The MXR M239 Iso Brick Mini is an MXR overdrive pedal, currently around $99.99. Close alternatives include the Fender Mustang Micro Plus and the Dean Markley Overlord. It pairs well with the Fender Twin Reverb Head and the PRS DG Custom 30 David Grissom Signature 30W Head.
MXR M239 Iso Brick Mini
MXR · pedal
The MXR M239 Iso Brick Mini is a compact fully isolated power supply from MXR providing multiple independently isolated DC power outputs for powering pedalboard effects without ground loop noise. Fully isolated outputs prevent noise coupling between pedals, making it an essential infrastructure tool for quiet, professional pedalboard performance.
What stands out
“The compact format suits space-conscious pedalboards”
— from the community notes
“making it an essential infrastructure tool for quiet”
— from the listing
“Players who have experienced noise problems with non-isolated power supplies find fully isolated power a significant improvement”
— from the community notes
“Isolated outputs”
— from the reviews
“The compact format suits space-limited pedalboards”
— from the reviews
- quiet
- compact format suits
- non isolated power supplies
- fully isolated outputs
- isolated outputs
- independently isolated outputs
Price updated Oct 24, 2026
Amps that pair well with the MXR M239 Iso Brick Mini
Fender Twin Reverb Head
amplifier
13% matchWhat Fender Twin Reverb Head brings here leans toward dynamic — that's worth building a pairing around
Comes later in the signal chain
PRS DG Custom 30 David Grissom Signature 30W Head
PRS
12% matchPRS DG Custom 30 David Grissom Signature 30W Head leans toward dynamic, and that's a real, usable character to pair with
Comes later in the signal chain
Orange Little Bass Thing
Orange
tonal matchComes later in the signal chain
Put Orange Little Bass Thing after MXR M239 Iso Brick Mini
Friedman Small Box 50W EL34 Amp Head
Friedman
tonal matchComes later in the signal chain
Put Friedman Small Box 50W EL34 Amp Head after MXR M239 Iso Brick Mini
Revv Generator 120 MkIII 4-Channel 120W Head
Revv
tonal matchComes later in the signal chain
Revv Generator 120 MkIII 4-Channel 120W Head goes after MXR M239 Iso Brick Mini in the chain
Orange AD200B 200W Bass Head
Orange
tonal matchComes later in the signal chain
Orange AD200B 200W Bass Head goes after MXR M239 Iso Brick Mini in the chain
Ampeg Rocket Watts
Ampeg
tonal matchComes later in the signal chain
Ampeg Rocket Watts goes after MXR M239 Iso Brick Mini in the chain
Port City Pearl Head
Port City
tonal matchComes later in the signal chain
Put Port City Pearl Head after MXR M239 Iso Brick Mini
Pedals that stack with the MXR M239 Iso Brick Mini
ThorpyFX The Dane
ThorpyFX
8% matchWhat ThorpyFX The Dane brings here leans toward fuzzy — that's worth building a pairing around
Walrus Audio Eras
Walrus Audio
8% matchWalrus Audio Eras leans toward lush, and that's a real, usable character to pair with
Comes later in the signal chain
Electro-Harmonix Electric Mistress
Electro-Harmonix
7% matchRun Electro-Harmonix Electric Mistress after MXR M239 Iso Brick Mini in the signal chain, clear of MXR M239 Iso Brick Mini's own gain stage
Comes later in the signal chain
Ashdown Macchiato Compressor Guy Pratt Signature
Ashdown
6% matchWhat Ashdown Macchiato Compressor Guy Pratt Signature brings here leans toward compressed — that's worth building a pairing around
Comes earlier in the signal chain
Empress Echosystem
Empress
5% matchRun Empress Echosystem after MXR M239 Iso Brick Mini in the signal chain, clear of MXR M239 Iso Brick Mini's own gain stage — goes in the amp's FX loop (or last, into a clean amp)
Comes later in the signal chain
Alexander Pedals Radical Delay
Alexander Pedals
5% matchPut Alexander Pedals Radical Delay after MXR M239 Iso Brick Mini in the signal chain, clear of MXR M239 Iso Brick Mini's own gain stage — goes in the amp's FX loop (or last, into a clean amp)
Comes later in the signal chain
Matthews Effects The Pocket Drive Overdrive Boost
Matthews Effects
tonal matchMatthews Effects The Pocket Drive Overdrive Boost sits in the same chain slot as MXR M239 Iso Brick Mini
NuX Masamune Booster & Kompressor
Nux
tonal matchComes earlier in the signal chain
NuX Masamune Booster & Kompressor goes in front of MXR M239 Iso Brick Mini in the chain
Cheaper alternatives
Boutique & premium upgrades
Similar character
See all alternatives to the MXR M239 Iso Brick Mini (cheaper + boutique) →
Questions people ask
What are good alternatives to the MXR M239 Iso Brick Mini?+
The closest matches in character are the Fender Mustang Micro Plus, the Dean Markley Overlord, the Tone City Noisy Boy. Budget picks: Tone City Noisy Boy. Boutique upgrades: Providence HBL-4, Free The Tone SOV-2 Custom Shop, Bogner Burnley V2.
What pairs well with the MXR M239 Iso Brick Mini?+
Strong matches from rig and tone-complementarity evidence: Fender Twin Reverb Head, PRS DG Custom 30 David Grissom Signature 30W Head, Orange Little Bass Thing — What Fender Twin Reverb Head brings here leans toward dynamic — that's worth building a pairing around.
How much does the MXR M239 Iso Brick Mini cost?+
Around $99.99 (live listing price, updated Oct 24, 2026).