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JBL Stadium GTO860C

Stadium Series 6"x8" component speaker system

Item # 109GTO860M

One of my favorite moments during a car audio installation is pulling out an old, ragged factory speaker from its...

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One of my favorite moments during a car audio installation is pulling out an old, ragged factory speaker from its...

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Item # 109GTO860M

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About the JBL Stadium GTO860C

Feel the difference

One of my favorite moments during a car audio installation is pulling out an old, ragged factory speaker from its location and then picking up its new, aftermarket replacement. And if you're installing JBL's Stadium GTO860C premium car speakers, the immediate difference is a dramatic jump in design and build. From the hefty magnet to the oversized voice coil with shimmering copper, you can see and feel improvement — now just imagine how much better they'll sound than the browning antiques that have been filling your ears with compromised audio for so long.

Feel the difference

One of my favorite moments during a car audio installation is pulling out an old, ragged factory speaker from its location and then picking up its new, aftermarket replacement. And if you're installing JBL's Stadium GTO860C premium car speakers, the immediate difference is a dramatic jump in design and build. From the hefty magnet to the oversized voice coil with shimmering copper, you can see and feel improvement — now just imagine how much better they'll sound than the browning antiques that have been filling your ears with compromised audio for so long.

Separate edge-driven dome tweeters

JBL created their GTO860C 6"x8" component speaker system as a hi-fi solution for those who want better sound in their vehicle. You'll find an edge-driven design in their separate PEI polymer dome tweeters for a smoother, more open response and minimal distortion at high volume levels. Each tweeter also features a level control button so you can adjust the brightness to your taste.

Versatile crossovers

JBL holds their external crossovers to the same standards as the rest of this speaker system. The crossovers help shape the Stadium sound and bring out all the details that make your music sound real. Each crossover also features a tweeter level control button so you can adjust the brightness to your taste.

These crossovers will easily accommodate an upgrade to a 3-way system if you'd like to add JBL's optional Stadium GTO20M 2" midrange speaker.

Woofers enhanced with Plus One+ technology

JBL's glass fiber woofer will hold its shape when the power's cranked up, so you still get punchy and defined bass. Glass fiber weighs less than traditional materials, so you don't need a ton of power to drive this woofer either. JBL's Plus One+ woofer technology extends the cone right up to the edge of the basket, giving you lots of surface area — and a bigger cone means more bass to complement the superior high-frequency response.

Power handling perfect for any system

These 2.5-ohm speakers boast ultra-high sensitivity so that you can power them with a factory radio or aftermarket stereo, but you'll get your best results feeding them plenty of power from an outboard amp. Either way, these speakers' low impedance safely takes advantage of every watt of power available for exceptional performance.

Grilles are not included; the factory grilles should be suitable for most applications.

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Product highlights:

  • component speaker system includes 2 woofers, 2 tweeters, and 2 external crossovers
  • 6"x8" Plus One+ glass-fiber woofer cone with hi-roll rubber surround
  • 3/4" edge-driven PEI polymer dome tweeter
  • 2.5-ohm impedance
  • handles up to 100 watts RMS (300 watts peak power)
  • frequency response: 40-25,000 Hz
  • sensitivity: 93 dB at 2.83 volts
  • woofer top-mount depth: 2-5/16"
  • grilles not included
  • warranty: 1 year
  • Our 60-day money-back guarantee
  • MFR # STADIUMGTO860CAM

What's in the box:

  • 2 Woofers
  • 2 Tweeters (each with 6" wire attached)
  • 2 Crossovers
  • 2 Bottom mount brackets (woofer)
  • 2 Flush-mount cups
  • 2 Threaded flush-mount adapters
  • 2 Plastic locking nuts
  • 2 Surface-mount cups
  • 2 Starfish tweeter mounts
  • 2 Adhesive backed foam gaskets
  • 2 JBL logos
  • Template on box
  • Instruction manual

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JBL Stadium GTO860C reviews

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Near perfect replacements.

Crutchfield customer from Batesville, AR on 9/9/2019

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They are great so far off headunit power without the crossovers but will be even better amped with the crossovers. Managed to fit the tweeters in the A pillars stock location.

Pros: Great midrange/midbass and smooth highs

Cons: Kinda pricey

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0 of 0 found this helpful

Highly pleased with these JBL 6x8 Components, these are a good option!

Crutchfield customer from Durham, NC on 7/26/2019

2015 Ford Taurus

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My car, a 2015 Ford Taurus, can tale a 5x7 or a 6x8 in the front doors. These 6x8's fit just fine, and the tweeters do in fact fit into the factory pillar location. This made the installation just that much easier. I've not owned JBL speakers in quite some time but I was quickly reminded that I do very much like the sound of JBL's, as I had some years ago in another car. One bit that I've not fully figured out - I am running these components with the factory radio (non-Sony Sync) and no external amp. I predicted that I would not be happy; that I would have to get an amp before I was satisfied. However, either my factory radio has decent power, or else these speakers with the somewhat low impedence just really produces big sound efficiently. I am getting plenty of bass, but of course it would be far more intense if I were running 100W per channel. I cannot think of anything negative to say about these. I'm sure they would benefit with an amp but they are surprising crisp with just my Ford factory radio.

Pros:

Cons:

Crutchfield response on

1 of 1 found this helpful

Outstanding performance

Robert from Missouri City, TX on 1/5/2019

2013 Ford F-150 XLT

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I installed these speakers on a 2014 F-150 Supercrew with a factory (non-Sony) headunit. The result is amazingly good sound throughout the entire volume band. Absolutely no distortion what so ever. I knew that I wanted to keep the factory head unit so I needed a speaker that would pull the most from the power available in a stock head unit. These speakers are 2-1/2ohm and do utilize maximum potential from the stock unit. I highly recommend these JBL Stadium components. The build quality is excellent.

Pros: Pulls the most power available from head unit with great sound.

Cons: I didn't buy them earlier. Lol

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4 of 4 found this helpful

JBL Stadium GTO860C

James T from Chicago, IL on 11/19/2018

2002 Ford Econoline

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I bought and returned the Kicker KSS 5 1/4" component and the Morel 5' x 7" component sets before settling on this JBL component set. This JBL set has the best woofer, by far, with the Kicker second, in my opinion. But the Kicker and the Morel are not 6" x 8" woofers. The Kicker and the Morel had slightly more flexible tweeters and the Morel had the best tweeter mounting system. But this one on the jBL is fine. The JBL has a 2.5 ohm resistance instead of 4 ohm, so that pulls power out of the amp. THis is the highest quality set of the three. The woofer has real binding posts for the wire and a solid, sturdy basket and cone. The morel quick disconnect post was not satisfactory. It bent. Jbl best, Kicker second and Morel third. In my opinion.

Pros: Woofer is high quality.

Cons: Tweeter is a bit bright and does not have -3 db setting.

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8 of 8 found this helpful

JBL Stadium GTO860C

Crutchfield customer from Pasadena, MD on 8/26/2018

2003 Ford Excursion

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My first install with this type of speaker. Well worth the time to install. Sounds great.

Pros: Plenty of sound with new Sony hu.

Cons: None really. A little cutting to fit the box.

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2 of 4 found this helpful

JBL Stadium GTO860C

Crutchfield customer from Merrimac, MA on 4/30/2018

2002 Ford F-350

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Worth the buy good sound

Pros:

Cons:

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1 of 4 found this helpful

Great component set for F150 2014

Tyler from Phoenix, AZ on 4/24/2018

1997 Chevrolet S10

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Installed in the front of my 2014 F150... powered with a diamond audio 4 channel HEX series amp and I couldn't be happier!!! I've had focal and jl component sets in the past and I didn't want to spend that kind of money currently. This component set is an awesome middle of the road option. Paired with the coaxial JBL set in rear doors and my truck sounds amazing. Shallow JL audio TW3s subs to complete the F150. Don't mess around with signal processing or trying to use the factory Ford crap either, get a new head unit with the I data link maestro dash and you will be happy. Had to learn that the hard way

Pros: Sound Quality Loud No speaker adapters needed for 2014 F150

Cons: None as of yet

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10 of 10 found this helpful

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More details on the JBL Stadium GTO860C

Pat M.

Features & specs

General
Speaker Size 6X8
Design 2-way
Tweeter Design 3/4" Edge-Driven Dome
Impedance (Ohms) 2.5
Tweeter Composition PEI
Woofer Composition Glass Fiber
Woofer Surround Rubber
Parts Warranty 1 Year
Labor Warranty 1 Year
Specifications
Sensitivity (1W at 1 meter) N/A
Sensitivity at 2.83 volts 93
Frequency Response 40 - 25k Hz
Minimum RMS Wattage ---
Maximum RMS Wattage 100
Peak Power Handling (Watts) 300
Top-mount Depth (Inches) 2 3/8
Bottom-mount Depth (Inches) 2 15/16
Cutout Diameter or Length (inches) 0

Product Research

Features

Plus One Woofer Cones: The Plus One speaker cones offer more surface area than other speakers that fit in the same size opening. This is accomplished by using a new basket design and hi-roll surround. The result is greater bass output and an increase in efficiency.

High-Output Design: The high output 2.5Ω voice coil design compensates for the high in-line resistance of small gauge factory wiring and extracts every watt from factory receivers, increasing overall system output and efficiency (relative to 4Ω speakers). The speakers also benefit from increased power when you upgrade the wire and add aftermarket amplifiers, designed to power a 2.5Ω load.

Woofer Terminals: The woofers' input terminals are set screws that will accept up to 12 gauge bare wire.

Mounting Applications: JBL describes this woofer as a 6x8, but it also fits many 5x7 applications. Please enter your vehicle information to confirm fit.

Tweeters: The edge-driven soft dome tweeters can be mounted several different ways using the included hardware:

  • I-Mount System: The tweeters can be surface- or flush-mounted with JBL's I-Mount system:
    • Surface Mount: Surface mounting the tweeters involves screwing the surface-mount cup to the mounting location, then inserting and locking the tweeter into the cup.
    • Flush Mount: Once a cutout is made, the tweeter is installed in the flush-mount adapter, then into the flush mount housing and inserted into the hole. The large plastic locking nut is threaded onto the housing (from behind the mounting surface) to hold the assembly securely in place. When flush mounted, the tweeters may be angled for optimum imaging.
  • Starfish Mounting Brackets: The Starfish mounting brackets allow the tweeters to be installed in factory locations behind the grilles:
    • Bottom Mount: Once the Starfish bracket is trimmed, it is secured to the underside of the grille panel. The tweeter must be inserted into the bracket and locked into place before the bracket is mounted.
    • Surface Mount: Once the Starfish bracket is trimmed, it is screwed to the top of the mounting surface behind the grille panel. Then, the tweeter is inserted into the bracket and locked into place.
    • Flush Mount: There are two sets of tabs to flush mount the tweeter in the Starfish bracket, yielding different mounting dimensions. The upper tabs mount the tweeter completely below the opening and are glued in place. The lower mounting tabs are screwed in place and result in a mounting height just under 3/8 inch. Once the bracket is mounted, the tweeter is inserted into the bracket and locked into place.

Tweeter Mounting Dimensions:

  I-Mount Surface Mount I-Mount Flush Mount Starfish Bottom Mount Starfish Surface Mount Starfish Flush Mount Starfish Flush Mount (below mounting surface)
Mounting Height 0.844" 0.592" 0.0" 0.858" 0.346" 0.060"
Depth screw depth 0.750" 1.036" screw depth 0.512" 1.0"
Frame Diameter 1.615" 2.213" 2.815" 2.620" 2.435" 2.465"
Cutout Diameter N/A 1.892" N/A N/A 1.657" 2.837"

Crossover Connections: The passive crossovers feature screw terminal inputs and outputs; they will accommodate bare wire or spade connectors up to 0.315" wide.

Tweeter Level: A switch on each crossover allows you to adjust the output level of the tweeter; choose 0 dB (flat) or +3 dB.

Crossover Dimensions:

  • Width: 5.11"
  • Height: 1.3"
  • Length: 3.61"

3-Way Upgrade: The system crossovers are gap-selectable, to accommodate a midrange upgrade. The optional GTO20M midrange (item number 109GTO20M, sold separately) includes band pass crossover to upgrade this two-way system to a three-way system with perfect tonal balance.

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Customer Q&A

1 question already asked

Q
Do the crossovers that come with this package support bi-amping?
[ Joby  May 30, 2019 ]
1 answer
A
The crossovers in this package only have one amp input and do not support bi-amping but there are ways to still use these drivers in a bi-amp setup. I recommend contacting an advisor on 1-800-324-9695 to get help with this setup. My Bio: https://www.crutchfield.com/bio/Paul
[ Paul  Jun 05, 2019 ]  Staff

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