Need Sub Construction help

[terra 5,000+ posts]

For my honors physics class we have to build a speaker as our midterm final. i figured since i have a T4 motor laying around i might have somethin fun. everything has to be hand built except the motor obviously. im making the basket out of wood with a fiberglass cone and a ton of rubber bands connected between the basket mounts and the place where the cone meets the vc as the suspension.

question time..the voice coil.

1. i plan on getting a 3" role of thin cardboard and wrapping it tightly in thin copper wire. what connects to the vc in terms of wires? the tinsel leads? and how do i determine if its a single 4 ohm or 8 ohm or any of that...?

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[dragnix 5,000+ posts]

wow, what kind of wood? I have a feeling it's going to break

 

[terra 5,000+ posts]

does the basket have tons of stress put on it? like enough to snap mdf? may have to reinforce with glass then. i need audioholic in here..

 

[terra 5,000+ posts]

somebody with a deep knowledge of sub construction help me out

 

[audioholic 5,000+ posts]

Well to be honest, Ive never wound a voice coil by hand before. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif But I do know the final impedance of the coil is determined by the actual resistance of the wire in the coil. This means impedance will be detemrined by the material used (copper or alum), the diameter of the wire, and the number of windings.

Try emailing the guys over at Fi, tell them its for a school project, and Im sure they'd be happy to chime in with specific info for your frankenstein.

 

[terra 5,000+ posts]

thanks a lot

 

[WrenchGuy 10+ year member]

Here.



This will help you some too.

 

[MyFartsStink 10+ year member]

pics of sub when its done is needed

 

[Scoobydoo 5,000+ posts]

Also try pm'ing John from AE, if you dont know who he is try reading some of his posts, he kinda knows what he is talking about

http://www.caraudio.com/forum/member.php?u=44056

 

[terra 5,000+ posts]

great...i think the vc is gonna be the hardest part.

 

[WrenchGuy 10+ year member]

great...i think the vc is gonna be the hardest part.

Yeah it kinda is. I'm looking for a link right now its a rig you have to make or have. I'm looking though.

 

[terra 5,000+ posts]

o ok thanks..most people in the class are using a pie tin with a fridge magnet and a lil bit of wound coil...

 

[MyFartsStink 10+ year member]

o ok thanks..most people in the class are using a pie tin with a fridge magnet and a lil bit of wound coil...

You're going to make all their projects look like shit.

 

[terra 5,000+ posts]

thats my goal

 

[WrenchGuy 10+ year member]

o ok thanks..most people in the class are using a pie tin with a fridge magnet and a lil bit of wound coil...

Just make it WAY functional and get an A+ whooooo! Paper plates and weatherstripping work good too. But technically the