Guitar Pedals · owner-verdict comparison

CS-3 Compression Sustainer vs MXR Carbon Copy: what real owners say

Real owners lean toward the MXR Carbon Copy: 71% of 31 owners recommend it, vs 43% of 70 for the CS-3 Compression Sustainer.

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

CS-3 Compression Sustainer

43%of 70 owners recommend
43% recommend · 27% neutral · 30% don't
Owners praise
  • Delivers a hard, audible squash and long sustain that owners on both sides of the argument describe the same way, so what a buyer gets is not in dispute
  • Tightens up clean and palm-muted rhythm playing, with several owners saying those parts sit better in a band mix with it on
  • Cheap and durable enough to stay on a board for years, including one owner who has not taken it off in nine
Owners complain about
  • Noise climbs with the sustain control, and owners repeatedly report hiss once the knobs pass the middle of their travel, worse with drive or fuzz in the chain
  • Squeezes the life out of the signal for a good number of owners, who describe flattened picking dynamics rather than subtle control
  • Eats the low end on bass, the most repeated complaint from bass players, several of whom had to add the lows back or replace the pedal outright
Full owner report →

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 →

Which should you buy?

Get the CS-3 Compression Sustainer if
  • ✓Players who want compression they can hear working, with long sustain, rather than an invisible peak trimmer
  • ✓Anyone tightening up clean or palm-muted rhythm parts so they sit better in a band
  • ✓Budget boards where a tough, cheap pedal that stays put matters more than refinement
  • ✓Bass players who want more bite up top and do not mind adding the lows back with EQ
Skip it if
  • Bass players who need the low end intact, since eating it is the most repeated complaint from that group
  • Anyone after a transparent always-on compressor that controls peaks without coloring the tone
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

What CS-3 Compression Sustainer owners say

“The CS-3 is what I want my compressor pedal to sound like. You can get that real squashy sound it's what you're looking for. Mine did eventually fail though, that bummed me out.”
— MLoxxer on Reddit
“Great pedal - somehow less noisy than pricier compressors but not as squishy, although it does the clanky compression very well. Also great as a boost on lower compression levels.”
— procraffinator on Reddit
“I used a Cs3 on my board for like 6 months and really wanted to like it but to me it's a piece of junk for the same reasons you said. Noise everywhere if you surpass the middle of the knobs.”
— carlitox3 on Reddit

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

CS-3 Compression Sustainer vs MXR Carbon Copy: frequently asked questions

Is the CS-3 Compression Sustainer or the MXR Carbon Copy better?

Real owners lean toward the MXR Carbon Copy: 71% of 31 owners recommend it, vs 43% of 70 for the CS-3 Compression Sustainer.

Who should get the CS-3 Compression Sustainer?

Owners point the CS-3 Compression Sustainer at players who want compression they can hear working, with long sustain, rather than an invisible peak trimmer, and anyone tightening up clean or palm-muted rhythm parts so they sit better in a band.

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.

What do owners complain about?

The most-cited downside of the CS-3 Compression Sustainer is noise climbs with the sustain control, and owners repeatedly report hiss once the knobs pass the middle of their travel, worse with drive or fuzz in the chain. For the MXR Carbon Copy, it's 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.