Crimson Audio Yellow SM57/SM58 Modification

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Product Code: 8400
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Crimson Audio Yellow SM57/SM58 Modification

The Crimson Audio Yellow SM57/SM58 Modification is a custom tuned transformer modification for your Shure SM57/SM58, already mounted in a replacement handle. This modification handle offers a deeper low end, smooth balanced mids, and an open airy clear top end, with a slightly hotter output - perfect for sources you want to have cut.

The Crimson Audio Yellow SM57/SM58 Modification really changes and elevates the SM57 and SM58. We all know, own, and love the Shure SM57 and Shure SM58. Whether a home studios or a professional studios, the SM57 and SM58 have been go to mics for guitar cabs, snare drums, vocals, and more. However, we sometimes want a little more richness, depth, or air from these mics. Sometimes we want a little less, like a little less mid honk. Well enter Crimson Audio Transformers. Crimson Audio (along with the help of Front End Audio), has designed great transformers (pre loaded in replacement handles) to evolve you SM57 and SM58!

The Crimson Audio Transformers Yellow is a true hot rod mod for the Shure SM57 and Shure SM58. It gives a deeper low end, smooth balanced mids, and an open airy and clear top end. Furthermore it provides a much hotter output, giving a forwardness and real energy to the tracks. If you want powerful guitars, strong and cutting snare, or detailed hi-hats, this is the Shure SM57 and Shure SM58 mod for you. The Crimson Audio Transformers Yellow will make you fall in love all over again. It's like Nitrous for your Shure SM57 and Shure SM58.

This unique mod is not only affordable, but easy to do yourself. It only takes a couple mins, and some very basic soldering skills.

This mod also works with the Granelli Audio Labs G5790! Front End Audio has gone the extra mile to make this an al la carte that is super simple.

1) Pick your Crimson Audio mod
2) Pick your Shure cartridge (if you are not installing on a preexisting mic)
3) Add a Granelli Labs 90 degree conversion kit (or not)
4) Install the mod (or build it, if getting a new cartridege)
Alternative 4) Let us install the mod for you (if you don't want to install it yourself).
5) Enjoy!

When you want us to build the mic (or install it on a cartridge you provide, for a small service fee, we will QC the parts, assemble the mic, QC the finished mic, and get it on the way to you - so you can just rock and roll right out of the box.

Don't forget about the killer White.SM, Orange.SM, Blue.SM mods, brought to you from Crimson Audio and Front End Audio!

Call 888-228-4530 or email us at if you have any questions.

Crimson Audio Yellow SM57/SM58 ModificationFeatures

  • Custom Transformer, Preloaded in replacement handle
  • Multi-filar windings
  • Ten sections of interleaving
  • Provides:
    • Pronounced mid and upper mid response (without being harsh)
    • Brings the material forward in a mix
  • Wires are color coded same as the SM57/SM58

What We Think

The Crimson Audio Transformers Yellow is a serious hot rod mod for the 57 & 58. I found it a pleasure to be part of the testing of the prototype, and it exceeded my expectations. I'm not really a mod guy, but if it makes a significant difference, then I am willing to try it. The Yellow is impressive. It is like a whole new mic. The hotter output adds energy and power, there is a deeper low end, smooth and balanced mids, and an open top end that adds clarity to the mic. Yet, the mod tames the bite. No more hairiness, and no more honk. This is almost like turning your 57 & 58 into a great condenser mic, but with the smoothness of a dynamic.

- Ryan - Pro Audio Sales Manager, Front End Audio

Click here to view all Crimson Audio products

13 Reviews Hide Reviews Show Reviews

  • 5
    crimson handle

    hook this baby up to a 545 capsule. very nice for live gig

  • 5
    Excellent upgrade!

    Fuller sounding than my stock 58. Sweet sparkly highs and a deeper low-end. Anxious to try the white mod on the 57 I use for snare!

  • 5
    This is what I always wanted a 57 to sound like

    I’ve never been a big 57 fan. They’re fine for certain things and handy to have in an emergency, but I’ve never understood the love that some people have for them. The Yellow flips the script. Smooth and mighty with just the right amount of bite. It’s probably going to live in front of my Vibro-Champ for the foreseeable future, but I’m looking forward to trying it on other sources. the guitar sound I had in my head. I bought the separate handle/head version and it took about 1 minute to solder. Highly recommended.

  • 4
    Yellow SM mod

    This mod works for the Shure 565 “Woodstock” mic.

  • 5
    Mic Mod Review

    Fantastic! A great idea that really beefs up the sound. It helps the instruments jump out of the mix more. I would certainly purchase another one of these. Great!

  • 5
    Well worth it!

    The yellow mod is wonderful! It adds a level of fidelity I did not expect to hear. So much so that I recorded a voiceover with it. On a snare drum, pure magic. The airiness of the top end gives such a polished and complete tone. I love it!

  • 4
    AB tests inconclusive

    Easy install! I set the new Crimson up against another stock SM57 placed as identically as possible on snare, then on guitar speakers, running through a matched pair of Manley preamps with the levels set identically. SSL Alphalink conversion into a Trident 8T console monitor section sending to Adam A5x/Sub8, Focal Alpha65 and Avantone mixcubes. Cycling through monitors and switching tracks in a blind test, I couldn't hear a noticeable difference on any source. To be fair, I haven't spent enough time with it to determine if there's some subtle difference I'm missing. I track a lot of rock and pop, and usually blend a ribbon and a 57 or a vintage Sennheiser on guitars, and a 57 or 421 with a BeyerDynamic condenser on snares. I don't think the upgrade will make any discernible difference in a mix. It was an interesting experiment, but not one that I would spend the money to repeat.

  • 4
    no opinion yet on the sound, but...

    I haven't had an opportunity to try this bad boy out yet, but I like how you guys roll. Packaging was well done, promptly shipped with a little hand written note, too! I'll return once I've had some ears on this Yellow thang.

  • 5
    Best thing in 15 years!!!

    Never have I ever had such an overnight improvement and electricity come to the studio as I had once I received my 57 with the yellow mod and paired it with the "Mogaine." Absolutely speechless. Under $300 and I had an unstoppable chain. Actually used the combo on vocals for a session--and the 57 was chosen over high-end $2000+ mics. Get this, then get the Mogaine...and get ready to start REALLY making it happen in the studio. Stupendous on guitar amps. Quite simply...perfect.