JBL GTO6427 Specifications

Document

* patent no. 6,002,780

† patent no. 6,505,705 delivering products embodying the technology developed in the professional arena – equipping leading recording studios and movie theaters, as well as live-music reinforcement in venues ranging from dance clubs to Woodstock. This expertise continues to be transformed into products that provide the impact and excitement of a live performance. The JBL ® experience is for enthusiasts who won’t settle for anything less than “live” at home or on the go.

PLUS ONE ® WOOFER

CONES

Each GTO model uses a patent-pending woofer cone with more surface area than in competing models of the same size. The benefits are increased bass output and increased efficiency, both very audible and important.

REDUCED NOMINAL

IMPEDANCE

That’s right – GTO speakers have 2-ohm voice coils. This enables them to extract all the power from amplifiers and head units that are designed to increase power when driving 2-ohm loads.

LOW-Q WOOFER DESIGN

The lower Q offers higher bass output and better transient response in typical mounting locations

(doors, rear package trays).

UNIPIVOT ™* TWEETER POD

Select JBL GTO models use a unique, patented rotating-tweeter design, which allows the installer or end user to aim the tweeter toward the sweet spot for optimal imaging.

INTERMOUNT III †

MOUNTING SYSTEM

Allows for installation of all 6-1/2" models in all four 6"-hole size standards without the need for additional adapters or installation kits.

BUILT-IN CROSSOVER

NETWORKS

Most JBL GTO speaker models come with integrated high- and low-pass filters. This results in a smoother transition between the woofer and tweeter, delivering superior midrange performance.

ADVANCED ENGINEERING

The JBL GTO speaker lineup is the result of real engineering and real-world testing. This results in speakers that absolutely sound better than the competition. High output, better bass response, long life and a smooth response are what you can expect from a GTO speaker, or any other speaker that wears the JBL badge.

ERS

® SERIES

GTO938

6" x 9" 3-Way Loudspeaker

• Plus One ® (patent pending) woofer cone

• 1/2" (12mm) My-Ti ™ super tweeter

• 1" (25mm) edge-driven

My-Ti tweeter

• Frequency response:

50Hz – 21kHz

• Sensitivity: 94dB

• Impedance: 2 ohms

• Power handling, RMS:

100 watts

• Power handling, peak:

300 watts

• Mounting depth: 83mm (3-1/4")

• Cutout diameter: 6" x 8-13/16"

(153mm x 224mm)

GTO928

6" x 9" 2-Way Loudspeaker

• Plus One ® (patent pending) woofer cone

• 1" (25mm) edge-driven

My-Ti ™ tweeter

• Frequency response:

50Hz – 21kHz

• Sensitivity: 94dB

• Impedance: 2 ohms

• Power handling, RMS:

100 watts

• Power handling, peak:

300 watts

• Mounting depth: 3-1/4" (83mm)

• Cutout diameter: 6" x 8-13/16"

(153mm x 224mm)

GTO8628

6" x 8"/5" x 7" 2-Way Loudspeaker

• Plus One ® (patent pending) woofer cone

• 1" (25mm) edge-driven

My-Ti ™ tweeter

• Frequency response:

50Hz – 21kHz

• Sensitivity: 92dB

• Impedance: 2 ohms

• Power handling, RMS:

60 watts

• Power handling, peak:

180 watts

• Mounting depth: 2-7/16" (62mm)

• Cutout diameter: 5" x 7-3/16"

(126mm x 183mm)

GTO6428

4" x 6" 2-Way Loudspeaker

With DIN Adapter

• Plus One ® (patent pending) woofer cone

• 1" (25mm) edge-driven

GTO328

3-1/2" (87mm) 2-Way Loudspeaker

• Plus One ® (patent pending) woofer cone

• 3/4" (19mm) My-Ti ™ tweeter

• Frequency response:

My-Ti ™ tweeter

• Frequency response:

75Hz – 21kHz

• Sensitivity: 91dB

• Impedance: 2 ohms

• Power handling, RMS:

40 watts

• Power handling, peak:

120 watts

• Mounting depth: 1-7/8" (47mm)

• Cutout diameter: 3-3/8" x 5-3/4"

(85mm x 147mm)

90Hz – 20kHz

• Sensitivity: 89dB

• Impedance: 2 ohms

• Power handling, RMS: 25 watts

• Power handling, peak: 75 watts

• Mounting depth: 1-7/16"

(37mm)

• Cutout diameter: 3-3/8" (85mm)

GTO638

6-1/2" (160mm) 3-Way Loudspeaker

• Plus One ® (patent pending) woofer cone

• 1/2" (12mm) My-Ti ™ super tweeter

• 1" (25mm) edge-driven My-Ti tweeter

• Frequency response: 55Hz – 21kHz

• Sensitivity: 92dB

• Impedance: 2 ohms

• Power handling, RMS: 60 watts

• Power handling, peak: 180 watts

• Intermount III (patent no. 6,505,705) mounting system included

• Mounting depth: 2-1/16" (54mm)

• Cutout diameter: 5-3/16" (131mm)

GTO628

6-1/2" (160mm) 2-Way Loudspeaker

• Plus One ® (patent pending) woofer cone

• 1" (25mm) edge-driven My-Ti ™ tweeter

• Frequency response: 55Hz – 21kHz

• Sensitivity: 92dB

• Impedance: 2 ohms

• Power handling, RMS: 60 watts

• Power handling, peak: 180 watts

• Intermount III (patent no. 6,505,705) mounting system included

• Mounting depth: 2-1/16" (54mm)

• Cutout diameter: 5-3/16" (131mm)

GTO528

5-1/4" (130mm) 2-Way Loudspeaker

• Plus One ® (patent pending) woofer cone

• 1" (25mm) edge-driven My-Ti ™ tweeter

• Frequency response: 70Hz – 21kHz

• Sensitivity: 91dB

• Impedance: 2 ohms

• Power handling, RMS: 45 watts

• Power handling, peak: 135 watts

• Mounting depth: 2-3/8" (61mm)

• Cutout diameter: 4-3/4" (120mm)

GTO428

4" (100mm) 2-Way Loudspeaker

• Plus One ® (patent pending) woofer cone

• 3/4" (19mm) My-Ti ™ tweeter

• Frequency response: 90Hz – 20kHz

• Sensitivity: 90dB

• Impedance: 2 ohms

• Power handling, RMS: 35 watts

• Power handling, peak: 105 watts

• Mounting depth: 2" (54mm)

• Cutout diameter: 3-11/16" (93mm)

GTO18t

1" (25mm) Edge-Driven

My-Ti ™ Tweeter

• I-Mount ™ (patent no. 5,859,917) flush- and surface-mount hardware included

• Starfish ™ – easy tweeter mounting

• Frequency response:

2.5kHz – 21kHz

• Sensitivity: 92dB

• Impedance: 2 ohms

• Power handling, RMS:

50 watts**

• Power handling, peak:

150 watts**

• Mounting depth: 3/4" (19mm)

• Cutout diameter: 1-3/4" (45mm)

** with supplied high-pass crossover

GTO8608C

6" x 8"/5" x 7" 2-Way

Component System

• Plus One ® (patent pending) woofer cone

• 1" (25mm) My-Ti ™ tweeter

• I-Mount ™ (patent no. 5,859,917) flush- and surface-mount tweeter hardware

• Starfish ™ – easy tweeter mounting

• Outboard crossover system

• Frequency response:

55Hz – 21kHz

• Sensitivity: 92dB

• Impedance: 2 ohms

• Power handling, RMS: 70 watts

• Power handling, peak: 210 watts

• Mounting depth: 2-5/16" (59mm)

• Cutout diameter:

7-3/16" x 4-15/16"

(183mm x 125mm)

GTO608C

6-1/2" (160mm) 2-Way

Component System

• Plus One ® (patent pending) woofer cone

• 1" (25mm) My-Ti ™ tweeter

• I-Mount ™ (patent no. 5,859,917) flush- and surface-mount tweeter hardware

• Starfish ™ – easy tweeter mounting

• Outboard crossover system

• Frequency response:

55Hz – 21kHz

• Sensitivity: 92dB

• Impedance: 2 ohms

• Power handling, RMS: 70 watts

• Power handling, peak: 210 watts

• Intermount III (patent no.

6,505,705) mounting system included

• Mounting depth: 2-1/16" (53mm)

• Cutout diameter:

5-1/16" (129mm)

GTO508C

5-1/4" (130mm) 2-Way

Component System

• Plus One ® (patent pending) woofer cone

• 1" (25mm) My-Ti ™ tweeter

• I-Mount ™ (patent no. 5,859,917) flush- and surface-mount tweeter hardware

• Starfish ™ – easy tweeter mounting

• Outboard crossover system

• Frequency response:

70Hz – 21kHz

• Sensitivity: 91dB

• Impedance: 2 ohms

• Power handling, RMS: 55 watts

• Power handling, peak: 165 watts

• Mounting depth: 2-5/16" (59mm)

• Cutout diameter:

4-3/4" (120mm)

THE OFFICIAL BRAND

OF LIVE MUSIC.

Harman Consumer Group, Inc.

250 Crossways Park Drive

Woodbury, NY 11797

516.255.4JBL (4525) Fax: 516.682.3556 www.jbl.com

Features, specifications and appearance are subject to change without notice.

JBL, Grand Touring and Plus One patent pending are trademarks of Harman International Industries,

Incorporated, registered in the United States and/or other countries. UniPivot, My-Ti, Starfish and I-Mount are trademarks of Harman International Industries,

Incorporated.

Designed, edited and digitally produced by the

Harman Consumer Group Marketing & Design Center,

Woodbury, NY.

Part No. GTOSPKRPI1/09

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Frequently asked questions

JBL GTO speakers feature a patent-pending Plus One woofer cone, which provides increased bass output and efficiency.

JBL GTO speakers have 2-ohm voice coils, enabling them to extract maximum power from amplifiers or head units designed to increase power when driving 2-ohm loads.

The low-Q woofer design offers higher bass output and better transient response in typical mounting locations like doors and rear package trays.

Select JBL GTO models utilize a unique, patented rotating tweeter design, allowing the installer or end-user to aim the tweeter toward the sweet spot for optimal imaging.

The Intermount III mounting system allows for the installation of all 6-1/2" models in all four 6"-hole size standards without requiring additional adapters or installation kits.

Most JBL GTO speaker models feature integrated high- and low-pass filters, resulting in a smoother transition between the woofer and tweeter, delivering superior midrange performance.