Printer Friendly Forum Posts - in search of jbl 1800gti subs

Hi there everybody, im new to this site but I'm hoping I can get some help.
Well as you can see I am searching for two JBL 1800GTI subs. If anyone knows of where I can buy some, besides from the JBL website, I would greatly appreciate the info.
I have 3000 pure watts to power my system now, and I used to have two 15" JBL subs in a sealed box w/ 1500 watts and I loved them!! So I thought upping the anty and came across these 18" JBL subs.
Or if anyone here knows of some good subs, 15" or bigger that you would recommend for my 3000 watts let me know, I cant tell how one is really supposed to be so much better then another. But I like that deep bass, and you know, the better the bass when more air is moved, so thats when Im down with the larger surface area subs! Boo-yah!

How much you wanting to spend? That should narrow down the search some.

Well I would like to spend less then the $399 price from JBL website, that much is for sure. That goes for any sub, cus I wouldnt have $800 dollars for two subs at that price. I was hoping for $3-$400 total for two 15" or 18" subs. I realize thats not much money for two subs of that size and get any good quality. Thats why im so high on the JBL product. I had two JBL GTO 15" 300rms 1200peak with my Fosgate 1500.1bd amp and a 1 farad cap, and the thing sounded so damn good and clean. I dont see how you can beat at most $140 a pop for those subs. I would be open to suggestions for something more expensive though, as long as SQ is as good or better. Also, those JBL 15" subs hit as low as 20hz!Thats so damn low!!

Also, now I have two Fosgate 1500.1bd amps good for 3000 watts, so Im not sure if those subs i mentioned would be able to handle that kinda power at 2 ohms. I would have to run them at 4 ohms for 750 watts. Which would be good to not make the amp run as hard, i think thats true anyways?
So I really am not sure what to do with all that power, maybe three 15's? That'd be hard to fit in my Sonoma that it will be going into.

With that power and price range, I have no clue. Brands I was thinking of cost that much or more for just one so, guess in my mind if the JBL's have served you well before, may be best to stick with them.

Check out this one: https://www.acoustic-visions.com/~acoustic/products/subwoofer_drivers/CSS_SDX15/

It uses the XBL^2 motor so the SQ is top notch. Also note the 30mm linear excursion. I doubt you will find another sub with that kind of performance for even close to that price.

Yeah thats what I was afraid of tdsteele, but let me know what you were thinking anyways if you could.

Steven Kephart - yeah that does look like a bomb sub, high excursion, and 19.2hz! Thats deeper then human ears can hear! My old jbl subs only were capable of reaching 20hz. So yeah, i bet I would like those subs. Doesnt say how much power it can handle though...

I was thinking of some of the higher end TC Sounds subs, but when I got to checking the wiring diagrams for different ways to go with those amps, wasn't too sure any more, plus the higher end ones aren't too cheap.

Checked out what Steven had put on there and those do look sweet, and I noticed just what you did, whats the ratings for them babies. If those will handle the power you have, price wise I would definately look more into them.

Now going back to the TC's, if you did choose to run the amp at 750 rms, you should definately look at the lower line TC's, have never heard anything bad about them.

https://www.tcsounds.com/tcproducts.htm

Power handling was the only issue I was concerned with on those CSS subs. I don't know if they would handle the 3 kilowatts of power you have. The solution of course is to turn down the gains. posted_image

Thanks guys, I love some of the suggestions. Sorry I havent gotton on here for a couple of days, dunno if anyone will read this thread still, so I'm gonna make another one.
But I like tdsteele's suggestion, those TC Sounds look like a fantastic company! Ive never even heard of those guys, upon further research of them it looks like they are contracted by lots of well known brands to build their stuff. Anyways, check out this sub from them, https://www.tcsounds.com/tc2000.htm
I'm interested in the 15" TC-2000, I'm thinking about getting two of them and throwing in the x-cab of my sonoma. I want them for the 18hz capabibility! If you know where I might be able to buy those bad guys for less then there listed price on that website, id appreciate that a lot!

I think you are misunderstanding what the Fs is. It doesn't necessarily constitute the low frequency extention of the sub as there are other factors that will effect this as well. Also note that there were compromises elsewhere in the design to allow a lower Fs.

That sub does look nice, espeically for the price. I personally would rather have the CSS sub as it will have lower distortion due to the XBL^2 motor, the use of a single spider, and the lower inductance. But then I may be biased. Plus although the aluminum cone TC uses looks nice, it is very easy to dent it. They should have a higher power handling though.

As far as new pricing goes, you won't find them anywhere else. Only other way is to find someone trying to sell some used ones.

Thank you steven, I probably am mistaking the Fs, i do understand having the correct enclosure will be the major factor in the Fs, I think anyways...haha. Im very new to all this as you can probably tell.
But for those CSS subs you put a link onto earlier in the thread , it says home theater. Would they also perform good in a vehicle? The css do seem to edge out the tc sounds sub i guess from reading more about the css sub. And that is a concern for me, that is the denting of the cone on the tc sub. I have read that same problem about the Rockford Fosgate subs, thats a major reason I dont want to buy Fosgate(and they are over priced if you ask me)

And what is all the hype about the XBL^2 motor?

They list it as a car audio sub as well.

The XBL^2 motor is a patented motor topology by Adire Audio. It allows long excursion capabilities with shorter coils. And by doing this it keeps the BL much more consistant over that excursion which reduces distortion. Here's a link to some papers about it:

https://www.adireaudio.com/Files/XBL2TechPaper.pdf

https://www.adireaudio.com/Files/XBL2DetailsPaper.pdf

If you are installing these in a Sonoma extended cab, better check the depth of the speaker and the volume requirement for 2 of the subs you choose. Add in the space required to mount the amps, too. You may find your idea is a little bigger than what can actually be accomplished in the extended cab area. Unless you plan on filling up the space up to the bottom of the rear window, then you might be okay...

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VEHICLE: 2002 GMC Sonoma ZR2
Alpine CDA-7940
AudioControl EQT x2
JL Audio 1000/1
JL Audio 10W6 (originals) x3
Kicker ZR120
Kicker ZR460
Polk GXR-6 x4
Polk GXR-4 x2

Exactly right Paradigm about the box, I figure I'll need 11-12 cubic feet of box space at most, which I think might just fit in the x-cab, and leave almost all, if not all of my rear window to see out of. If it covers it up, i would plan on putting a camera facing backwards, and put my 7" screen in place of my rear view mirror.
On a side note, I want to do that any ways, put several security cameras on my truck and be able to record, you can never trust those crooked cops!
And to steven, longer excursion, shorter coils you say? Sounds like something that would fit better for my particular application anyways, plus the added bonus of reduced distortion, which Im ALL about, id rather have clean bass any day!