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MXR Custom Audio Electronics MC404 Wah Guitar Effects Pedal

The MXR Custom Audio Electronics MC404 Dual Inductor Wah Pedal lets the most discerning players choose from two distinct wah-wah tones, with emphasis on the high end or on the low to mid range.


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MSRP: Old Price $242.85 Discounted Price $169.99 Save : $72.86 (30%)
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MSRP: Old Price $242.85 Discounted Price $169.99 Save : $72.86 (30%)
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MXR and Custom Audio Electronics founder Bob Bradshaw—two names that have shaped the tones of the world’s greatest guitarists—join forces to bring you a dynamic new line of pedals. The Boost/Overdrive and Boost pedals are the first offerings in the series produced by MXR, featuring the unique sonic stamp of legendary designer Bob Bradshaw. Since 1980, CAE’s innovative pedal designs were made in limited quantities only for his select clientele. When it was time to bring these pedals to the masses, there was only one name he could trust to deliver the same quality and standards that his customers demand—MXR.

The MC404 CAE Dual Inductor Wah was developed by Bob Bradshaw of Custom Audio Electronics and the Cry Baby design team with the goal of creating the most versatile wah-wah pedal on the market. For three decades, Bob Bradshaw has been one of the foremost designers of custom guitar pedalboards and effects systems for high-profile guitarists around the world.

The MXR MC404 CAE Wah ends the debate over which Fasel inductor makes for a better wah tone: red vs. yellow. This pedal features both red and yellow Fasel inductors with two distinct voices (red for clear high-end emphasis or yellow for a more gritty tone with low to mid resonance). The MC 404 CAE allows you to choose between inductors with side-mounted kickswitches; bright LEDs on each side of the pedal indicate operation status. A built-in MXR MC401 Boost/LineDriver adds even more flexibility and kicks your tone into overdrive when you need a boost for soloing. The MC404 boasts true hardwire bypass, a long-life CTS potentiometer, and internal pots for "Q" and gain adjustments.

  • Select between a Yellow or Red Fasel Inductor for two distinct tones.
  • True bypass.
  • Side mounted switch activates preset boost.

Power: Dunlop ECB003 AC Adapter or Single 9-volt battery (not included)

Add a new sonic dimension to your playing with the MXR Custom Audio Electronics MC404 Wah. Get yours from Sam Ash Direct today with the security of our 45/60 day return/price protection policy and our fast, free shipping.

Things You Will Get:

  • Effect Pedal

Most versatile wah


Most versatile wah out today and tons of tonal options



Love it.


So much fun, great sound and feeling. All the options and features give you lots of different possibilities.



Great Wah, Great Experience.


Salesman was very knowledgeable , offered me options, understood the difference between them. Let me demo all, and worked out great for me.



Great wah under $150!


Been through many wah pedals and besides the RMC 10 this is the next best wah. Very versatile!



True bypass and two wah tones


No brainer purchase for me. A couple things I really like- true bypass, two options for wah tone, and the built-in boost. The wah options give you classic Cry-Baby or something more along the lines of possibly the Bad Horsie. I was very pleased that it is very easy to toggle between these two options live-. You just kind of kick the pedal knob on the side, so easy you could use both tones in the same tune with ease. Both wah tones are very good, useable tones.



Custom Audio Electronics MC404 Wah Guitar Effects Pedal

4.8 5


Series Wah
Model MC404

MC404 CAE Wah Manual

Warranty Info:

Custom Audio Electronics MC404 Wah Guitar Effects Pedal

The manufacturer's warranty covers parts for one year and labor for one year from date of purchase. The warranty excludes damage from misuse, abuse, and contains other exclusions.