Help with 8 inch Sun fire woofer based pushpull tapped horn please? - diyAudio
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Old 26th November 2012, 11:50 AM   #1
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Default 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.

Last edited by fatbattery; 26th November 2012 at 04:22 PM. Reason: Seller has only 2 8 inch driver available
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Old 26th November 2012, 04:26 PM   #2
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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.
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Old 26th November 2012, 05:33 PM   #3
DrDyna is offline DrDyna  United States
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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.
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Old 28th November 2012, 01:52 PM   #4
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Originally Posted by DrDyna View Post
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.
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Old 28th November 2012, 02:33 PM   #5
DrDyna is offline DrDyna  United States
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Originally Posted by fatbattery View Post
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.
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Old 2nd December 2012, 02:09 AM   #6
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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?
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Old 2nd December 2012, 04:32 AM   #7
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you betcha
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Old 2nd December 2012, 09:09 AM   #8
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I am Australia the shipping is huge but yea I get where your coming from.
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Old 2nd December 2012, 09:11 AM   #9
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I know a guy that would test them for me. Then a design would be much easyer.
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Old 2nd December 2012, 09:13 AM   #10
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Originally Posted by pcb121055 View Post
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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