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MXR M238 Iso-Brick Power Supply Pedal Adapter

Young Music Shop

(86085)

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US $149.99

Approximately£111.46

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Condition:

New

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Free USPS Priority Mail®.

Located in: Maple Plain, Minnesota, United States

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Estimated between Mon, 25 Aug and Fri, 29 Aug to 94104

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30 days return. Seller pays for return postage.

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eBay item number:167680494506

Last updated on 29 Jul, 2025 21:10:47 BSTView all revisionsView all revisions

Item specifics

Condition: New: A brand-new, unused, unopened and undamaged item in original retail packaging (where packaging ...

Model: Iso-Brick Power Supply

UPC: 710137086654

About this product

Product Identifiers

Brand

MXR

MPN

M238

GTIN

0710137086654

UPC

0710137086654

Model

MXR Iso-Brick M238

eBay Product ID (ePID)

13032514714

Product Key Features

Voltage

18 V, 9 V

Additional Product Features

To Fit

Pedalboard, Acoustic Electric Guitar, Bass Guitar, Electric Guitar

Item description from the seller

Seller business information

I certify that all my selling activities will comply with all EU laws and regulations.

About this seller

Joined Aug 2002

Registered as a business seller

Quality musical instrument accessories

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Detailed seller ratings

Average for the last 12 months

Accurate description

5.0

Reasonable postage cost

5.0

Delivery time

5.0

Communication

5.0

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i***n (272)- Feedback left by buyer.
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Verified purchase
Doesn't have all options but is very good for price and convenience. Seller quick shipment.

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Product ratings and reviews

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4.9

56 product ratings

52 users rated this 5 out of 5 stars
3 users rated this 4 out of 5 stars
1 users rated this 3 out of 5 stars
0 users rated this 2 out of 5 stars
0 users rated this 1 out of 5 stars

Would recommend

Good value

Enjoyable

Most relevant reviews

See all 42 reviews

by christianm5638
20 Jul, 2021Most favourable review
Amazingly quiet and sweet features considering the price
I was using a one spot for about 7 pedals, which I honestly didn’t think was that noisy. When I finally pulled the trigger on this brick, I was floored by the difference…silence. No feedback, noise, nor hum was audible. Yes, that’s what it supposed to do, but it’s also lightweight and has 2 18v inputs, which ultimately was the selling point for me. Although it didn’t fit underneath my pedalboard (metro 24), I velcroed it in between pedals and its fine. Granted, I’ve only had it for a few weeks, but it’s MXR, so the quality is there. Decently priced compared to most power supplies, but even some of the pricer ones have less features! So worth it!I was using a one spot for about 7 pedals, which I honestly didn’t think was that noisy. When I finally pulled the trigger on this brick, I was floored by the difference…silence. No feedback, noise, nor hum was audible. Yes, that’s what it supposed to do, but it’s also lightweight and has 2 18v inputs, which ultimately was the selling point for me. Although it didn’t fit underneath my pedalboard (metro 24), I velcroed it in between pedals and its fine. Granted, I’ve only had it for a few weeks, but it’s MXR, so the quality is there. Decently priced compared to most power supplies, but even some of the pricer ones have less features! So worth it!
Verified purchase: YesCondition: Pre-ownedSold by: *pitbullaudio*
by imwrenscott
07 Sep, 2021Most critical review
Didn’t fix my hum.
I am running several pedals into my half stack Vai Legacy tube amp and getting a hum mainly from my boost pedal and compressor/sustain pedals. I bought a Furmin power conditioner and then the iso brick but still have a hum. I guess I’ll just have to get a noise gate? (my old one died, maybe from too much noise! Lol). I researched several isolated power supplies and I believe this is a good value, but didn’t solve MY problem. It may solve yours, but it’s hard to recommend something that didn’t help me.I am running several pedals into my half stack Vai Legacy tube amp and getting a hum mainly from my boost pedal and compressor/sustain pedals. I bought a Furmin power conditioner and then the iso brick but still have a hum. I guess I’ll just have to get a noise gate? (my old one died, maybe from too much noise! Lol). I researched several isolated power supplies and I believe this is a good value, but didn’t solve MY problem. It may solve yours, but it’s hard to recommend something that didn’t help me.
Verified purchase: YesCondition: Pre-ownedSold by: *pitbullaudio*
by bennyjames44
20 Jul, 2017
Nice brick.
This little unit seems of high quality. I was using an adapter with a daisy chain of 9 volt supply for my guitar pedals and i was getting a buzz in the audio. This mxr iso-brick solved that problem very well. I especially like the fact that a couple of the ports in the brick have adjustable voltage knobs. I think this is very useful for those who have a couple pedals that might require a different voltage. The little blue lights allow the player to see which wires have active connection, so that takes some of the guesswork out of troubleshooting. Very pleased with this and i felt 128 bucks was a very good deal for new product with all the little wires included. Kind of glad i ponied up the little bit extra for a superior product rather than get stuck with a lesser power supply.This little unit seems of high quality. I was using an adapter with a daisy chain of 9 volt supply for my guitar pedals and i was getting a buzz in the audio. This mxr iso-brick solved that problem very well. I especially like the fact that a couple of the ports in the brick have adjustable voltage knobs. I think this is very useful for those who have a couple pedals that might require a different voltage. The little blue lights allow the player to see which wires have active connection, so that takes some of the guesswork out of troubleshooting. Very pleased with this and i felt 128 bucks was a very good deal for new product with all the little wires included. Kind of glad i ponied up the little bit extra for a superior product rather than get stuck with a lesser power supply.
Verified purchase: YesCondition: NewSold by: myrliquidations
by vintageampman
20 Jan, 2019
Flawless B Stock MXR M238 ISO Brick
MXR M238 ISO Brick. Flawless B stock, no physical flaws visible. Better than the original I purchased a couple years ago. Original V trimmers were not straight and had these foam rings to keep from turning in transit or by accident. This new version trimmers are straight, must be upgraded pots. No foam ring surrounds. New version LEDs have switched positions from the original brick. LED main power indicators are reversed from the original bricks. I also noticed when powering down the original brick's main caps take significantly longer to discharge. Not an issue, just an observation. LEDs fade longer on the original. I checked voltages on all outs, all within spec. Solid cable connections. I tested resistance from like + and - connections from one out to another with power up, infinite ... MXR M238 ISO Brick. Flawless B stock, no physical flaws visible. Better than the original I purchased a couple years ago. Original V trimmers were not straight and had these foam rings to keep from turning in transit or by accident. This new version trimmers are straight, must be upgraded pots. No foam ring surrounds. New version LEDs have switched positions from the original brick. LED main power indicators are reversed from the original bricks. I also noticed when powering down the original brick's main caps take significantly longer to discharge. Not an issue, just an observation. LEDs fade longer on the original. I checked voltages on all outs, all within spec. Solid cable connections. I tested resistance from like + and - connections from one out to another with power up, infinite ohms on all tested. Guess it is indeed isolated outs, really good deal for sure.
Verified purchase: YesCondition: Pre-ownedSold by: specialty_traders
by glenn466
29 Mar, 2018
Just about good as new
Good value, works perfect. Really more connections than I need. Will fit under my new pedalboard fine. I think the only imperfection was one of the pins on the box itself was a little bent. No big deal, still works on that pin.
Verified purchase: YesCondition: Pre-ownedSold by: specialty_traders

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MXR M238 Iso-Brick Power Supply Pedal Adapter

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Item specifics

About this product

Product Identifiers

Product Key Features

Additional Product Features

Item description from the seller

Seller business information

Young Music Shop

99.8% positive Feedback•181K items sold

Detailed seller ratings

Popular categories from this shop

Seller Feedback (91,614)

Product ratings and reviews

Most relevant reviews

Amazingly quiet and sweet features considering the price

Didn’t fix my hum.

Nice brick.

Flawless B Stock MXR M238 ISO Brick

Just about good as new

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Young Music Shop

99.8% positive Feedback•181K items sold

Detailed seller ratings

Popular categories from this shop

Seller Feedback (91,614)