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Description

Designed in collaboration with John Mayer, the PRS J-MOD 100 is more than just an amplifier; it's a tonal powerhouse tailored for the discerning guitarist. This 100-watt, single-channel amp stack is characterized by its switchable gain stage, allowing players to transition effortlessly from clean, glassy tones to harmonically rich leads. Equipped with four 12AX7 preamp tubes and four 6L6 power tubes, it promises a sonorous range that suits both live performances and studio recordings. The inclusion of a Cinemag Texas 100 transformer ensures an output full of depth and clarity, making every note resonate with unparalleled articulation.

The J-MOD 100's tone stack, featuring Treble, Mid, and Bass controls, along with a Bright switch and Presence control, offers a versatile palette for sculpting your ideal sound. Its design philosophy prioritizes both quality and ease of maintenance, with accessible fuses and bias points on the back panel, allowing for hassle-free adjustments.

Crafted with meticulous attention to detail, this amplifier showcases five separate circuit boards, minimizing flex during transport and maximizing signal integrity. An effects loop adds further flexibility, making it easy to integrate external reverb and other effects, controlled via an included footswitch. Whether you're channeling Mayer's iconic style or forging your own path, the PRS J-MOD 100 stands ready to amplify your musical journey with exceptional precision and richness.

Key Features:

  • 100-watt, single-channel design with switchable gain stage
  • Series effects loop for seamless effect integration
  • Cinemag Texas 100 output transformer for rich harmonic output
  • Rear-panel access points for easy maintenance
  • Compatible with various tube types, including EL34, 6CA7, and KT77 (requires re-biasing)
  • Includes 2-button footswitch for effects loop and gain boost control

Product specs

Brand PRS
Model J-MOD 100 John Mayer Signature 100-Watt Guitar Amp Half Stack
Finish Stealth Black / Salt & Pepper
Year 2017 - 2020
Made In United States
Categories Guitar Amp Stacks
Electronics Tube
Impedance 16 ohms, 4 ohms, 8 ohms
Number of Channels 1 Channel
Number of Inputs 1 Input
Output Power (Watts) 100
Power Tube Type 6L6
Reverb None
Speaker Configuration 2x12"

FAQs

What kind of tubes does the PRS J-MOD 100 use?

The PRS J-MOD 100 utilizes four 12AX7 tubes in the preamp section and four 6L6 tubes in the power amp section. It also supports EL34, 6CA7, or KT77 tubes with re-biasing.

Is the PRS J-MOD 100 suitable for live performances?

Yes, the PRS J-MOD 100 is a 100-watt tube amp, providing ample power for live performances, especially in larger venues.

Does the PRS J-MOD 100 include built-in reverb?

No, the PRS J-MOD 100 does not feature built-in reverb.

What are the impedance options available on the PRS J-MOD 100?

The PRS J-MOD 100 offers impedance options of 4, 8, and 16 ohms, making it versatile for different speaker configurations.

How does the PRS J-MOD 100 handle effects?

The PRS J-MOD 100 includes a built-in effects loop, allowing you to integrate external effects seamlessly into your signal chain.

Andertons Music Co

Andertons Music Co

John Mayer Signature Amps – Two Rock vs PRS J-MOD100

Video thumbnail for John Mayer Signature Amps – Two Rock vs PRS J-MOD100 by Andertons Music Co

John Mayer Signature Amps – Two Rock vs PRS J-MOD100

Andertons Music Co

Andertons Music Co

Video thumbnail for The J-MOD 100 | PRS Guitars by PRS Guitars

The J-MOD 100 | PRS Guitars

PRS Guitars

PRS Guitars

Video thumbnail for PRS J-MOD 100 John Mayer Signature 100-watt Tube Head Demo by Sweetwater

PRS J-MOD 100 John Mayer Signature 100-watt Tube Head Demo

Sweetwater

Sweetwater

Video thumbnail for J-MOD 100 Controls Walk-through | PRS Guitars by PRS Guitars

J-MOD 100 Controls Walk-through | PRS Guitars

PRS Guitars

PRS Guitars

Video thumbnail for PRS J-MOD 100 John Mayer Signature 100-watt Tube Head Playthrough by Sweetwater

PRS J-MOD 100 John Mayer Signature 100-watt Tube Head Playthrough

Sweetwater

Sweetwater

Video thumbnail for Paul Reed Smith (PRS) J-MOD 100 John Mayer Amplifier by intheblues

Paul Reed Smith (PRS) J-MOD 100 John Mayer Amplifier

intheblues

intheblues

Video thumbnail for Two Rock Amps vs PRS J MOD 100 Mayer Amplifier featuring Dr. Ric by intheblues

Two Rock Amps vs PRS J MOD 100 Mayer Amplifier featuring Dr. Ric

intheblues

intheblues

Video thumbnail for PRS J-MOD100 John Mayer Signature Amp Head | Review by Guitar Interactive Magazine

PRS J-MOD100 John Mayer Signature Amp Head | Review

Guitar Interactive Magazine

Guitar Interactive Magazine

Reviews

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about PRS J-MOD 100.

Comparisons

  • The J-MOD 100's cab design is compared to a Bassman and Bandmaster cab, suggesting potential cost-effective alternatives like Mojotone for similar performance.

    Source
  • A PRS 4x10 cab with similar specs to the JM 4x10, including 10” Greenbacks and a solid pine build, is available, differing mainly in grille cloth color.

    Source
  • The J-MOD 100 is described as having a "sparkly" tone, distinguishing it from the Two Rock Crystal, which is based on JM's signature model.

    Source

Features and functionality

  • The J-MOD 100 lacks a built-in reverb, which has been noted as a curiosity given John Mayer's typical setup preferences.

    Source
  • The amp is noted for its ability to emulate the "boutique-y, loud, harmonically rich" sound of John Mayer's previous setups, including Two-Rock and Dumble influences.

    Source
  • Despite lacking reverb, the amp emphasizes versatility by integrating elements from Mayer's past amp preferences, aiming for a comprehensive tonal range.

    Source

User experience

  • Users note that the amp's performance can be affected by speaker impedance mismatches, with 8ohm speakers providing more volume than 16ohm in testing scenarios.

    Source

Use cases and applications

  • The J-MOD 100 draws attention due to its rarity and high price, making it a conversation starter and a target for upselling attempts in music stores.

    Source
  • The J-MOD 100 is implied to be designed for professional musicians, particularly those aiming to replicate John Mayer's touring tones.

    Source

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Artist usage

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See how John Mayer uses PRS J-MOD 100

John Mayer

Guitarist

John Mayer Trio

...
Verified via Prsguitars

"No compromise amp designed with John Mayer.

The J-MOD 100 amplifier was intimately designed by Paul Reed Smith, Doug Sewell, and John Mayer to not only handle Mayer’s live work with Dead & Company, but to also move seamlessly into recording and performing Mayer’s solo work. With a thoughtful control platform, impeccable build, and high-quality components, the J-MOD 100 is a fully-realized, high-end piece of audio gear for players who want the purest and most expressive musical experience. Thoughtful control platform and feature selection.

The J-MOD 100 amplifier is a single channel amp featuring a switchable gain stage and effects loop. The amp’s tone stack features a beautiful, spread out tone that is at once huge and clear. When the gain stage is kicked in, the amp gets rich in harmonics and delivers a bit more bite. The versatility provided by this setup allows the J-MOD 100 to deliver a huge variety of sounds whether using singlecoils or humbuckers. Additional tone-sculpting features include a bright switch, which adds more high-end to your tone, and a presence control that boosts the high-end in the power amp section of the amplifier, giving you a livelier, more complex tone. There is no reverb built into the J-MOD 100, but an effects loop was requested by Mayer for his reverb tanks. The amp’s effects loop (and gain boost) is controlled by the footswitch, so players can use any reverb or effects unit desired with this amp. Elegant and robust construction.

The J-MOD 100 amp features five separate boards, all with over-sized traces for tonal integrity. Each board is dedicated to a particular part of the circuit: preamp section, power section, front panel controls, bias jacks, and the effects loop. Not only is this an elegant way to build with fewer long wires extending across a larger board, it is also a more robust way to build as there is not a single, large board that needs to flex during transport. The amp is hand-wired at PRS in Maryland, USA with a truly artistic level of craftsmanship. The J-MOD 100 also features a “laydown-style” power transformer for build integrity. High-quality components.

The J-MOD 100 pairs hand-crafted construction with top-of-the-line components, including a Cinemag output transformer and high-end capacitors in the preamp section. The result is authentic vintage tone with rich harmonics that sit at the player’s fingertips for a thoroughly expressive and transparent musical experience. Built with serviceability in mind.

Mains fuse, B+ fuse, and bias adjustment jacks are accessible on the back panel of the amp, so changes and adjustments can be made without needing to open up the amplifier. In addition, the amp will accept many different power tubes types, including EL34, 6CA7, KT77 (with re-bias)"

This amp´s purpose was to be served on tour with Dead & Company (a band that consist of the remaining members of Grateful Dead featuring John Mayer) accompanied by the PRS Super Eagle to pay tribute and get the Jerry Garcia tone (former solo guitarist of Grateful Dead, now deceased). As John mentioned in the PRS press conference at NAMM 2017, this amp was tweaked to also serve his solo career; more specifically the John Mayer Trio (featuring Steve Jordan on drums and Pino Palladino on bass).

Genre Usage

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