1100-Watt, 12" Single-Voice-Coil Subwoofer

$99.9599.95 each
Product Actions
Add to cart options

This item is currently not available.

Are you behind the wheel? Or in the front row at a live concert? The GT5-12 will actually make you think about this question. It combines classic elements with modern JBL engineering breakthroughs. Check out competitors at a similar price point – you won’t find a more solid motor structure, or one that can handle more of whatever intense bass assault you can dish out.

Item# GT5-12

General Specifications

Size 12"
Series GT5

Audio Specifications

Peak Power 1100W
Nominal Impedance 4 ohms
Power Handling (RMS) 275W
Frequency Response 27Hz–450Hz
Power Handling (Peak) 1100W
Sensitivity (2.83V/1m) 90dB


External Diameter (in) 12-5/16
External Diameter (mm) 313
Mounting Depth (in) 6-7/16
Mounting Depth (mm) 164
Mounting Cutout Diameter (mm) 286
Mounting Cutout Diameter (in) 11-1/4

Woofer Specifications

Mechanical Q (Qms) 6.39
Magnetic Gap Height (Hag – in/mm) 0.315/8
Motor Force Factor (Bl – Tm) 15.2
Voice Coil Height (Hvc – in/mm) 1.43/36.4
Maximum Excursion (Xmax –in/mm) 0.56/14.2
Suspension Compliance (Cms – ?m/N) 135
Free-Air Resonance (Fs – Hz) 29
Driver Radiating Area (Sd – in2/cm2) 82.15/530
Voice Inductance @ 1kHz (Levc – mH) 1.26
Diecast Aluminum Frame No
Voice Coil DC Resistance (Revc – ohms) 4
Vented Polepiece Yes
Surround Hi-roll rubber
Electrical Q (Qes) 0.64
Low-Frequency Transducer 12" (305mm) Polypropylene cone
Compliance Volume (Vas – ft3 / l) 1.9/54.2
Voice Coil 2" (51mm) diameter
Progressive Spider Yes
Total Q (Qts) 0.58
Click here for a complete list of all specs for this product

Spec Sheet

English 242 KB
  • (1) GT5-12 12” Single 4-Ohm Subwoofer
  • (1) Owner's Manual

Search Result For ""

1 Year Warranty

Products purchased online or from an authorized local retailer and under warranty may qualify for an exchange with a valid receipt.

Purchases made from an unauthorized dealer will not be eligible for exchange.

Call us: 1.800.336.4525

  • Sales and pre-sale assistance
  • Technical help
  • Parts and accessories
GT5-12 is rated 3.0 out of 5 by 2.
Rated 4 out of 5 by from A good value. I have one under the seat of my extended silverado, I have it hooked up with a 1200 watt kicker amp. 686rms rated. The sub sounds pretty good. I modified my truck box to make it downfire. it really cleaned up the bass and gave it a little more thump. Overall happy with it but I can never have enough bass. i wish i got the next step up which i think is a touring series. for what I spent it was not a bad deal.
Date published: 2014-04-09
Rated 2 out of 5 by from This sub sounds real good no distortion I have two of these subs in the back of my car they sound real good I have a alpine amp pushing them they haven't gave up yet they bounce my rear view mirior around very very satisfied with them
Date published: 2012-07-06
  • y_2017, m_2, d_19, h_20
  • bvseo_bulk, prod_bvrr, vn_bulk_0.0
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_2
  • loc_en_US, sid_gt5-12_, prod, sort_[SortEntry(order=RATING, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_jbl

Does anyone have a recommendation for a grill cover for this speaker?

Asked by: Bert0751
Unfortunately, this product does not come with a grille. You would might want to check with third party retail stores that specialize in making grilles. All standard universal 12” grills will work with this speaker.
Answered by: Ren at Customer Service
Date published: 2017-02-06

Will this sub work OK in a 1.25 cubic ft sealed box?

Asked by: Oswald
If you are looking for tight accurate bass, your best bet is a 1 cubic foot sealed enclosure. If you are running 2 speakers in the same box, all you have to do is double the space, making it 2 cubic feet.
Answered by: Joe G at Customer Service
Date published: 2016-08-27

I have two of these and need to build a box. I wanted to know the exact dimensions of the box that would make it sound even better. I been dealing with systems for about 12 years and know that the box can make a big difference. Should it b ported or close

Asked by: jhall
If you are looking for tight accurate bass, your best bet is a 1 cubic foot sealed enclosure. If you are looking for deeper, more extended bass, a 1.75 cubic foot ported enclosure would be the way to go. For this enclosure you would tune the box to 34Hz by putting in a 4" diameter port that is 10" long. As for the shape of the box, it is impossible to give these dimensions as we don't know where you will be putting it. So the shape must be decided by you. Here's a way to calculate the sides of an enclosure. One cubic foot is 1728 cubic inches. Let's say you want to build a 6.5 cubic foot box. Convert 6.5 cubic feet to cubic inches by multiplying 6.5 times 1728, which equals 11232 cubic inches. The area of a rectangle can be calculated by the formula Length x Width x Height = Area. So, pick two sides that you would like to come close to. Lets say a height of 22 inches and a depth of 20 inches. I'll pick 24 inches as the width to start. 20 x 22 x 24 = 10560 - too small 20 x 22 x 26 = 11440 - too large 20 x 22 x 25.5 = 11220 - CLOSE ENOUGH So, your internal dimensions would be 22" High, 20" Deep and 25.5" long. You can double the cubic inches and also double the vent area if you wish to use both drivers in one chamber.
Answered by: Joe G at Customer Service
Date published: 2016-08-16

Will this JBL Subwoofer fit/replace the factory one in a 2001 GMC Yukon?

Asked by: Crazy Eyes
I can't say definitively, but I believe the stock sub in the 2001 GMC Yukon is an 8" sub. If this is the case, the GT5-12 will be too big for this stock location in your vehicle.
Answered by: Joe At Customer Service
Date published: 2016-04-26

how wide is the magent

Asked by: Roger
Thank you for your question the magnet size is around 4 inches
Answered by: Randy at JBL
Date published: 2016-03-25
  • y_2017, m_2, d_20, h_6CST
  • bvseo_bulk, prod_bvqa, vn_bulk_0.0
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_5
  • loc_en_US, sid_gt5-12_, prod, sort_[SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_jbl

No Online Dealer's available for this product

Find a Store Near You

The Store Locator is designed to help you find the closest store near you.

Click a store in the list or on the map to view details.