John Mayer Two-Rock Amp Settings
John Mayer's tone is built around restraint. The Two-Rock Custom Reverb Signature provides enormous clean headroom that lets the Stratocaster's single-coil character bloom without interference. The Klon Centaur, always on, adds transparent presence rather than distortion. The result is a sound that sounds simple but demands precision in every part of the signal chain.
The Amp: Two-Rock Custom Reverb Signature
The Two-Rock Custom Reverb Signature (CRS) is a high-end boutique amp designed in the tradition of the Dumble Overdrive Special — warm, clean, with a natural tube compression that sustains without saturating. Mayer has used various Two-Rock models across his career, primarily the CRS and the Standard Reverb.
Two-Rock CRS Clean Channel settings:
Volume: 6
Bass: 5
Mid: 5
Treble: 6
Presence: 5
Reverb: 3
The Volume at 6 is in the sweet spot where the Two-Rock's output tubes begin to provide natural compression without distortion — bloom and sustain without saturation. This is the "sag" in the power amp that gives Mayer's clean tone its warmth.
The Klon Centaur (Always On)
The Klon Centaur is set as a transparent presence booster, not an overdrive:
Drive: 0 (minimum — fully counter-clockwise)
Output: 3–4 o'clock (significantly boosted)
Treble: Noon
At zero drive, the Klon's gain stage produces almost no added distortion. But its output section adds approximately 6–12dB of clean boost that pushes the Two-Rock's input stage harder. The result is a warmer, more present signal without obvious distortion — the Klon's famous "transparent" character.
This is the same concept as SRV's Tube Screamer — the pedal boosts the amp, the amp does the distorting (if any).
The Tube Screamer (Lead Boost)
A second Ibanez TS808 or equivalent is used as a lead boost on top of the Klon:
Drive: 2
Level: 3 o'clock
Tone: Noon
This adds the midrange push characteristic of the Tube Screamer, making lead lines cut through the mix. The combination of Klon (transparent boost) + TS808 (mid-forward boost) into the Two-Rock clean is the layered boost structure that defines Mayer's lead tone.
Signal Chain
Guitar → Strymon OB.1 Compressor → Klon Centaur → Tube Screamer TS808 → [other effects] → Two-Rock CRS
The compressor (Strymon OB.1 or similar) comes first — its gentle compression evens out picking dynamics and adds sustain. Settings:
- Comp: 30–40% (gentle, not obvious)
- Output: matched to unity gain
Accessible Amp Alternatives
Fender Deluxe Reverb (22W)
The most accessible substitute. Volume at 5, Treble 6, Bass 4, Middle 5, Reverb 3. Add Klon-style pedal (KTR, Tumnus, Archer) with Drive at 0 and Level boosted. This gets approximately 75% of the Two-Rock character.
Carr Rambler
A boutique amp in the same price class as the Two-Rock that approaches similar clean headroom and natural compression.
Fender Blues Deville
At Volume 5, Bass 4, Middle 5, Treble 6, the Deville's 60W provides more clean headroom than the Deluxe. Add Klon-style boost.
Guitar Settings
Mayer plays primarily with a Stratocaster — various Fender Custom Shop and signature models. Key settings:
- Pickup position: Neck or neck/middle (positions 1 or 2 on a 5-way switch)
- Volume: 10 (full — guitar volume reduction is not part of his standard clean tone approach)
- Tone: 7–8 (slightly rolled back for warmth)
The neck pickup's inherent warmth combined with the Two-Rock's clean headroom creates the characteristic "blooming" quality of his clean tone.
Replicating on Modellers
Line 6 Helix
Amp: Matchstick Ch2 or Twin Reverb model (highest clean headroom)
Drive 0, Bass 5, Mid 5, Treble 6, Presence 5, Volume 7
Add: Klon model (always on, Drive 0, Output 70%), TS808 model (lead boost), OB.1-style compressor model first in chain.
Fractal Axe-FX III
Amp: Two-Rock model (if available) or Dumble ODS clean channel
Add Klon model + TS808 model in chain. Compressor first.
Why Two Boost Pedals Stacked at Low Settings Beats One at Higher Settings
It would seem simpler to use a single boost pedal at a moderate setting rather than layering a zero-drive Klon with a low-drive TS808 — but the two pedals are doing genuinely different jobs. The Klon's role is a broad, transparent presence lift that works constantly across the entire performance; the TS808's role is a targeted, mid-forward push specifically for lead lines that need to cut through. Combining them gives Mayer independent control over "always-on warmth" and "lead-specific cut" as two separate variables, rather than compromising with one pedal trying to do both jobs simultaneously.
This layered-boost structure is the same underlying principle as SRV's and Gary Moore's pedalboards covered elsewhere on this site, but Mayer's specific two-stage version is worth understanding on its own terms — it's not redundant, each pedal is solving a distinct problem.
Common Mistakes
Using only one boost pedal and expecting both the constant warmth and lead-cutting qualities. As explained above, the Klon and TS808 serve genuinely different functions — a single pedal, however good, has to compromise between the two roles rather than handling both independently.
Rolling back guitar volume for dynamic control, as SRV does. As the guitar settings section notes, Mayer keeps volume at full for his standard clean tone approach — unlike several other blues-influenced players covered on this site, guitar volume reduction isn't part of his core technique.
Skipping the compressor at the front of the chain. As the signal chain section shows, the Strymon OB.1 (or similar) comes first specifically to even out picking dynamics before the boost pedals — omitting it makes the rest of the chain respond less consistently to picking variation.
Assuming any Stratocaster position works equally well. As the guitar settings note, neck or neck/middle position (1 or 2 on a 5-way switch) is central to the "blooming" clean quality — the brighter bridge-heavy positions common in other styles work against this specific tone.
ToneStakr's Take
For players building this tone, get a genuinely clean, high-headroom amp (a Fender Deluxe Reverb is a realistic starting point) before worrying about an exact Two-Rock — the amp's clean headroom at a moderate, slightly-compressing volume matters more than the specific boutique brand. Add a Klon-style pedal at true zero drive as the first priority pedal purchase, since it's providing the constant foundational character; the TS808 lead boost and compressor are genuine refinements but less foundational than getting the always-on transparent boost right.
Frequently Asked Questions
What is Mayer's "secret" to his clean tone?
The Two-Rock Custom Reverb Signature's enormous clean headroom, which lets the Stratocaster's single-coil character bloom naturally without amp interference — most players can approximate a meaningful portion of this with a clean Fender Deluxe Reverb and the same layered-boost pedal approach.
What Stratocaster does Mayer play?
Multiple guitars across his career, including a 1964 Stratocaster, a Fender Custom Shop "Black One," and his PRS Silver Sky signature model — all typically played in neck or neck/middle pickup position for the warmer, blooming tone central to his sound.
What is his Tube Screamer setting?
Similar in concept to Stevie Ray Vaughan's approach — low drive (around 2, not zero), medium-high output, used as a targeted lead boost layered on top of the always-on Klon rather than as a primary distortion source.
How important is his playing position and technique?
Very — Mayer plays with his thumb wrapped over the neck to mute and fret bass notes, a technique that contributes significantly to his distinctive chord voicings and percussive rhythm attack, independent of any specific gear choice.
Is the Strymon OB.1 compressor essential, or can it be skipped for a simpler rig?
It's a genuine refinement rather than an absolute requirement — its gentle, subtle compression evens out picking dynamics before the signal reaches the boost pedals, but a player prioritizing budget can achieve a reasonably close core tone without it and add it later.
Why does Mayer use a Klon rather than a simpler clean boost pedal?
The Klon's specific circuit, even at zero drive, adds a subtle harmonic coloration that many players describe as warmth or "life" beyond what a purely transparent buffer or generic boost provides — this specific character, not just the volume increase, is part of why it's become his signature always-on pedal.