The MXR CSP038 Brown Acid Fuzz is an MXR fuzz pedal, currently around $169.99. Close alternatives include the Zvex Fuzz Factory P025 and the EarthQuaker Devices Hoof Hybrid Fuzz. It pairs well with the Magnatone 280 and the Gibson Les Paul LP-1 Preamp.
MXR CSP038 Brown Acid Fuzz
MXR · pedal
The MXR Custom Shop Brown Acid Fuzz is a premium boutique fuzz pedal from MXR's Custom Shop series, delivering rich, psychedelic fuzz character with a name referencing the famous Woodstock warning about the brown acid. The Brown Acid targets warm, harmonically complex psychedelic fuzz character suited to vintage rock and psych playing.
- psychedelic
- vintage
- rock
- fuzz
- boutique
- experimental
- american
- reliable
Price updated Aug 27, 2026
Genres the MXR CSP038 Brown Acid Fuzz is commonly used in
- Experimental
- Rock
- Psychedelic Rock
cited
Inferred from shared tonal signals, not a stated genre tag. - Noise Rock
cited
Inferred from shared tonal signals, not a stated genre tag. - Alternative
cited
Inferred from shared tonal signals, not a stated genre tag. - Classic Rock
cited
Inferred from shared tonal signals, not a stated genre tag.
Amps that pair well with the MXR CSP038 Brown Acid Fuzz
Pedals that stack with the MXR CSP038 Brown Acid Fuzz
Zvex Seek Trem
Zvex
21% matchKeep Zvex Seek Trem after MXR CSP038 Brown Acid Fuzz in the signal chain, clear of MXR CSP038 Brown Acid Fuzz's own gain stage
Walrus Audio Ages
Walrus Audio
18% matchWalrus Audio Ages stacks clean boost on top of the fuzzy already here
Pigtronix Octava
Pigtronix
18% matchPigtronix Octava layers octave onto an already fuzzy signal
Pigtronix Echolution
Pigtronix
12% matchPut Pigtronix Echolution after MXR CSP038 Brown Acid Fuzz in the signal chain, clear of MXR CSP038 Brown Acid Fuzz's own gain stage — goes in the amp's FX loop (or last, into a clean amp)
Walrus Audio Melee Wall of Noise Black
Walrus Audio
12% matchKeep MXR CSP038 Brown Acid Fuzz's fuzzy voice out front: Walrus Audio Melee Wall of Noise Black goes after MXR CSP038 Brown Acid Fuzz in the signal chain so its ambient voice doesn't muddy it — goes in the amp's FX loop (or last, into a clean amp)
Acoustic Strymon Compadre Dual Voice Compressor
Acoustic
10% matchRun the Compadre before the Brown Acid Fuzz for transparent, studio-grade compression before that vintage psychedelic fuzz kicks in.
SolidGoldFX Oblivion
Solidgoldfx
tonal matchSolidGoldFX Oblivion stacks octave on top of the fuzzy already here
Caroline Guitar Company Parabola State Tremolo
Caroline Guitar Company
tonal matchCaroline Guitar Company Parabola State Tremolo stacks clean boost on top of the fuzzy already here
Cheaper alternatives
Electro-Harmonix J Mascis Ram's Head Big Muff
Electro-Harmonix
66% similarityShared character: fuzz
Orange Coat Fuzz
Orange
65% similarityShared character: fuzz, rich, vintage_charm
Carl Martin Purple Moon V2
Carl Martin
64% similarityShared character: fuzz, vintage_charm, boutique_stuff
JHS Ross Fuzz
JHS Pedals
94% similaritysimilar tone character
Jackson Audio Fuzz Page MKII- Plug -IN
Jackson Audio
93% similaritysimilar tone character
Catalinbread Giygas Gold
Catalinbread
92% similaritysimilar tone character
Boutique & premium upgrades
Similar charactersee all similar tone character →
Zvex Fuzz Factory P025
Zvex
68% similarityShared character: fuzz, vintage_charm, boutique_stuff
EarthQuaker Devices Hoof Hybrid Fuzz
EarthQuaker Devices
67% similarityShared character: fuzz, rich, vintage_charm
Matthews Effects The Whaler
Matthews Effects
64% similarityShared character: fuzz, rich, boutique_stuff
Black Arts Toneworks Forest
Black Arts Toneworks
64% similarityShared character: fuzz, vintage_charm
Beetronics OC-BS
Beetronics
93% similaritysimilar tone character
Mad Professor Fire Red Fuzz
Mad Professor
93% similaritysimilar tone character
See all alternatives to the MXR CSP038 Brown Acid Fuzz (cheaper + boutique) →
Questions people ask
What are good alternatives to the MXR CSP038 Brown Acid Fuzz?+
The closest matches in character are the Zvex Fuzz Factory P025, the EarthQuaker Devices Hoof Hybrid Fuzz, the Matthews Effects The Whaler. Budget picks: Electro-Harmonix J Mascis Ram's Head Big Muff, Orange Coat Fuzz, Carl Martin Purple Moon V2. Boutique upgrades: Benson Amps Deep Sea Diver, Roger Mayer Visage 45.
What pairs well with the MXR CSP038 Brown Acid Fuzz?+
Strong matches from rig and tone-complementarity evidence: Magnatone 280, Gibson Les Paul LP-1 Preamp, Zvex Seek Trem — Put Magnatone 280 in front and the fuzzy tone leans further toward modulated.
How much does the MXR CSP038 Brown Acid Fuzz cost?+
Around $169.99 (live listing price, updated Aug 27, 2026).