Has anyone heard of - or had sucess with: a dual amped, 12'' single driver ,ported subwoofer? - AVS Forum
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post #1 of 17 Old 01-04-2014, 04:49 PM - Thread Starter
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I bought it used for cheap without planning on it and didn't get an opportunity to listen to it. 

I am apprehensive about hooking it up to my receiver. What do you think?

 

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post #2 of 17 Old 01-04-2014, 04:57 PM
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Like said in the other thread, no problem, your just hooking/providing a signal to it.

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post #3 of 17 Old 01-04-2014, 07:11 PM
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Quote:
Originally Posted by staylistenin View Post

I am apprehensive about hooking it up to my receiver. What do you think?
I think that if it's what you say it is you should pull one amp and cover the hole. That would have to be a DIY done by someone with no idea what they were doing. I assume the driver is dual coil, with an amp driving each, and that's a very bad idea. rolleyes.gif
If it's two amps hooked up to a single coil woofer it's an inconceivably bad idea. eek.gif

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post #4 of 17 Old 01-04-2014, 07:23 PM
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I'm mystified that anyone would buy a crazy-looking DIY sub, un-demo'd, from someone who wasn't even positive how to hook up the back. eek.gif

Then again, if you do what Bill suggests and it works, you may get your $80 worth out of it. smile.gif


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post #5 of 17 Old 01-04-2014, 07:38 PM
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The thing is, is it doesn’t appear to be a DIY from looking at it?? I agree with the wiring as suggested in the other thread though. There are much better ways at going about things, I can’t figure for the life of me why they would choose to do so?? A signal would be the answer if he wants to find out or pull the amp and take a look at things. Still waiting on a pic regarding the front of it though. One way or another the sub is a bad idea anyway.

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post #6 of 17 Old 01-04-2014, 08:04 PM
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My guess is that it's a dual coil, and whoever built it thought that by using an amp per coil he would double the power. The heat sinks are very small, the power cords even smaller, so the amps are probably of the $50 dollar variety, maybe 75 watts, and he used two cheap amps rather than buying one good amp.

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post #7 of 17 Old 01-04-2014, 08:57 PM
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Quote:
Originally Posted by Bill Fitzmaurice View Post

I think that if it's what you say it is you should pull one amp and cover the hole. That would have to be a DIY done by someone with no idea what they were doing. I assume the driver is dual coil, with an amp driving each, and that's a very bad idea. rolleyes.gif

Hey Bill, two amps on a dual voice coil driver is such a bizarre idea that I am curious about it. Is there theoretically any possible way that could be done without a problem? Like say both amps were set to put out the exact same amount of current and be in phase? Not that I would ever think its a good idea, I am just curious about the physics of that kind of system.
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post #8 of 17 Old 01-04-2014, 09:53 PM
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Quote:
Originally Posted by Bill Fitzmaurice View Post

My guess is that it's a dual coil, and whoever built it thought that by using an amp per coil he would double the power. The heat sinks are very small, the power cords even smaller, so the amps are probably of the $50 dollar variety, maybe 75 watts, and he used two cheap amps rather than buying one good amp.

That was my thinking (if it was DIY) but we know he can’t power each side exactly unless the amp is slaved or strapped! I don’t know what lob-side on one driver would cause?

EDIT> You could always buy a single new amp and board up the rest if all this is throwing you for a loop! or just start out all over again..

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post #9 of 17 Old 01-05-2014, 07:06 AM
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Quote:
Originally Posted by shadyJ View Post

Hey Bill, two amps on a dual voice coil driver is such a bizarre idea that I am curious about it. Is there theoretically any possible way that could be done without a problem? Like say both amps were set to put out the exact same amount of current and be in phase?
The problem is just that, having them identical. If you use amps with polarity and phase adjustments that makes the job very difficult, with a blown driver the penalty for not getting it right.
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post #10 of 17 Old 01-05-2014, 07:37 AM
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Looks like an incompetently designed DIY. Still, I'd be curious to know if it could be made to work. If the OP had REW he could measure the response with one amp powered up, then the other, individually. Assuming both function, then measure with both amps engaged. I'd love to see those charts. If the thing smokes, it smokes. Lesson learned for his next sub acquisition...
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post #11 of 17 Old 01-05-2014, 08:15 AM
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It came with a 90 day warranty, right?
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post #12 of 17 Old 01-05-2014, 08:22 AM
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Originally Posted by henrich3 View Post

It came with a 90 day warranty, right?

LOL..He bought it for $80 I think? It doesn’t look like DIY, but then maybe it’s a custom DIY like mentioned in another thread with it’s maker coming from the car audio venue?? I dunno..

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post #13 of 17 Old 01-05-2014, 08:32 AM
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eljay threw out the $80 figure - not the OP. Hopefully he didn't pay that much. More info on what he's tried so far & pics of the front would be useful.

Perhaps the "port" he referred to is actually a cutout for where a second driver was supposed to go...
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post #14 of 17 Old 01-05-2014, 09:12 AM
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eljay threw out the $80 figure - not the OP.
Actually, the OP threw out the $80 figure in post #17 of his other thread, which I linked to in my earlier post.


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post #15 of 17 Old 01-05-2014, 09:31 AM
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Hadn't noticed the other thread. Curious that he started two threads on the same topic. He hasn't said in either thread whether he's tried to hook it up to see if it works.
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post #16 of 17 Old 01-05-2014, 09:19 PM - Thread Starter
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Regarding your curiosity, I started a second thread because title of the initial post no longer reflected the nature of my query. But I agree that that first thread could be deleted. Also, the amps are 300 watts each. It does work and is quite powerful, haven't given it a good run through yet.

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post #17 of 17 Old 01-05-2014, 09:51 PM
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Nice to hear that your oddball sub is functional. Please post your impressions after you've had a chance to give it a good workout.
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