Guitar Pedals · owner-verdict comparison

MXR Carbon Copy vs Walrus Audio Slo: what real owners say

Real owners lean toward the Walrus Audio Slo: 88% of 307 owners recommend it, vs 71% of 31 for the MXR Carbon Copy.

Verdicts aggregated from Reddit, enthusiast forums, and YouTube owner comments — affiliate reviews excluded. Sample sizes differ; judge accordingly. How we score

MXR Carbon Copy

71%of 31 owners recommend
71% recommend · 13% neutral · 16% don't
Owners praise
  • Warm, natural-sounding analog delay tone that owners rank among the best analog delays available
  • Long-term reliability and loyalty, owners keep it for a decade or more, tour heavily with it, and keep returning to it after trying other delays
  • Underwhelming compared to alternatives for a minority of owners, some felt it didn't outperform other delays (like the analog settings on an FB/FB4) and ended up returning or replacing it
Owners complain about
  • Underwhelming compared to alternatives for a minority of owners, some felt it didn't outperform other delays (like the analog settings on an FB/FB4) and ended up returning or replacing it
Full owner report →

Walrus Audio Slo

88%of 307 owners recommend
88% recommend · 8% neutral · 4% don't
Owners praise
  • Lush, dreamy ambient reverb tones
  • Infinite sustain/latch footswitch for drones and pads
  • Favorite Dream mode beloved by owners
Owners complain about
  • Learning curve to dial in the sounds
Full owner report →

Which should you buy?

Get the MXR Carbon Copy if
  • ✓Players wanting warm, natural analog delay
  • ✓Guitarists after slapback and short echo settings
  • ✓Ambient players needing swells that preserve the dry signal
  • ✓Beginners who want simple, hands-on controls
Skip it if
  • Players needing versatility beyond one analog sound
  • Those wanting very long delay times
Get the Walrus Audio Slo if
  • ✓Ambient and shoegaze players wanting lush, dreamy reverb
  • ✓Players who want infinite sustain and latching drones
  • ✓Guitarists wanting deep ambience in little board space
  • ✓Synth users layering pads and textures
Skip it if
  • Players wanting standard spring, hall, or plate reverb
  • Thrash and metal players with no live use for ambience

What MXR Carbon Copy owners say

“Easily my favourite delay pedal!”
— @thejosebatista on YouTube
“Love the CarbonCopy.”
— @northof50now on YouTube
“j'ai acheté cet effet c'est loin d'être ça !”
— @francoisb4830 on YouTube

What Walrus Audio Slo owners say

“Yes this is the looking out the car window being sad sound I needed”
— @coolrecorderguy4206 on YouTube
“Oh god my wallet”
— @UncoolOcean on YouTube
“Walrus audio slo, I love the art but it's just another shitty Fv-1 reverb with uninteresting algorithms.”
— tails_the_gay_fox on Reddit

MXR Carbon Copy vs Walrus Audio Slo: frequently asked questions

Is the MXR Carbon Copy or the Walrus Audio Slo better?

Real owners lean toward the Walrus Audio Slo: 88% of 307 owners recommend it, vs 71% of 31 for the MXR Carbon Copy.

Who should get the MXR Carbon Copy?

Owners point the MXR Carbon Copy at players wanting warm, natural analog delay, and guitarists after slapback and short echo settings.

Who should get the Walrus Audio Slo?

Owners point the Walrus Audio Slo at ambient and shoegaze players wanting lush, dreamy reverb, and players who want infinite sustain and latching drones.

What do owners complain about?

The most-cited downside of the MXR Carbon Copy is underwhelming compared to alternatives for a minority of owners, some felt it didn't outperform other delays (like the analog settings on an FB/FB4) and ended up returning or replacing it. For the Walrus Audio Slo, it's learning curve to dial in the sounds.