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Divided by 13 JRT 9/15

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Page last updated Aug 10, 2025

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Description

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Discover the Divided by 13 JRT 9/15, a guitar amplifier head that seamlessly blends vintage warmth with modern versatility. This amp head is a favorite among musicians who appreciate tonal flexibility and the ability to switch between two distinct power settings: 9 watts and 15 watts. The JRT 9/15 offers a unique dual-mode design that provides both a classic American tone and a rich British sound, all in one compact package.

Featuring a simple yet effective control layout, the JRT 9/15 includes volume, treble, bass, and master controls, allowing you to shape your sound with precision. The amp’s cathode-biased design ensures smooth transitions and dynamic response, making it a reliable choice for studio recording and live performances. With its point-to-point hand-wired construction, durability and superior sound quality are guaranteed.

The JRT 9/15 is also equipped with a tube-driven reverb, which adds depth and dimension to your playing. Musicians who require a versatile amp for various styles will find the JRT 9/15 a perfect companion, whether you're chasing clean, sweet tones or gritty, overdriven sounds.

Key Features:

Switchable between 9 watts and 15 watts
Dual-mode design for both American and British tones
Volume, treble, bass, and master controls
Cathode-biased for smooth transitions and dynamic response
Tube-driven reverb for added depth
Hand-wired, point-to-point construction for superior quality and durability

Product specs

Amp Type

tube

Videos

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ProGuitarShopDemos

Divided By 13 JRT 9/15

ProGuitarShopDemos

Divided by 13 - JRT 915 - Amplifier Demo

Brett Papa

Divided By 13 JRT 9/15 Demo w/ Lance Keltner

Vintage King

Novo Guitars - Serus T - With Divided By 13 JRT 9/15

LanceKonnerth

"Pick of the Day" - Patriarch Knight and Divided By 13 JRT 9/15

Emerald City Guitars

Divided by 13 Amp Comparison - JRT 9/15

Stereo Intellect

Divided By 13 JRT 9/15 w/ Lollar Strat Pickups

LanceKonnerth

Reviews

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Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Divided by 13 JRT 9/15.

Features and functionality

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The JRT 9/15 features dual power sections with 6V6 and EL84 tubes, offering versatile tonal options for different musical styles.
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User experience

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Owners appreciate the JRT 9/15 for its ability to achieve rich tones at lower volumes, addressing common volume concerns with larger tube amps.
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Comparisons

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The JRT 9/15 is often compared favorably to similar boutique amps like Bad Cat and Matchless for its tonal flexibility and build quality.
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Use cases and applications

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Ideal for bluesy-rock tones, the JRT 9/15 suits players inspired by artists like John Mayer and SRV, especially when paired with a Stratocaster.
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Critic Reviews

Review: Divided by 13 JRT 9/15 Amplifier | WIRED

wired.com

The Divided by 13 JRT 9/15 amplifier is a rock powerhouse that expertly blends vintage aesthetics with modern capability. Its dual power tube setup allows for versatile tonal options, making it suitable for everything from rockabilly to psychedelic sounds. Praised for its solid construction and impressive sound, it has garnered a loyal following, including notable artists like U2's the Edge. However, its compact size may mislead some into underestimating its volume and power. Overall, this amp delivers significant sonic punch in a small package, though its unique features might not appeal to all players.

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Artist usage

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Chris Cornell

Guitarist, Singer

Soundgarden

Verified via YouTube

Chris Cornell frequently used the Divided by 13 JRT 9/15 guitar amplifier head, paired with 2 x FTR 37 cabinets, during performances with Soundgarden. This setup is visible in footage from their 2010 Lollapalooza performance, as captured in a video by Alexandre Fontenele on YouTube.

Ichika

Guitarist, Bassist

Dios

Verified via ギター・マガジンWEB｜Guitar magazine

A Japanese article regarding Ichika's live setup with his band Dios shows that he used a stack version of the JRT 9/15.

Rusty Anderson

Singer, Guitarist

Paul McCartney (Live Band)

Verified via MusicRadar

“I have a lot of amps, but right here’s a Vox AC30 head from 1965, and then there’s Divided By 13 915. Under that is an early ‘70s Marshall Super Bass, and last but not least, a Laney Supergroup from the early ‘70s.”

Christopher Cross

Guitarist, Singer

Ringo Starr & His All-Starr Band

Verified

According to the gear page on his official website, Christopher Cross uses his signature Divided by 13 JRT 9/15 CCC amplifiers both live and in the studio.