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-   -   Help with 8 inch Sun fire woofer based pushpull tapped horn please? (http://www.diyaudio.com/forums/subwoofers/224351-help-8-inch-sun-fire-woofer-based-pushpull-tapped-horn-please.html)

fatbattery 26th November 2012 11:50 AM

Help with 8 inch Sun fire woofer based tapped horn please?
 
Gday I just picked these up on impulse because prolly my medication was off or hopefully I was right in thinking these where too cheap to let go. Here they are. Sunfire Junior Subwoofer -Driver Only | eBay apparrently the seller has 2 not 4 available so ideas of a push pull tapped horn are out. He does have more 10' and 12's for 150 each which is getting to expensive for me. Though a 12 inch tapped horn does sound like a nice option using these sunfire type woofers.

I guess my biggest problem is that I will not be able to get factory specs. I thought maybe I can build a tapped horn. But I would need help with the design. I am also worried that they may even be motional feedback voice coils making them useless. I thought there might be a reason why I got them so cheap.

SUNFIRE: True Sub Super Junior - TS-SJ8

Do you think you good folks help me design a tapped horn for them? Are they even suitable? I will just make a pair of small sealed subs for PC use if they are not suitable for tapped horns.

fatbattery 26th November 2012 04:26 PM

Tapped Horns These 6.5 inch tagband I think folded horns what I would like to build. Just a slightly larger pair with hopfully a smidge more hiend. The low end is fine.

This seller does does have 10 and 12 inch drivers of the same contruction for 150 each.

DrDyna 26th November 2012 05:33 PM

The motion feedback shouldn't make them useless, as far as I know, most of them just use a piezo pickup mounted to the coil, or a small secondary coil. It should be a functional driver whether it's present or not.

The problem you're going to have is not having proper specs for the driver, which is what you're going to require to model a TH for it.

They do look a bit like Hi-Vi drivers though.

fatbattery 28th November 2012 01:52 PM

Quote:

Originally Posted by DrDyna (Post 3257704)
The motion feedback shouldn't make them useless, as far as I know, most of them just use a piezo pickup mounted to the coil, or a small secondary coil. It should be a functional driver whether it's present or not.

The problem you're going to have is not having proper specs for the driver, which is what you're going to require to model a TH for it.

They do look a bit like Hi-Vi drivers though.


Yea They Do. I couldn't get the 4 but I did get 2 or it looks like I will. Its a shame 4 would make a good ppsl cab too I would think. Perhaps I can just scale up volvo's TH design to take an 8 inch driver.

DrDyna 28th November 2012 02:33 PM

Quote:

Originally Posted by fatbattery (Post 3260796)
Perhaps I can just scale up volvo's TH design to take an 8 inch driver.

You can try, but it's going to be trial and error without modelling it using proper specs.

pcb121055 2nd December 2012 02:09 AM

Just a thought, fatbattery... but I bought a WT3 from partsexpress for $99 which measures the parameters you need for a full design. No reason to guess. Weren't Sunfire (Carver) enclosure designs ELF?

norman bates 2nd December 2012 04:32 AM

you betcha

fatbattery 2nd December 2012 09:09 AM

I am Australia the shipping is huge but yea I get where your coming from.

fatbattery 2nd December 2012 09:11 AM

I know a guy that would test them for me. Then a design would be much easyer.

fatbattery 2nd December 2012 09:13 AM

Quote:

Originally Posted by pcb121055 (Post 3266423)
Just a thought, fatbattery... but I bought a WT3 from partsexpress for $99 which measures the parameters you need for a full design. No reason to guess. Weren't Sunfire (Carver) enclosure designs ELF?

Whats elf. Is it something that going to render my new speakers worthless?


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