Tag Archives: volume

Mike & Mike’s Pot[entiometer] Dispensary

IMG_6151-impby Michael James Adams

I… I really struggled to make a good joke there. I’m sorry for how lame that was.

So, we have this wonderful little Tumblr site where I keep a log of just about everything that I work on. Tumblr is easily one of the most fun blogging sites out there, and the community we’ve found there is so much fun. I’m constantly surprised to not only see our number of followers consistently rising, but also the amount of interaction we’re receiving. Day-in, day-out, we’re getting messages from all over the world asking for advice about pickups, setup techniques, which colors we like and why we’re so damn fond of Jazzmasters.

At times it’s daunting to answer all of the messages, but I LOVE it anyway; it is simply amazing to me that we can connect with other musicians across the globe, all of us united by our mutual enjoyment of gear. And to you reading on this website (mmguitarbar.com), it’s good to have you as well! I can’t believe anyone reads this drivel. You’re like secret Santas, every last one of you.

Among the topics raised, one of the most frequently asked questions goes something like this: “Why does my guitar not sound good? I replaced the pickups with [insert quality brand] and it still sounds like [insert expletive].”

Now that sounds familiar, doesn’t it? I’ve been there before myself, swapping pickups for new units that cost a decent percentage of my take-home pay, only to find my tone slightly improved; that’s a frustrating, seemingly hopeless place to be in.

IMG_3949-impSo what gives? You buy the pickups of your dreams, unsolder as few connections and you’re suddenly underwhelmed with your purchase. I mean, sometimes that’s because what you bought wasn’t that great to begin with, but in today’s age of Youtube demos and Rig Rundowns, guitar players are far more educated–tonally speaking–than ever. More and more, it seems highly unlikely that most of us would spend money without knowing what to expect. We’re extremely blessed to have the Lollars, Novaks, Creameries, Bareknuckles, Rio Grandes, Fralins and Duncans of the world toiling away so that we can all sound better!

What seems far more likely to me is that while we’ve all been focusing on pickup problems, we have perhaps carelessly overlooked something perhaps even more detrimental to our sound: the wiring harness.

Yes, it’s true: you could have the world’s greatest pickups ever made–some would argue a set of ’59 Gibson PAFs–and your guitar could still sound muffled and altogether dull if the electronics suck. Allow me to explain, and if you don’t mind I’m going to pick on Gibson a little bit just because I hear about this issue most commonly with regard to humbucker-equipped guitars. I find that, with the exception of P90s, most players don’t complain as often about dark single coils. Sry.

Conventional tonal wisdom states that most single coils sound best with 250K pots because these pickups have a wider tonal spectrum than ‘buckers, meaning they generally put out a wider range of treble and bass frequencies than most humbuckers, which cancel hum but also some of the common frequencies picked up by each coil. That pot value effectively sets a cap or dam, if you will, as to the amount and frequency range of the treble available, so you end up with a clear and balanced pickup that won’t hurt your ears, dig?

If you use 250K pots with a humbucker, what you end up with is a pickup that lacks clarity and detail, and is devoid of snappy highs and tight lows. This muddier signal is EXACTLY the reason so many of us prefer 500K pots with humbuckers*, which allow more treble through and produces a drastically clearer and fuller sounding, erm, sound. So that’s why Gibson guitars generally come stock with 500K pots.

Except they generally don’t; Gibson, like any other company, has to save money any way they can so they can offer a product with enough profit margin to blah blah blah business stuff. Everyone does this, and if Gibson’s buying bulk potentiometers, they can save a bit of money on each part by loosening the tolerance. Most standard pots have a +- 20% tolerance, but for a little more money you can easily find pots ~ 5-10%.IMG_3339-imp

So Gibson-branded pots that claim to be 500Ks? Yeah, it’s highly likely that they aren’t. Whenever a customer of mine tells me their guitar sounds muddy or isn’t sounding the way they imagined, one of my first fixes is to replace the pots, and so I measure their actual, real-life rating with a multimeter and the results are surprising.

You remember our buddy, Nick? He’s the one that brought me his newish Explorer back in 2012, a lovely guitar in that alluring naturalburst finish. He’d swapped pickups 3 times with similarly disappointing results, so I measured his Gibson-branded, stock 500K pots and guess what? They measured at almost exactly 300K ohms. That’s (I am so bad at math but I think this is right) a 40% deviation from the rating on the side of the damn pot! Sadly, this is not the first time this has happened; sometimes I’ll find a pot hovering between 450 and 420 [insert drug humor] and sometimes as low as 370, but 300K? Damn, son!

As mentioned in this older article, I measured out a set of pots that were within reasonable tolerance from their rating (most were within 5-7%) and built a new harness. Upon installation, the difference was dramatic, to say the least; the previously muddy, ill-defined signal was replaced by an articulate tone, replete with note separation and clarity. Trebles were snappy, the midrange was airy and open, and the bass was just as thumpy as our hopes and experience led us to believe. To this day, Nick frequently tells me that his guitar is now what he always wanted it to be.

So, if your guitar sounds as if its wearing the roughest of Irish sweaters and could use some tonal refinement, before you swap pickups please consider having your electronics replaced as well. Because really, if you’re spending the money on killer pickups but leaving stock, out-of-spec electronics inside your guitar, you won’t be hearing those expensive pickups properly.

wiring50sAnd while you’re on the hunt for a good set of pots (we like CTS, Bourns and sometimes Alpha) please follow this wiring diagram**, which is the proper 1950’s style wiring that Gibson used on their holy grail instruments. I attribute the coveted ‘59 Burst sound not only to the wood and pickups, but also this scheme, which differs from modern wiring in the way the tone caps hook up and the way in which the tone pot is grounded. This makes a HUGE difference, and unless a customer specifies otherwise, this is the diagram I recommend using for most jobs. Seymour Duncan has a great blog explaining the differences in layman’s terms, and I’d also recommend using a treble bleed/volume mod network across the 1 and 2 lugs of the volume pot. Link goes to my favorite, but you can easily build them with your own parts.

In conclusion, the way in which your guitar is wired can have a huge effect on the way your guitar sounds. The things discussed in this article are somewhat simplified, but I can say with complete honesty that this trick as worked literally every time I’ve tried it, on both my personal guitars and those of my customers. Give it a shot! Don’t trust me? Look how cool Nick felt after I swapped out his wiring harness. He felt so good he didn’t give a crap about traffic.


Nick is a traffic-hating badass. He’s crazy. He’ll point his guitar at you and everything. He doesn’t give a crap.

* Your mileage may vary, but most of us do prefer 500ks.
** The diagram omits ground connections for the bridge/tailpiece stud and to each pot.
*** Things come better in threes.
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Whoa… Busy Month and a Blacktop Jazzmaster

It’s been quite a while since our last post, but for good reason: we have been the busiest we’ve ever been. Not only are our wares selling like hotcakes (Fortune 500 here we come?) but there has been a marked increase in patrons to our humble store. Some come in for work on their prized amp or guitar, some come to browse, and a few come in just to have a drink and hang out – exactly the kinds of things we’re about!

When you own a shop in a street-level garage that’s around 500 square feet, two or more customers can make it feel very, very busy. Add to this the army of gear we’ve acquired and a veritable mountain of repairs, and I think you could begin to infer just how busy we’ve been.

Even so, I thought I’d take this opportunity to update both the website and our faithful readers on just what the heck we’ve been doing this holiday season. I mean, it’s not all eggnog and carols and flasks of whichever alcohol we’re drinking these days!

The Modified Fender Blacktop Jazzmaster

IMG_1897-impDecember marked the end of a months-long project, one that took far longer to complete than I had expected. Why? Well, it’s because of that dad-blasted Gold Foil.

Our friend John (the owner of this fine machine) saw what we did ages ago with the Skyemaster and wanted something similar but tweaked to his personality. Two additional pickups were to be installed – a total of four on the guitar – to augment the already wide range of tones available to him. He provided a cool old Framus/Guyatone pickup for the middle position, and installing that required routing out the body and pickguard. Pretty straightforward.

However, John was really into the ethereal, otherworldly sounds that came from the Skyemaster’s behind-the-bridge unit, so finding a thin, small pickup that would fit under the adjusted string length of this model was a bit of a problem. We eventually decided that an old Dearmond/Rowe Gold Foil would do the trick, but that would present its own challenge: finding one for a good price.

John and I agreed that, with the recent spate of popularity surrounding these pickups, it would be a game of waiting to pounce on an under priced pickup to keep his already high costs down. I was more than happy to save my customer some money, but between searching and all of the other jobs I’ve had, it started to feel hopeless there for a bit. Luckily, after some time I was able to track one down that was in need of a rewind.

From then on it was smooth sailing. Here’s a brief rundown of what we have going on with this one:

-Stock neck and bridge pickups
-Added Guyatone/Framus pickup in the middle position
-Gold Foil (no base) mounted directly to the wood, no routing required!
-Three way toggle functions normally (N, NB, B)
-Two additional pickups are selectable via two push-pull pots on the Volume (middle) and Tone (behind-the-bridge) pots

So, how does it sound? It’s amazing. The middle pickup lends a quacky sort of darkness to the overall characteristics of the stock pickups, and the BTB unit enables all of the weird, Waterphone-like tones you’d expect. This is certainly one of my favorite mods, and it’s surprisingly useful. I’ll get around to doing this to my own guitar soon enough, I’m sure. Wanna hear how it sounds? Check it out:

There are three more videos detailing some of the quirky sounds available via the modified electronics. Feel free to watch!

I’m going to do a couple more quick updates in the next few days or so. Keep your eyes peeled! Lots more cool stuff on the way!

UPDATE: Special thanks to our pals over at Ampersand Amplification for this custom meme! We think it’s appropriate!


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Raise Your Action: A Plea

Finding the balance: low action = easy playability, higher action = great tone.

I know this is going to sound counter-cultural to those in tune with the guitar world at large, but here goes: raise your action.

*Deep breath*

I’m as much a fan of low, slinky action as the next guy, so far be it from me to make judgements and decrees like I’m the de facto leader of the free musical world. It’s just a friendly suggestion, one that I’ll detail below before anyone can throw wah pedals at my head.

Depending on your playing style, low action could be the order of the day. For example, playing fast licks in a metal band is usually well-served by having the lowest action possible on your axe. Most of us like our guitars to play like ‘butter’, as easy as it possibly can be so nothing gets in the way of our fingers. I’m that way, too.

Many of us look for low action as the sign of a good set up, but we so easily forget that strings need room to vibrate in order to make sound. The strings on our guitars vibrate much more wildly than we can see with the naked eye. Because of this, raising your action even slightly will allow notes to ring out with more body and fullness, and you might also find that sustain has increased. The benefits don’t stop there!

In the case of acoustic instruments, the bigger payoff might also be the increase in volume that comes from higher action. If you follow this blog (and I hope that you do) you’ll know that I was recently cast in a theatrical production of a show called This Land, a play not so much about the great Woody Guthrie as much as it is about what he saw and wrote about. In my humble and slightly biased opinion, it’s a beautiful show, and one in which I’m extremely proud to play a part.

The show is performed entirely acoustically, meaning there are no mics around to reinforce the sound we’re making on stage. This was initially vexing for me as my poor Gibson J-45, once crushed during an overseas flight, was having trouble keeping up. Since the accident, the guitar didn’t sound as good as it used to, with spongy response and terrible intonation. And, because the guitar suffered cracks and loose braces, the top had bowled up, making it nearly impossible to play comfortably unless the saddle was bottomed-out. Without that downward pressure on the saddle, the guitar sounded anemic and quiet.

During the first week of rehearsals, Music Director Edd Key asked me to take a solo in the song “This Land”. I played my heart out, but no one heard it over the banjo and other guitars playing along. This bummed me out to no end, and so I finally found the reason I’d been looking for to perform a neck reset on the guitar. I had been putting off the procedure for some time, but this was the only way to achieve playable action whilst retaining a tall saddle, which is key for projection and good tone.

Even though I’ve done this many times, there was still an “Oh, shit!” moment waiting for me once I had the neck off of my guitar.

Weeks later, when the neck reset was complete, I cut a new bone saddle for the guitar but made certain to keep it as high as I could without making the guitar unplayable. Even before I had chosen a final saddle height, strumming an open E chord yielded a huge increase in projection and dynamics, with all of the midrange fullness I had been missing.

I experimented for days looking for the perfect string height, taking the guitar home between performances to shave down the saddle, and once grafting on a tiny sliver of bone to the bottom of the saddle when I accidentally went a little too far. Now, where my guitar once was splashy and lacking detail, it’s loud and authoritative, with note definition and that low-mids thump I associate with great Gibson acoustic guitars. My guitar sounds livelier, more present, and now I’m happy to report that I have the opposite problem of perhaps having too much volume. I’m only using the guitar on three songs in the show now because I’m afraid of overpowering vocals or other instruments!

I’ve settled on an action that’s higher, but not too high. My low E is around .110″ above the 12th fret, and the high E is just a bit lower at .090″. This is just a bit higher than recommended by Gibson’s factory specs, and a huge difference from the .065″/.050″ E-e split I had going on before. When I was plugging in most of the time, I didn’t really notice the acoustic tone I was getting, so that worked out fine for me. I don’t mind a touch of buzz and I’m hard on the guitar, so I thought nothing of it.

The increase in action did give me some trouble initially with regards to playability. It took some time for my hands to get used to this stiffer action, but after a week of rehearsals (this is a 4-5 hour affair each night) I thought nothing of it. I’m getting around just as easily as before, but now I’m actually being heard! And it’s had a wonderful impact on my electric skills as well, enabling me to be a bit quicker and more precise. That’s a tune we can all dance to!

I told you this story to illustrate some of the benefits of higher action on acoustic guitars, but the same truths apply to electrics as well. The action on my electric guitars is considerably lower than on my acoustics, but even a half-turn of the thumb wheel on a TOM bridge can have a huge impact on tone, feel and sustain. Ever feel like your guitar doesn’t have enough punch in the lower register? Try raising your action by .010″ and see if it doesn’t help. Also, dialing in a bit of relief in the neck can help there as well.

Of course, string height also alters your setup, and if you stick with it you may want to adjust intonation and pickup height to taste. For now, give it a shot as-is, and see what you think. For me, this little change makes a huge difference. Once the show’s over I’ll likely take the action back down a tad, but for now the balance of playability and projection is top-notch for my needs, and I’m having a lot more fun with the guitar than I used to.

Maybe raising your action isn’t for you, but try to think outside of the low action=good guitar bias we all live with. You may find that tone you’ve always heard in your head waiting for you on the other side!

-Michael James Adams

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