Alnico magnets and guitar pickups – How to choose?

The heart of any electric guitar is the pickup, and pickups play a huge role in the overall sound of any guitar. So it only makes sense that when players look to improve their sound, the pickup is the most common modification. There are dozens of reputable pickup makers to choose from; from large volume producers like Seymour Duncan – who virtually invented the aftermarket pickup market – to boutique winders making vintage style pickups with OCD-like fervor. And to a great degree they are all working with the same basic materials: Wire, magnets, screws, and various methods to hold it all together.

Arcane Strat Special Pickup

For an item of such critical sonic importance, there are not many ways to quantify their design. Besides the typical specification of DC resistance, which is a function of wire gauge and number of turns of wire, magnet type is the other most commonly specified feature of a pickup. The choices are typically a ceramic magnet or some type of Alnico, which stands for Aluminum, Nickel and Cobalt. Alnico magnet materials have been around for decades, and are the material of choice for the majority of high quality pickups. The benefits of Alnico material is that it’s efficient (think in terms of power-to-weight ratio) and it’s also very stable and holds its power well over time.

There are several different grades of Alnico, and the different grades are based on their metallurgical makeup. The most popular for guitar pickups are Alnico 2, 3, and 5; oftentimes referred to as II, III and V. Generally speaking the grades are not in order of “goodness” and the numbers simply denote a particular material composition. Besides what magnet grade is being used, the pickup maker can also vary the amount of magnetic charge (Gauss) the magnet has. Magnets bought in bulk are usually shipped un-charged, and the pickup maker energizes the magnet as part of the build process.

There has been a lot written on the qualities of the various Alnico grades, and the how a magnet material affects the sound of a pickup. So while I’m not blazing any new trails, here are my general opinions on the impact of Alnico grades, gained from my own personal experience and experimentation.

Disclaimer: There are so many other factors in making a pickup – wire gauge, winding tension, winding pattern, potting – that attributing the tonal characteristics solely to magnet material is somewhat folly. Also, some magnet grades are closely tied to pickup style, so you’re unlikely to see a high output metal pickup using Alnico 2 material.

Alnico 2 – Alnico 2 is used most often as a bar magnet material in humbucking pickups. This was the grade used in the early “PAF” pickups, and as a result is commonly employed in vintage-flavored designs. Examples of pickups using Alnico 2 material are the Seymour Duncan Seth Lover, Alnico II Pro, and the Arcane ’57 Experience. Pickups using Alnico 2 material tend to have a slightly soft attack, generally warm tonal characteristics and a slightly loose, bouncy feel. Wound strings have a somewhat woody tone and for some may lack enough definition. While pickups of this sort are generally not wound for high output, when pushed they develop a nice singing quality and make a pretty nice pickup for leads. Players who like to work their amps hard versus using pedals will dig Alnico 2.

Alnico 3 – Alnico 3 magnet material is used in both Gibson humbucker type designs and Fender Telecaster style pickups. Common in early Telecaster bridge pickups, Alnico 3 has good attack qualities, and a clear high end that some would describe as “grainy” and complex. In humbucker pickups, they create a nice balance of warmth, bite and clarity. This is the material used in the Arcane Triple Clone, which is modeled after the 1960 Gibson PAF. Tighter sounding than Alnico 2 pickups, lead tones are crunchy and pleasantly tight, and don’t get overly mushy in the neck position. A nice pick for both rich complex cleans and medium gain rock.

Alnico 4 – Not as common as the other more traditional materials, Alnico 4 is used by few pickup winders such as David Allen, Bare Knuckles, and Mojotone. The opinion is that Alnico 4 combines the warm feel of  Alnico 2 but with better attack and note definition. We really like the tone and pick response of the David Allen P-51 humbucker, which is an Alnico 4 pickup.

Alnico 5 – Likely the most popular magnet material, Alnico 5 shows up in both humbucking and single coils designs; Strats, Teles, and P-90’s. Alnico 5 pickups are characterized by strong output, clear tone, and punchy attack. This all sounds pretty good, and just about every conventionally constructed Stratocaster pickup uses Alnico 5. Some of most popular humbuckers use Alnico 5 including many Seymour Duncan models including the SH-1, JB,  and just about every Rio Grande pickup. Compared to Alnico 3 they may lack a little sonic complexity, but for those about to rock, Alnico 5 is a very good choice.

The Wrap – As they like to say in commercials, “your results may vary.” Your own experience with your own guitar will be the best teacher. Fortunately, pickups are neither very expensive, or hard to install. So do a little testing of your own and see you what you think. You can always drop me a line at sales@upfrontguitars.com.

 

Checking out the Arcane Special “42” Tele Neck Pickup

A long time ago my brother Gordon had a Telecaster. It was his first really good guitar. It was blond and had a rosewood fingerboard ($270 at the Music Machine in Norwalk CT in 1977 – Gordon).   For Christmas one year I bought him a pickup to replace the stock neck pickup. I wasn’t really up on what was current then gear wise and the aftermarket pickup business was in its infancy. This was the ‘70s and even Seymour Duncan mailed a Xerox copy of something he had typed when you called and asked for a catalogue.

I bought him a Velvet Hammer Strat neck pickup. I was probably told by the shop that sold it to me that it would fit with a little work. Of course it did and I’m sure that by Christmas day afternoon were were hacking away to make it fit. While memory isn’t always spot-on, I do remember how good it sounded.

It had that glassy clear liquid Fender sound. We had no Black or Silverface amps, not even a Fender but the sound, that sound was there. The Tele sure didn’t sound like before we installed the Velvet Hammer. Years later I had a Strat and I also installed a Velvet Hammer into the neck position of that.   That sound has stuck with me.   I love a good neck pickup more than any other position on a Strat or a Tele.

The Rio Tallboy has a taller bobbin and uses longer magnets.
The Rio Tallboy has a taller bobbin and uses longer magnets.

Travel ahead 30+ years and now I have a Tele I built up from parts.   I used UpfrontGuitars to source the Emerson pots/caps, the Rio Grande Vintage Tall pickup set and a few other items.

At first figured I’d be swapping pickups after I got the guitar sorted but in fact the Rio Grande’s are very, very good and have held steady for nearly two years now.   I don’t know why I should have been surprised how good they are. They aren’t a “big name” brand and unknown to me at the time.   The bridge is nice and thick with no Cowboy twang that dominates the tone. I can make it bright but I can also make it grind.   Through my 5E3 clone I can get a great clang and clear tone with that great Tweed grizzle on top.

I also like the neck pickup very much. Not a muddy Tele tone as I’ve found on some Fender Tele’s. It has a good true Fender tone.   But I had to change it.   Why?   Because Gordon told me about this Arcane “42” Tele neck pickup that brought that clear glassy Strat feel to a Tele. So I had to try it right?

Well I’m pretty sure this pickup will stay in my “Swan-o-caster”.   Wow. The note separation even within that Tweed gritty envelope is superb. All those adjectives, piano like on the wound strings, clarity, brilliance etc., apply here.   This is classic Fender Strat tone. David Gilmour comes to mind; Mark Knofler and John Mayer to name a few. With chords or single notes there is that honest true Strat sound, the Fender sound.

Where the Rio would get a little blocked up when turned full up the “42” doesn’t. The “42” stays more articulate. Either pickup sounds fantastic turned down as honestly most pickups do.   The “42” can get a me a great scooped almost cocked wah tone when I dial the guitar tone done to maybe 7 and then play up around the 12-16th frets. There is also a kind of Robin Trower sound played this way. The solo from the Stones “Can’t You Hear me Knockin” comes to mind. Just all those iconic Strat tones leaping from my Tele has me very pleased.   I got just the sound I wanted while jamming along in my head to “Like a Rolling Stone” as in Hendrixs’ version from Monterey Pop.   Even without any Blackface kind of amp I can get that “clang”, the percussive strike of a Strat.

The ‘42” gets its tone from being a 5.75k wind vs. the 7.17k wind of the Rio. The Rio has longer magnets that protrude beyond the baseplate. So really once again it shows that outright turns of wire “X” and magnet strength and length make a real world difference. That 5.75k wind of the “42” is pretty low these days. Fine by me. I’d rather hear a pickup amplify the sound of a guitar than just sound like pickup.

So there you go, just another view of one piece of gear vs. another. I’m pretty sure I’ll try an Arcane in the bridge at some point. Toss up between the ’50 and the ’51 Experience.   Stay tuned.

– Neil Swanson

Selecting Guitar Pickups – Science or Art?

Without a doubt, if you want to change the sound of your guitar the biggest single difference you can make is to change the pickups. Anything else: Bridge, saddle materials, pots, caps or tuners are refinements and tweaks that may or may not have a noticeable effect. But changing a pickup can have a mild to radical effect on the sound of your guitar. So how do you select a pickup with any level of certainty? After all it is a “blind” purchase, and aside from a demo guitar or sound clips there really is not an effective way to audition a new pickup.

Like music itself, making pickups is a blend of science and art. Furthermore, describing how a pickup sounds practically has it’s own vocabulary. You’ll hear words like “cluck”, “chime”, “hot” and “glassy” among other words to describe how pickups sound. To some degree you just have to immerse yourself into the world of pickups, read a lot of descriptions of various pickups, listen to sound clips or demo videos where available, and  learn to relate what they are saying to what you are hearing. Like wine buffs, “pickup geeks” have their own language. But at the risk of generalizing, there a some basic categories and classifications that most people can agree on.

Conventional Pickups – By this I mean pickups that follow that follow the classic construction and material techniques set forth by industry pioneers at Fender, Gibson, Rickenbacker, etc. Within the world of conventional pickup designs there are arguably three typical configurations:

Fender® Style Single Coil – Essentially thousands of turns of fine gauge magnet wire wrapped around a bobbin with six individual magnet pole pieces. Some erroneously call it an electromagnet, but a pickup is actually an inductor. The vibrating strings disturb the pickup’s magnetic field and induce a current (signal) in the coil which goes to your amp and the rest is history, and a lot of it. This type of design is famous for clarity, good string definition, high end response, and the propensity to pick up stray electrical noise (hum).

The P-90 Style – This design was introduced by Gibson® in 1946, although there were earlier similar designs. The p-90 is a single coil pickup but the (6) pole pieces are threaded steel screws that pass through the coil with a bar magnet located beneath the coil. The overall coil resistance of the P-90 is generally higher than the Fender single coil, and the magnetic field is different. P-90’s tend to be higher in output with a thicker midrange and less clarity at the high end. The P-90 has gone in and out of vogue over the years, but a good P-90 is a joy, especially in the bridge.  Some Fender-type pickups are really “imposters’ and actually follow the P-90 design. For example, many Fender MIM (Made in Mexico) and some Godin Stratocaster-type pickups are actually steel pole pieces with bar magnets beneath the coil. Usually this is a cost-driven decision although they can sound pretty good. P-90’s share the same noise issues as the Fender pickup, sometimes worse.

Hum Canceling (Humbucker) – Invented in 1955 by Seth Lover, who worked at Gibson. The humbucker pickup uses two single coils wired in series and out of phase. Using what is call common mode rejection, the two coils cancel most of the hum. Humbuckers are characterized by a fuller, thicker sound than a single coil, a strong midrange, but also with less high frequency response and upper end clarity. Nearly all Humbuckers use a construction similar to the P-90, with a bar magnet underneath the coil, and threaded screws or steel pole pieces that pass through the coil. There are many variation of the humbucking design: The coils can be in line which is the most typical configuration, facing each other with the pole pieces in between the two coils, or stacked which gives the appearance of a single coil pickup. The Precision Bass and G&L Z-Coil pickup have two coils side-by-side with each coil covering just half the strings. This provides hum canceling benefits while retaining a more single coil tone.

Variations on a Theme – For many, the best pickups were invented nearly sixty years ago, and that’s that. But there is always somebody our there trying to improve the breed and there are some notable examples. Lace Sensor has been producing uniquely designed hum cancelling pickups for many years, aimed primarily at Stratocaster players. Their Lace Alumitone pickup is a real departure — in both looks and sound — from a normal pickup and combines both noiseless operation and a very broad frequency range. The G&L MFD (magnetic field design) pickup in terms of construction is really very much like a P-90. However, the MFD has a fairly low coil resistance and larger magnetic field. The result is high signal output and a broad, flat frequency response. The term “hi-fi” is often associated with MFD pickups because they don’t over accentuate any particular frequency. Guitar players in general are conservative bunch, and many shy away from anything seen as deviating from past classics. But the Lace, MFD, and noiseless pickup designs from Lindy Fralin and others offer some real alternatives to the classic limitations of pickup design.

Can you buy a pickup on “specs”?

There are a several ways to characterize a pickup by measuring certain properties. However some of those are hard for the typical consumer to relate to. The most common measurement of a pickup is resistance (usually in thousands of ohms, or KΩ). Resistance is essentially the DC resistance of the pickup coil. Resistance can generally describe the approximate output of a pickup, and typically higher resistance pickups are hotter (louder) pickups. Resistance can be increased by either more windings, or changing the gauge of the magnet wire, or a combination of both. While we are talking generalities, higher resistance pickups will often have more midrange and less high frequency response, and a “fatter” sound.  As mentioned earlier, pickups are not actually resistors but inductors, and inductors are measured in Henries. Lace actually lists the inductance of their pickups, but I’m not sure that is of much value to the average guitarist.

Magnet power can be measured too, but measuring the magnetic field of permanent magnets is quite complex, and beyond the realm of most of us. Different magnet materials such as generic ceramic magnets and the revered ALNICO (Aluminum, Nickel, Cobalt) have differing magnetic properties, retain their magnetic properties differently over time. Some pickup makers will actually “age” their pickups, essentially demagnetizing them (degaussing) to replicate how an old pickup might sound now. So magnet efficiency and material (Ceramic, ALNICO 2, ALNICO 5, Samarium Cobalt) do make a difference in pickup sound and efficiency, but most people rely on subjective descriptions rather than hard measurements. You can always subjectively measure the magnetic properties of a pickup by taking a small screwdriver and seeing how strongly it is attracted to a pickup pole piece. Again talking in generalities, stronger magnets will induce a greater signal in the coil and produce more output.

Many months ago I was swapping out some pickups in my son’s “Highway 1” Telecaster. It’s a nice guitar, but I’m a Rio Grande dealer and wanted to road test some of their product. The stock Telecaster bridge pickup sounded pretty good but was maybe a little thin. I measured the resistance, and it was a whopping 11K ohms. But the magnets had almost no “pull” on the screwdriver. The resistance of the Rio Grande Halfbreed Tele bridge pickup was a more normal 8K resistance, but the ANILCO magnets had a much stronger subjective pull. The result? Both pickups had similar volume output but sounded different. If we looked at the Highway 1 pickup solely in terms of resistance we would think, “wow that’s going to be really hot”. But not knowing the magnetic field of the pickup showed how resistance is a incomplete measurement by itself. It’s reasonably safe to say that selecting a pickup by reading the manufacturer’s technical data is not going to accurately describe the tonal qualities of the pickup.

So How Do I Select A Pickup?

Without being a wise guy: It’s a journey. As mentioned earlier it’s important to read pickup reviews, gear pages, and manufacturer’s websites, and experiment a little by trying out some pickups. If you can handle a screwdriver and a soldering iron, the world is your oyster. If you try a pickup and don’t like it very much, chances are somebody on eBay will. Keep in mind that pickups will sound different in different guitars, so it’s most effective to experiment with your own guitar.

There are many other factors that affect the sound of a pickup than just resistance and magnetic force: Winding pattern, winding tension, potting (usually a wax material applied to the coil to help prevent feedback), bobbin size and height, etc. It’s impossible for the consumer to predict the effects of all these potential design considerations. It’s for the manufacturer to do the proper R&D to determine what variables give them the sound they want within their cost targets.

Do not assume that only boutique manufacturers can produce good pickups. There are many small winders devoting tremendous energy into recreating the vintage vibe of early pickups, but reverse engineering a 1957 PAF may not be the solution to everybody’s needs. Larger companies can do a lot of R&D and invest money into building very consistent processes. Just because “Company A” sells thousands of “shred-o-matic” pickups at the local big box does not mean they can’t satisfy the needs of a blues traditionalist. I work with a guitar builder that often uses boutique pickups in his guitars but also really likes the DiMarzio Area 51 pickups and encourages their use. I sell Rio Grande pickups, and they don’t get hung up on creating vintage reproductions. Their focus is to build great sounding pickups for a variety of applications. I wish they would write better descriptions on their website, but I’m OK taking the time to write my own. I also really like the G&L MFD pickups (not all of them equally though) and their large MFD is probably my favorite pickup to play. But it’s not a vintage anything, and especially not a traditional Fender single coil. Leo Fender developed the MFD because he was trying to develop something that was even better. He was looking forward, not backwards.

So while there is science in pickup building, the selection of a pickup is almost totally subjective, and purchasing pickups just based on specifications or snob appeal will not lead to guaranteed satisfaction. Read, listen, test, experiment, and develop your own understanding of what works for you. And don’t forget to practice in between pickup swaps!