Please see our COVID-19 Statement
StewMac EC Expander Pedal Kit

StewMac EC Expander Pedal Kit

StewMac EC Expander Pedal Kit With Bare Enclosure

With Bare Enclosure

Item # 2352
In stock, ready to ship!
20% OFF SALE

$87.85
$70.28

+
StewMac EC Expander Pedal Kit With White Enclosure

With White Enclosure

Item # 2352-W
In stock, ready to ship!
20% OFF SALE

$89.10
$71.28

+
 
Total:
Qty:
Scroll to Top

StewMac EC Expander Pedal Kit

About This Item

The secret weapon of a blues god
The EC Expander is a powerful mid-boost that will instantly supercharge the tone of your pickups, pedals, and more. Now you can finally get this tone in a pedal.

This pedal kit is our take on the famous Strat MDX control Eric Clapton installed on all of his guitars. With just the turn of a knob this powerful mid-boost changed his bright and sparkly single coils into creamy vintage PAF-style humbuckers.

Don't buy your next pedal—build it!
We loved this unique circuit so much we made it into a pedal kit. Now you don't have to modify your guitar—you can instantly add this tone to any instrument. Step on the pedal and your single coils sound fuller, and humbuckers sound richer and more dynamic.

But the pedal you build is not just a one-trick-pony! With just two knobs you've got endless ways to shape your tone. Add just a touch of mids to fill out your sound, or crank it to totally change the tone of your amp. And it stacks well with your favorite overdrive or distortion pedal for added flexibility. If you've got some drive or fuzz pedals that just turn to mush in the mix, adding some mids from the EC Expander will make these pedals come alive.

It's more than just a schematic
We include everything you need to build your new pedal:

  • Top quality components from resistors to switch
  • Road-worthy rugged metal enclosure with all holes pre-drilled
  • Bare or powder coated white finish
  • 3PDT breakout board for low noise
  • Input, output, and power jacks rear mounted for easy cable routing
  • True bypass switch
  • Custom printed labels
  • Easy! Download your instructions
    We've made these instructions ready to download now. You can zoom in on every solder joint and resistor value to make sure your build is perfect from start to finish. With these step-by-step instructions, full color illustrations, and complete wiring guide you'll build a pedal you'll enjoy for a lifetime. Be proud every time you step on the custom pedal that you built.

    Make your pedal your way
    It's never been easier to have an inspiring sounding and looking pedal. We include labels for all of the knobs for a professional look. Paint your own raw metal enclosure or choose a powder coated enclosure that is ready to put on your board now.

    Take the first step to customize your sound.



    CALIFORNIA PROPOSITION 65 WARNING
    WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.


    Video

    Instructions

    Product Instructions

    StewMac Pedal Kit Instructions

    Download the assembly guide and wiring diagrams.

    Customer Reviews

    • Excellent
    • Good
    • Average
    • Fair
    • Poor
    Write a review
    5.0
    • 4.73 average rating from 11 reviews
    Sort by
    5.0

    Fun to build, Fun to play!

    By

    Verified Buyer


    This kit was alot of fun to put together and thanks to the awesome instructions, a breeze to build! The circut is extremely responsive to your picking dynamics and has a wide variety of tonal options.

    5.0

    EC Expander is a worthwhile addition to your pedal board

    By

    Verified Buyer


    This little device really makes your single coil pickups jump out. Fattens the tone a bit and really boosts the signal even to the point of saturation. And this was on a solid state amp. Also works great with humbuckers.
    I had some initial problems with the kit but StewMac's customer service is 1st class. Tommy S. gave me everything I needed to finish the kit.
    I highly recommend this pedal, especially if you switch between double and single coils.

    4.0

    Sounds great after two minor setbacks

    By

    Verified Buyer


    The kit was missing a resistor. took 2 weeks to receive the part because for some reason the package was sent from new jersey to north Dakota before it finally arrived in new York. not stew macs fault but a set back. the final step is to install the input/output jacks. the holes in the enclosure were too small. I had to use a drill bit to enlarge the holes, which would not have been a big deal, but the circuit board was already installed in the enclosure. other than that the assembly was relatively straight forward, and the pedal sounds great ! I will definitely buy another pedal kit, and check the fitment of all components before assembly.

    5.0

    Fun to build - great sounding boost pedal.

    By

    Verified Buyer


    After final assembly, it gave no sound. I corresponded with Tommy, tech support. I sent him pictures. He helped me trouble shoot some suspect solder points and the fact I had swapped the two wires to the out put jack. After rewiring this, it works perfectly. My first pedal build. Fun, and good feeling of accomplishment. Thanks, Tommy! Great help! ...BTW: definitely get a magnifying visor.

    5.0

    Expander Pedal

    By

    Verified Buyer


    This was the first StewMAc kit I have assembled, though I have done a few from other sources. The EC Expander idea was appealing--not just another boost pedal. While the effect is subtle, it can be dialed in for a nice response on my Strat. I found your instructions easy to follow and the circuit set up well thought out. I usually use waterslide decals, but used the included adhesive decals on this one. Though thicker and a bit harder to align, they came out okay. Photo included.

    5.0

    Expanded as it should!

    By

    Verified Buyer


    First major electrical item I attempted and I am very happy with the pedal and the very easy to follow instructions.

    5.0

    Great Pedal for My First Build

    By

    Verified Buyer


    Knowing that I love that Clapton tone and that I wanted to try my first pedal build, this EC Expander was my choice. Building this little gem was as easy as following the online step-by-step instructions. My only issue was that I misfit one the the resistors in the wrong place and damaged it and the one that I tried to replace it with and had to order replacements. No Problem! The good folks at StewMac sent me replacements at no charge. If your eyesight is less than excellent, you may want to have a good multimeter on hand to check the resistance of the tiny colored bands. Otherwise just follow the directions. Oh yea! Once I put the finishing touches on this pedal I plugged it in and I could have sworn that Eric Clapton was in the room with me. A great add to my pedal board. Lastly, unless you must have a custom color, it was definitely worth it to get the repainted version for a couple of bucks more. My only beef with the kit is that the decals included should have had a DC power tag for the jack, so I made my own using a label maker. See the photos attached.

    5.0

    A fun build and a terrific pedal

    By

    Verified Buyer


    I bought this a few weeks ago as a project to do with my 13-year-old son. I figured we'd get to it one weekend this fall, but some plans changed and we needed something to do over the Labor Day weekend. We started it Sunday afternoon and he woke up Monday asking to finish it.

    My eyesight is terrible and I'm colorblind, so I knew any work with resistors would be tough for me. My son, though, had no trouble getting us organized, and did half the soldering himself. In fact, he could have done it all, but I wanted my turn! The directions were easy to follow, and the only two errors we found (more on that in a moment) were really easy to figure out.

    (Those two errors: One resistor and one cap weren't exactly as described. If I remember right, the diagram for the resistor was correct—it showed the right color bands—but the written-out colors were wrong. And one of the caps was supposed to contain some identifying printing that it did not. But we were able to figure it out by the process of elimination and confirm with a multimeter.)

    So, this thing was a blast to build, which is really all I hoped for.

    But then I plugged it in, and wow! This does EXACTLY what I hoped it would do, and sounds great doing it. Especially for the bluesy stuff I play (just for myself in the basement), this is a terrific pedal to take a great Strat or Tele rhythm tone and kick it into a full, cut-through-the-mix lead tone. I'm goin to really enjoy playing with this.

    5.0

    Mid-Boost !   Perfect for Strats !

    By

    Verified Buyer


    I took my time building this pedal. I had to use my opti-visor for all the soldering.
    And be careful ! I was really glad that I had my low power Soloman soldering iron. Perfect tool.
    Also I needed my "helping hands" apparatice . Parts are really small. Needle nose pliers a must.
    I am obsessive with my builds. (amps, guitars, etc.) The leads from the CB that attaches to the switch , ( the longer ones ) Make those just a little longer, maybe 1/2 ". Those are a little close.
    Everything else is good.
    This pedal works great ! I have a couple of Strats with vintage p/us, and this fattens the signal and pushes it up above the regular signal. Just like a foot tap volume control. I see why Eric C. wanted this. Just enough boost to put you out front, for your solos. Without a big change in tone.
    This is not a pedal that makes a huge change in your signal. ( unless you max out the control knobs !) (Which seems like some pedal only sound good when you do max the controls.)
    I like this pedal, and it has a spot on my pedal board. Thanks StewMac !
    JW

    3.0

    Good pedal, fun build, mismatched knobs

    By

    Verified Buyer


    This was my first pedal build, soldering is a bit hideous, but it still works great. As another reviewer said, reading the stripes on the tiny resistors is a challenge; I resorted to a multi-meter to ensure I was putting the right component in the right place. Tedious? Yes, but in a good way! My one disappointment was the mismatch between the two knobs...slightly different shade of red, slightly different size. I opted to order clear replacement knobs, which matched well with white/black/silver elsewhere.

    Showing 10 of 11 Read more reviews >>