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Audiofrog GB40

GB Series 4" midrange car speakers (pair)

Item # 898GB40

If you haven't heard of Audiofrog yet, here's what you need to know – there's no one like them.

Find what Fits your car

If you haven't heard of Audiofrog yet, here's what you need to know – there's no one like them.

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Item # 898GB40

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$549.99 pair

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About the Audiofrog GB40

A big splash

If you haven't heard of Audiofrog yet, here's what you need to know – there's no one like them. We know, because we put their speakers to the test, side by side with some of the most celebrated car speakers in car audio. Track after track, with music that spanned many genres, Audiofrog's speakers made our jaws drop.

A big splash

If you haven't heard of Audiofrog yet, here's what you need to know – there's no one like them. We know, because we put their speakers to the test, side by side with some of the most celebrated car speakers in car audio. Track after track, with music that spanned many genres, Audiofrog's speakers made our jaws drop.

It's no coincidence. Audiofrog was founded by car audio veterans, who have been on the front lines of audio innovation for 30 years and have a rich, colorful history of crafting award-winning, custom car installations. Drawing on that substantial experience and their practical knowledge of what makes a great speaker, Audiofrog has created a no-nonsense, high-quality car audio line. While their speakers will fit into a large number of vehicles, Audiofrog's emphasis is definitely on custom installations.

GB40 bezel

Audiofrog provides a versatile bezel for custom installations, or simply unscrew and remove the speaker from the bezel to install in factory locations.

The toughest speaker in town

Audiofrog's GB40 4" midrange speaker sits in your palm with the weight of a stone -- there's not one plastic part in this speaker. Cast zinc housing protects the treated paper cone, which delivers all the complex midrange nuances that define the character of instruments and vocals. A copper polepiece cap helps extend frequency response and reduce distortion, making this little speaker a tough one to beat.

Such an efficient design puts the GB40 near the top of its class in the realm of power handling, with a rating of up to 100 watts RMS. Add in Audiofrog's grueling standards for real world speaker testing, and you can trust that the GB40 will live a very long life in your car.

Built for custom installations

Audiofrog was founded by experienced installers, who know all the pitfalls and shortcuts of custom installations. With the included metal mounting hardware, you'll find custom fabrication of a speaker location much easier. The all-metal finish of the GB40s removable ring can be polished, painted or upholstered, depending on your vision for your interior. The grilles are ideal for painting as well.

Audiofrog system recommendations

Here are some of Audiofrog's recommended uses for the GB40:

GB410C component system

2-way system -- GB10 1" tweeters, GB40 4" midrange speakers and GB410C crossover networks

GB410C component system

3-way system -- GB10 1" tweeters, GB40 4" midrange speakers, GB410C crossover networks, and GB60 6-3/4" midrange speakers (NOTE: GB60 will require its own amplifier)

GB415C component system

2-way system -- GB15 1-1/2" tweeters, GB40 4" midrange speakers and GB415C crossover networks

 
GB415C 3-way component system

3-way system -- GB15 1-1/2" tweeters, GB40 4" midrange speakers, GB415C crossover networks, and GB60 6-3/4" midrange speakers (NOTE: GB60 will require its own amplifier)

READ LESS

Highlights:

  • 4" treated paper speakers (pair)
  • versatile cast zinc housing
  • flush and behind-the-panel mounting kits with all metal parts
  • screw terminals
  • recommended crossover points: 110 Hz (high-pass) and 6000 Hz (low-pass)
  • removable grille mesh and trim ring can be painted
  • hex screws, keys and foam gaskets included
  • power handling: 20-100 watts RMS (300 watts peak power)
  • frequency response: 80-12,000 Hz
  • impedance: 4 ohms
  • sensitivity: 87 dB
  • flush-mount depth: 1-11/16"
  • warranty: 2 years
  • Our 60-day money-back guarantee
  • MFR # GB40

What's in the box:

  • 2 Midrange drivers
  • 2 Grille trays
  • 2 Backing rings
  • 2 Grille retainer rings
  • 2 Grilles
  • 2 Rubber grille U-channel gaskets
  • 2 Adhesive backed foam gaskets
  • Twelve M4x6mm Machine screws (four installed/ 3mm Allen head)
  • Sixteen M3x7mm Machine screws (2.5mm Allen head)
  • Eight 1-1/8" Self-tapping screws (3mm Allen head)
  • Sixteen 5/8" Self-tapping screws (2.5mm Allen head)
  • Eight 3/16" Self-tapping screws (2.5mm Allen head)
  • 3mm Allen head bit
  • 2.5mm Allen head bit
  • 2mm Allen wrench
  • 2 Gray audiofrog labels
  • 2 Black audiofrog labels
  • Instruction manual

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More details on the Audiofrog GB40

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Product Research

Features

Durability: The Audiofrog GB40 midrange drivers are tested in temperature and humidity extremes, as well as under vibration to simulate 50,000 miles of operation in a vehicle. The Nitrile-Butadiene Rubber (NBR) surround is resistant to ultraviolet rays, temperature extremes, and humidity to add to the speaker's reliability and longevity.

Multi Component Systems: Audiofrog matches sensitivity to voltage across all the midrange drivers in the GB series, making system tuning easy in multi-component systems. The GB40s are designed to mate with the GB10 tweeter (item number 898GB10, sold separately) using the GB410C passive crossover (item number 898GB410C, sold separately), or the GB15 tweeter (item number 898GB15, sold separately) using the GB415C passive crossover (item number 898GB415C, sold separately). They can also be used in active systems with the GB60 midrange (item number 898GB60, sold separately) and the GB10 or GB15 tweeter using an electronic crossover.

Note: The GB40 requires a band pass crossover. Audiofrog recommends a high pass setting no lower than 110 Hz and a low pass setting no higher than 6 kHz. The minimum recommended slope for both is 12 dB/octave.

Enclosure: If an enclosure is built for the GB40, Audiofrog recommends the internal volume be at least 3 liters (0.114 ft³).

Installation: Hardware is included for several mounting methods. The drivers can be top mounted behind factory grilles, top mounted using the included grilles along with the grille trays and backing rings, or bottom mounted using the included grilles and backing rings.

Screw Terminals: The screw terminals will accommodate up to 12-gauge speaker wire.

Dimensions: When not using a factory grille:

  Top Mounted Bottom Mounted
Frame Diameter 6.031" (grille tray) 5.683" (backing ring)
Cut-Out Diameter 3.5" 4.882"
Mounting Depth 1.55" 1.8"
Mounting Height 1.25" 0.625"

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