In this April 13, 2016 article by Seven Days, there is a picture of Coons in his home studio. A GG-20R is in the background to the right of Coons' head.

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Featured in this Instagram post by Coons.

@musicofmadaila bass rig upgrade. Thanks @paddydukes for the calzone case. Vintage ampeg v-4b & svt 2x12.

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Featured in this Instagram post by Coons.

@musicofmadaila bass rig upgrade. Thanks @paddydukes for the calzone case. Vintage ampeg v-4b & svt 2x12.

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"Wall of sound at the studio tonight. It might get loud. Putting my new @suprousa Coronado 2x10 (top left) through the ringer..."

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Featured in this Instagram post by Coons, which specifies that it is modded.

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Jer Coons listed the Vox AD412 guitar amplifier cabinet for sale on Facebook, indicating his ownership.

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Jer Coons listed his Vox Valvetronix AD-120VTH with Foot Switch for sale on Facebook, indicating his ownership of the amplifier.

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Visible in this Instagram post by Coons.

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Visible in this Instagram post by Coons.

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Featured in this Instagram post by Coons.

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The camera zooms in on Coons' SVT-CL at 1:04.

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This is a community-built gear list for Jer Coons.

Find relevant music gear like Microphones, Guitars, Amplifiers, Effects Pedals, Bass Guitars, Drum Sets, Cymbals, Snare Drums, Drumsticks, Pianos, Keyboards and Synthesizers, Studio Equipment, Software Plugins and VSTs, Headphones, and other instruments and add it to Jer Coons.
The best places to look for gear usage are typically on the artist's social media, YouTube, live performance images, and interviews.
To receive email updates when Jer Coons is seen with new gear, follow the artist.