The Amptweaker Fat Rock is an Amptweaker overdrive pedal, currently around $269. Close alternatives include the Amptweaker AT Fatrock and the Amptweaker Big Rock Pro. It pairs well with the Milkman Sound Pint 10W and the Blackstar Series One 200.
Amptweaker Fat Rock
Amptweaker · pedal
The Amptweaker FatRock is a rock distortion pedal designed by James Brown as a warmer evolution of the TightRock, developed in response to player requests for a version better suited to brighter guitars and amplifiers. Compared to the TightRock, the FatRock extends the low range of the Tight and Tone controls, adds a fixed Fat boost at the front end for a slightly softer attack, and boosts the low-end in the output EQ. An EQ switch converts the tone stack to PlexEQ mode for classic vintage stack character. Three effects loops including the SideTrak loop active when the pedal is off allow complex routing.
What stands out
“Compared to the TightRock, the FatRock extends the low range of the Tight and Tone controls, adds a fixed Fat boost at the front end for a slightly softer attack, and boosts the low-end in the output EQ”
— from the listing
“The fixed Fat front-end boost means the attack softness cannot be fully removed; players who want TightRock-like attack with more low-end may find it slightly limiting”
— from the reviews
“Warm, fat rock distortion voiced for brighter rigs with extended lows compared to the TightRock”
— from the community notes
“Three effects loops including the SideTrak loop active when the pedal is off allow complex routing”
— from the listing
“best for hard rock and classic rock playing through naturally bright tube amps or single-coil guitars”
— from the community notes
Trade-offs
“making it a natural fit for bright fender-style amplifiers and single-coil guitars that can thin out with”
— from the reviews
- fat
- low end
- rock
- distortion
- boost
- warm
- bright
- classic rock
Price updated Oct 24, 2026
Genres the Amptweaker Fat Rock is commonly used in
- Rock
- Classic Rock
- Hard Rock
- Metal
cited
Inferred from shared tonal signals, not a stated genre tag. - Blues
cited
Inferred from shared tonal signals, not a stated genre tag. - Alternative
cited
Inferred from shared tonal signals, not a stated genre tag.
Amps that pair well with the Amptweaker Fat Rock
Milkman Sound Pint 10W
Milkman Sound
36% matchWhat Milkman Sound Pint 10W brings here leans toward high headroom — that's worth building a pairing around
Comes later in the signal chain
Blackstar Series One 200
Blackstar
tonal matchComes later in the signal chain
Run Blackstar Series One 200 after it and the bright edge settles into something more warm
Hiwatt Park P18LH 'Little 45' Handwired18W
Hiwatt
tonal matchComes later in the signal chain
Hiwatt Park P18LH 'Little 45' Handwired18W leans warm right where the bright tone needs it
Orange BT1000H Terror Bass 1000-Watt Bass Amp
Orange
tonal matchComes later in the signal chain
Run Orange BT1000H Terror Bass 1000-Watt Bass Amp after it and the bright edge settles into something more warm
Orange Terror Bass
Orange
tonal matchComes later in the signal chain
Orange Terror Bass's warm balances out the bright tone
Blackstar HT Stage 100H MK III Snakeskin
Blackstar
tonal matchComes later in the signal chain
Run mid-forward into Blackstar HT Stage 100H MK III Snakeskin for more high gain on top
Soldano Astro-20 Combo
Soldano
tonal matchComes later in the signal chain
Soldano Astro-20 Combo's smooth balances out the bright tone
Orange Little Bass Thing
Orange
tonal matchComes later in the signal chain
Orange Little Bass Thing leans warm right where the bright tone needs it
Pedals that stack with the Amptweaker Fat Rock
ZVEX Fuzz Factory
Zvex
13% matchfills a frequency gapFills in a frequency range the other side doesn't cover, instead of piling more onto what's already there. (bright → smooth)
ZVEX Fuzz Factory leans smooth right where the bright tone needs it
Comes later in the signal chain
Electro-Harmonix Big Muff Pi
Electro-Harmonix
13% matchfills a frequency gapFills in a frequency range the other side doesn't cover, instead of piling more onto what's already there. (bright → smooth)
Run Electro-Harmonix Big Muff Pi after it and the bright edge settles into something more smooth
Comes later in the signal chain
Hughes & Kettner Tube Rotosphere MKII The Analog Leslie Simulator
pedal
13% matchsits in the right chain slotPlaced for where it does its job cleanly in the chain, not for a tonal interaction with the anchor.
Run the Rotosphere's Leslie-style swirl after Fat Rock's own warm, bright attack settles, so the modulation moves a defined tone.
Comes later in the signal chain
Ashdown Velvet Compressor
Ashdown
10% matchfills a frequency gapFills in a frequency range the other side doesn't cover, instead of piling more onto what's already there. (bright → smooth)
Ashdown Velvet Compressor's own compressed character is the real reason this is worth trying
Comes earlier in the signal chain
Caroline Guitar Company Kilobyte
Caroline Guitar Company
8% matchsits in the right chain slotPlaced for where it does its job cleanly in the chain, not for a tonal interaction with the anchor.
Run Caroline Guitar Company Kilobyte after Amptweaker Fat Rock in the signal chain, clear of Amptweaker Fat Rock's own gain stage — goes in the amp's FX loop (or last, into a clean amp)
Comes later in the signal chain
Boss DD-3 Digital Delay
Boss
8% matchsits in the right chain slotPlaced for where it does its job cleanly in the chain, not for a tonal interaction with the anchor.
Put Boss DD-3 Digital Delay after Amptweaker Fat Rock in the signal chain, clear of Amptweaker Fat Rock's own gain stage — goes in the amp's FX loop (or last, into a clean amp)
Comes later in the signal chain
SolidGoldFX Commodore Breaker Overdrive
Solidgoldfx
tonal matchRun SolidGoldFX Commodore Breaker Overdrive after it and the bright edge settles into something more smooth
Caline CP-31 Hot Spice (Black)
Caline
tonal matchComes earlier in the signal chain
Caline CP-31 Hot Spice (Black) belongs in front of Amptweaker Fat Rock, since a wah tracks picking dynamics best on the raw signal
Cheaper alternatives
Maxon OD808
Maxon
59% similarityShared character: hard rock, boost, bass
Pigtronix Fat Drive
Pigtronix
57% similarityShared character: fat, warm
MXR Super Badass Distortion
MXR
54% similarityShared character: bright, boost, bass
Black Country Customs Monolith
Black Country Customs
53% similarityShared character: hard rock, bass, distortion
Bogner Burnley V2
Bogner
52% similarityShared character: fat, attack, hard rock
Tone City Big Rumble
Tone City
50% similarityShared character: fat, attack, boost
Boutique & premium upgrades
Similar charactersee all similar tone character →
Amptweaker AT Fatrock
Amptweaker
64% similarityShared character: noise gate, fat, hard rock
Amptweaker Big Rock Pro
Amptweaker
55% similarityShared character: fat, attack, hard rock
Fulltone OCD
Fulltone
51% similarityShared character: single coils, fat, hard rock
Ibanez TS9 Tube Screamer
Ibanez
51% similarityShared character: single coils, boost, bass
NuX Brownie
Nux
48% similarityShared character: hard rock, bass, response
Menatone None More Black
Menatone
47% similarityShared character: fat, hard rock, distortion
See all alternatives to the Amptweaker Fat Rock (cheaper + boutique) →
Questions people ask
What are good alternatives to the Amptweaker Fat Rock?+
The closest matches in character are the Amptweaker AT Fatrock, the Amptweaker Big Rock Pro, the Fulltone OCD. Budget picks: Maxon OD808, Pigtronix Fat Drive, MXR Super Badass Distortion. Boutique upgrades: Ibanez TS10 Tube Screamer Classic.
What pairs well with the Amptweaker Fat Rock?+
Strong matches from rig and tone-complementarity evidence: Milkman Sound Pint 10W, Blackstar Series One 200, Hiwatt Park P18LH 'Little 45' Handwired18W — What Milkman Sound Pint 10W brings here leans toward high headroom — that's worth building a pairing around.
How much does the Amptweaker Fat Rock cost?+
Around $269 (live listing price, updated Oct 24, 2026).