair on fleabay in oz a while back. Went for over 300 aust. 2x10" SEAS drivers + tweets for $5. Timber included. You do know what to take home. Geoff

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