Official JL Audio Gotham Sub discussion thread - AVS Forum
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post #1 of 102 Old 02-16-2007, 11:07 PM - Thread Starter
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Alright, I've seen brief discussions elsewhere. Lets get one started here. Lets see everything you know about these monsters.

Keep in mind this is just a discussion thread and not necessarily an owners thread.

Can't wait till my local dealer gets one so I can go and drool in its presence and not afford to buy it.
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post #2 of 102 Old 02-17-2007, 07:22 AM
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A little later this year I think somebody should do a comparison/test of the
available dual driver subs. I would be fun and it would be LOUD
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post #3 of 102 Old 02-17-2007, 07:47 AM
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I'd like to know where the advantage is over a pair of f113's. It seems the pair of f113's would offer more flexibilty.
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post #4 of 102 Old 02-17-2007, 07:51 AM
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Quote:
Originally Posted by mojomike View Post

I'd like to know where the advantage is over a pair of f113's. It seems the pair of f113's would offer more flexibilty.


But what about a pair of Gothams!!!?
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post #5 of 102 Old 02-17-2007, 08:09 AM
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Again, four f113's.
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post #6 of 102 Old 02-17-2007, 08:29 AM
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What do I know about the Gotham.

A. I have one on order.

B. I will run to the store as soon as it arrives.

C. I will brag like a child how my sub I better than yours.Just kidding

D. Dual 13.5 drivers,3800W RMS short term amp,ARO,gorgeous looks,built like a tank,not cheap,for a select few.


Ask yourself mortal , do you have as much displacement as me ? The answer is no unless you have a Windmere fan sub.
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post #7 of 102 Old 02-17-2007, 08:41 AM
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Quote:
Originally Posted by mojomike View Post

I'd like to know where the advantage is over a pair of f113's. It seems the pair of f113's would offer more flexibilty.

You are absolutely correct... but a pair of Gothams would be pretty spectacular, too.

Looks like we will begin shipping in May of this year, but supplies will be limited while production ramps up. Quite a few are pre-sold to dealers and they will be shipped according to date of first order, so you might need to be patient.
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post #8 of 102 Old 02-17-2007, 10:15 AM
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I quess my real question is: Bottom line, which would give better performance, lower lows, higher SPL, one Gotham or two Fathoms?

Also, which is more cost effective?
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post #9 of 102 Old 02-17-2007, 10:37 AM
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post #10 of 102 Old 02-17-2007, 12:45 PM - Thread Starter
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Quote:
Originally Posted by new27 View Post

"I've seen brief discussions elsewhere"

??????


http://www.avsforum.com/avs-vb/showthread.php?t=736243
http://www.avsforum.com/avs-vb/showthread.php?t=806831


The only other thread involving the gotham i've seen is in the ultra high end forum.


When are these guys suppose to ship and how much is the price tag?
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post #11 of 102 Old 02-17-2007, 12:53 PM
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Quote:


When are these guys suppose to ship ...

Yikes... Note post No.7 of your thread.

Mr. Smith is the VP of Marketing for JL.
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post #12 of 102 Old 02-17-2007, 01:22 PM - Thread Starter
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My mistake. Skimming over too quickly.

I've watched a couple of the videos online at the JL site. Pretty impressive stuff. Wasn't sure how to place the JL home theater stuff at first. I've owned a total of 4 of their car audio subs over the years and they were always very impressive. 138 dB from 3 of their lower line 10WO series subs. And that was with material being played through a cassette deck.

Now how to come up with the money for this sub???
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post #13 of 102 Old 02-17-2007, 02:10 PM
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Quote:
Originally Posted by mojomike View Post

I quess my real question is: Bottom line, which would give better performance, lower lows, higher SPL, one Gotham or two Fathoms?

Also, which is more cost effective?

SPL: very similar (assuming the Fathoms are co-located)
Extension: very similar (minute edge to the Gotham)
Cost effective: Two Fathoms
Beauty: Gotham
Exclusivity: Gotham
Ease of moving around: Two Fathoms
Total Weight: Two Fathoms are lighter if you carry them both at the same time
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post #14 of 102 Old 02-18-2007, 02:21 PM
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Quote:
Originally Posted by msmith_JL View Post

SPL: very similar (assuming the Fathoms are co-located)
Extension: very similar (minute edge to the Gotham)
Cost effective: Two Fathoms
Beauty: Gotham
Exclusivity: Gotham
Ease of moving around: Two Fathoms
Total Weight: Two Fathoms are lighter if you carry them both at the same time

Go Gotham Go

Go 305lbs Go

Almost as heavy as a fat slob,only more productive in the bass notes! Even if the fatty eats a dozen burgers! And costing less in medical expenses!!!!!

Ask yourself mortal , do you have as much displacement as me ? The answer is no unless you have a Windmere fan sub.
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post #15 of 102 Old 02-18-2007, 03:07 PM
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Gothams are available for ordering already? I was understanding from my dealer that they wouldn't be available till late spring or early summer (as msmith has confirmed). Seems a bit early to have already placed an order.
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post #16 of 102 Old 02-18-2007, 04:18 PM
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I was referring to dealers who have already ordered them. Some have been waiting well over a year as we are *ahem* a bit behind schedule on shipping the Gotham.
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post #17 of 102 Old 02-19-2007, 02:11 PM - Thread Starter
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Just to help people speed up their search, is there a list of dealers anywhere that are getting the earliest shipment of the subs?
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post #18 of 102 Old 02-19-2007, 03:26 PM
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I don't have access to such a list... best thing to do would be to ask your dealer if they have any on order.
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post #19 of 102 Old 02-19-2007, 06:14 PM
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Quote:
Originally Posted by msmith_JL View Post

I don't have access to such a list... best thing to do would be to ask your dealer if they have any on order.

My dealer is on THE LIST! I told them no demo for the store,it is MINE. I will defend my box like a hungry beast.

Ask yourself mortal , do you have as much displacement as me ? The answer is no unless you have a Windmere fan sub.
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post #20 of 102 Old 02-19-2007, 06:17 PM
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What is the suggested retail on this sub?

See Profile
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post #21 of 102 Old 02-19-2007, 08:01 PM
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I am interested in one, if it is better than 2 Fathoms. Placement options aren't very wide, so if there is no reason to get 2 Fathoms over a Gotham besides placement abilities, I'd rather get a Gotham. How deep can they even go anyways? Pricing? Am I looking at around $7-8k?

Also.. How would Dual DD18s compare? I think it'd be a good comparison, assuming you weren't buying at retail.

"The choices we make define our lives, because choice, not chance, determines destiny"

They call me the 18 year old DJ Audiophile-upgradeitis infected-guy!
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post #22 of 102 Old 02-20-2007, 06:11 AM
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How could a gotham be better in any way compaired to 2 fathoms? With 2 fathoms you get more amp & more enclosure volume right?
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post #23 of 102 Old 02-20-2007, 06:26 AM
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Quote:
Originally Posted by meeks32 View Post

How could a gotham be better in any way compaired to 2 fathoms? With 2 fathoms you get more amp & more enclosure volume right?

With dual Fathom (5000W RMS short term) VS Gotham (3800W RMS short term) advantage two f113's.

Internal volume,here the advantage goes to the Gotham,look at the enclosure well.Unless I am mistaken the Gotham should have a bit more cu ft. of volume per driver.

Ask yourself mortal , do you have as much displacement as me ? The answer is no unless you have a Windmere fan sub.
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post #24 of 102 Old 02-20-2007, 07:22 AM
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The Gotham is larger in volume than two f113's... and it is therefore a bit more efficient than twin f113's... and it uses a specifically engineered variant of the 13.5-inch subwoofer optimized for the larger box volume... and therefore makes the same output with less total power than twin f113's.

If you were to stack twin f113's, the performance would be almost identical to the Gotham... minute advantage to the Gotham in terms of LF extension... but we're talking minute.
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post #25 of 102 Old 02-20-2007, 04:09 PM
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One would imagine that it's also easier to demand juice out of two dedicated 15A AC circuits when using dual F113s, as opposed to a single 15A circuit for the Gotham?
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post #26 of 102 Old 02-20-2007, 04:32 PM
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A single Gotham will work just fine on a 120V / 15A circuit, provided you don't play sine waves for extended periods of time. As long as the bass events are transient you shouldn't have any problems... I wouldn't run two on one 15A circuit, though.
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post #27 of 102 Old 02-21-2007, 07:24 AM
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Quote:
Originally Posted by msmith_JL View Post

The Gotham is larger in volume than two f113's... and it is therefore a bit more efficient than twin f113's... and it uses a specifically engineered variant of the 13.5-inch subwoofer optimized for the larger box volume... and therefore makes the same output with less total power than twin f113's.

If you were to stack twin f113's, the performance would be almost identical to the Gotham... minute advantage to the Gotham in terms of LF extension... but we're talking minute.

According to some measurments I saw earlier, the f113's had an impressive 109dB @20Hz/1M. With 2 f113s co-located, one can expect 115dB with ideal acoustic coupling. With the minute advantage to the Gotham in terms of LF extension, can one expect about 118dB @20Hz/1M? Does the Gotham sacrifice a bit in terms of impact and SPL at higher frequencies due to the lower extension? What kind of Max SPL can one expect at 16Hz and 12Hz at 1M distance?

I am also curious about the modifications to the driver between the Fathom and the Gotham. At 24% lower power per driver achieving almost the same performance translates to a 24% increase in driver efficiency when working in conjunction with a larger box. Indeed a very good achievement in driver technology. I understand that some of this information maybe proprietary, so if you are not at liberty to disclose I totally understand. Do tell us whatever you can though.

You folks are beginning to push the envelope and it is refreshing to see the kind of products coming out!
Thanks,
-Jai
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post #28 of 102 Old 02-21-2007, 08:05 AM - Thread Starter
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Is there a rumble (high pass) filter built in anywhere to limit the low end? Haven't seen anything about that.
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post #29 of 102 Old 02-21-2007, 08:12 AM
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I can't really give you any definitive numbers until our engineers test final production units, so the following is tentative and subject to change and you can't bust my chops if it changes... OK?

You can expect the Gotham to have marginally better extension... maybe 1 Hz lower f3 than the Fathom. Much like the difference between the f112 and f113 which is about 1 Hz as well.

You can expect the Gotham to have very similar output to twin Fathoms (within 1 dB). While the power per driver is lower (1900W vs 2500W, which corresponds to a 1.2 dB difference), the box volume and driver differences may make up for that to some extent.

The reason I am being vague is that the enclosure has undergone significant revisions in the last six months as it has been prepared for production and the amplifier has also undergone revisions to qualify it for FCC and UL/CSA. We simply haven't tested a production version yet and those are the numbers that really matter.

You know the line.... Specifications are subject to change without notice.
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post #30 of 102 Old 02-21-2007, 08:15 AM
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Quote:
Originally Posted by brandonnash View Post

Is there a rumble (high pass) filter built in anywhere to limit the low end? Haven't seen anything about that.

I was wondering about the same thing too. Sealed subs have a characteristic roll-off (much lower order curve than other designs) and this sometimes alleviates the need for a subsonic filter unlike the DTS-20 that does require one at 10Hz or even higher at 16Hz.
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