Official Elemental Designs Subwoofer Thread - Page 525 - AVS Forum | Home Theater Discussions And Reviews
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post #15721 of 15735 Old 08-04-2016, 10:55 AM
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Originally Posted by LFTphile View Post
So this leads me to my question of wanting to use two of the highly recommended infinity 12" drivers. I've already looked online about how to wire them up properly for series and parallel but my concern is I don't know if this is a wise choice. I plan to use a box that's sealed only. The lt/1300 seems more than capable of supplying the power
you cant use two of the 1260w's as those are single 4 ohm voice coils. that would give you a wiring choice of 2 or 8 ohms total load.

you can use two of the dual voice coil 1262w's though... you would have to series the voice coils for a 8 ohm load each, and then parallel the two drivers together for a 4 ohm total load. your amp is 4 ohm minimum stable.

however, know this... you are seriously overpowering the Infinity's. they handle 300 watts RMS each ( 600 for 2 ) and that amp puts out 1000 watts RMS. you would have to use discretion with the volume knob otherwise you are going to fry the voice coils.

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P.S. Does anyone know if that second fuse in the lt/1300 is the same as the one on the outside. I don't want to go unhooking stuff and taking things apart in case I break something. Thanks
it is the same... ( 12 amp ) however, i have found 15 amp fuses in that internal fuse position. not a big deal either way, as long as that external fuse stays at 12 amps.

i would suggest testing the amp on a known good driver or speaker before going any further. a burned voice coil will take out the ICE module almost every time. luckily, it can be fixed.
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post #15722 of 15735 Old 08-04-2016, 02:46 PM
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For nezff---

Thanks for your interest. My initial plans were to just buy another 18" driver however finding one that's good quality and reasonably priced is not easy. So instead of buying a cheap knock-off and have the driver fry the amp really bad I just passed on that idea. I plan to use a sealed box that's deep instead of just cubed like the a7s-450. I think that's the way to go however I'm open to any and all advice.

For Dave---

Thanks for the heads up about the 1260 vs 1262. I was all set to get the 1260 because that's all that was recommended. Also I was aware of the power being much more than the infinitys can handle however I thought that by adding more drivers it would take some of the stress off of the drivers by spreading the watts somewhat evenly. Would maybe adding a third driver totalling 900watts be better or is the risk still present no matter what I do. I never abuse my equipment but I just want to equal as close to the original 18" as I can because it really shook the place around. Also I'll do further testing with the amp when I'm able to. I really hope the driver didn't fry the amp

So to anyone else that may have any input or recommendations please feel free to chime in. Again for everyone else I'm planning on using two or three infinity 12" drivers in a sealed deep box? As close to the original 18". I'm still learning with all this experimenting

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post #15723 of 15735 Old 08-04-2016, 06:31 PM
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Quote:
Originally Posted by LFTphile View Post
Would maybe adding a third driver totalling 900watts be better or is the risk still present no matter what I do.
the best you can do is three 1262w's wired to 2 ohms, and then series the three together for a total load of 6 ohms... at that load, the amp will be putting out less than 700 watts RMS.

you are better off with four of the 1260w single voice coils, and series/parallel them for a total load of 4 ohms.

do you understand about the impedance, and the effect of multiple voice coils wired series and parallel ? do you have a multimeter ? know that the amp cannot go below 4 ohms or it will blow up. and any higher than 4 ohms and you will be losing power.

the best idea yet, is to just get the 18 inch.

but... best to test the amp before going anywhere further. if you have to fix the amp, buy new drivers, and make speaker boxes, you will have enough money invested that you could have bought a new sub that would likely outperform what you are thinking about doing.
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post #15724 of 15735 Old 08-10-2016, 05:26 PM
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Sorry for the delayed response

What kind of output can I expect if I were to go with 4 1260 drivers. That's a pretty extreme decision if I chose that option but I am very curious and wonder if it's worthwhile.

And I am aware about the impedance not exceeding 4ohm. I educated myself years ago about what ohms are and what they do and the dangers for the anps and the fact that you can over-stress the amp or under-power your subs/drivers. Very important. But I appreciate you informing me. Where I'm confused is using multiple drivers and series/parallel configurations.

I just want to include as many options as possible then narrow down the best for me before I make a hasty decision.

Thanks for taking the time to help me and educate me
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post #15725 of 15735 Old 08-21-2016, 06:34 AM
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If you find a used A2-300 in good condition, what would be the appropriate price to pay for it (considering the sub is functional).
I was just planning to pair one with my existing A2-300.


Edit: I just noticed from last few posts that Infinity 1260W is discontinued. That is a disappointment.

Last edited by aaranddeeman; 08-21-2016 at 06:59 AM.
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post #15726 of 15735 Old 08-22-2016, 10:27 AM
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Noting that the 1260w is very difficult to find now that it is discontinued, is the Kappa 120.9 a suitable substitute? It seems like an equally nice sub, and pricing isn't too bad (don't pay MSRP).

http://www.infinityspeakers.com/subw...PA+120.9W.html
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post #15727 of 15735 Old Yesterday, 10:10 PM
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Noting that the 1260w is very difficult to find now that it is discontinued, is the Kappa 120.9 a suitable substitute? It seems like an equally nice sub, and pricing isn't too bad (don't pay MSRP).

http://www.infinityspeakers.com/subw...PA+120.9W.html
that may be a good choice. i am having trouble finding TS Parameters for it though.

another option, would be to look at the JBL subs too... since Infinity and JBL are the same company, i bet they share a lot in common.

possibly this ?: https://www.amazon.com/CS1214-1000-w...2&keywords=jbl

or this: https://www.amazon.com/JBL-GT5-12-12...5&keywords=jbl
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post #15728 of 15735 Old Today, 04:32 PM
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Strange think is the DVC 1262w are available plenty.
Was wondering if we can use that instead with some modification. Like connecting the coils serially and then connecting them to the amp.
or can I just use one of the voice coils (would that reduce efficiency)?

Last edited by aaranddeeman; Today at 04:38 PM.
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post #15729 of 15735 Old Today, 05:04 PM
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Quote:
Originally Posted by aaranddeeman View Post
Strange think is the DVC 1262w are available plenty.
Was wondering if we can use that instead with some modification. Like connecting the coils serially and then connecting them to the amp.
or can I just use one of the voice coils (would that reduce efficiency)?

sure... you can do it with the 1262w. series the two 4 ohm voice coils, and you will end up with an 8 ohm load.

unfortunately, your LT200 amp will only be able to put out 100 watts RMS at 8 ohms. wont go very loud, and the driver wont be working anywhere near it's potential.

best to get something 4 ohms. either of the JBL's i mentioned will out perform a 1262w at 8 ohms.

and no... you cannot parallel the voice coils of the 1262w. that will give a 2 ohm load, and the amp wont last 10 minutes on 2 ohms.
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post #15730 of 15735 Old Today, 05:14 PM
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oh... and no, you dont want to run only one voice coil.

the driver handles 300 watts total. it is designed with smaller gauge magnetic wire than the 1260w and each coil will only handle half the current. so if you have a 150 watt amp, then you are good.

if you put 200 into it and like it loud, do not run it for long periods of time. turn it off and let the coil cool for a while every so often, or you will melt the coil.

better idea... just get a single coil 4 ohm driver.
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post #15731 of 15735 Old Today, 05:38 PM
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oh... and no, you dont want to run only one voice coil.

the driver handles 300 watts total. it is designed with smaller gauge magnetic wire than the 1260w and each coil will only handle half the current. so if you have a 150 watt amp, then you are good.

if you put 200 into it and like it loud, do not run it for long periods of time. turn it off and let the coil cool for a while every so often, or you will melt the coil.

better idea... just get a single coil 4 ohm driver.
Yes of course. Thanks.

BTW there is 1260w available at one place, but is 50% more than what we have paid before.
And looking at the market situation they are not gonna drop that price mostly.
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post #15732 of 15735 Old Today, 05:55 PM
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Quote:
Originally Posted by daveds50 View Post
that may be a good choice. i am having trouble finding TS Parameters for it though.

another option, would be to look at the JBL subs too... since Infinity and JBL are the same company, i bet they share a lot in common.

possibly this ?: https://www.amazon.com/CS1214-1000-w...2&keywords=jbl

or this: https://www.amazon.com/JBL-GT5-12-12...5&keywords=jbl
Found t/s parameters for GT5-12. See attached.
Attached Files
File Type: pdf GT5-12.pdf (68.9 KB, 2 views)
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post #15733 of 15735 Old Today, 05:59 PM
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Quote:
Originally Posted by daveds50 View Post
that may be a good choice. i am having trouble finding TS Parameters for it though.

another option, would be to look at the JBL subs too... since Infinity and JBL are the same company, i bet they share a lot in common.

possibly this ?: https://www.amazon.com/CS1214-1000-w...2&keywords=jbl

or this: https://www.amazon.com/JBL-GT5-12-12...5&keywords=jbl
Here is for the CS1214 .
Attached Files
File Type: pdf CS1214 .pdf (103.3 KB, 4 views)
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post #15734 of 15735 Old Today, 07:07 PM
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I'm not sure what all that info means - how do those compare to the 1260w?

-Aaron
English Way Cinema and Bar - working on v2.0 in 2016, check it out.
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post #15735 of 15735 Old Today, 07:11 PM
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I'm not sure what all that info means - how do those compare to the 1260w?
I don't know either. But here is 1260W.
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File Type: pdf Infinity_1260W.pdf (130.9 KB, 6 views)
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