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Active vs Passive Guitar Pickups
What Is A Guitar Pickup
Pickups to guitarists are what microphones are to singers.
The pickup technology is called a transducer that converts one type of energy to another.
The Pickup/Transducer captures and converts the vibrations of your guitar’s strings into an electrical signal; these converted signals can be sent through to your pedals and amplifiers from your guitar and out through speakers or transferred directly into recording software. (More on this later)
The result of this electronic sonic representation creates an amplified sound more significant than its origin.
Unlike an acoustic, the electric guitar would not make much noise and stay relatively silent without this design.
History Of The Pickup
The first guitar appearance with a “pickup” was attempted unsuccessfully in 1928.
But in 1931/32, a Rickenbacker Electro A-22 or “Frying Pan” lap steel guitar, called because of its circular body and long neck resemblance to the kitchen accessory, was created by George Beauchamp and Adolf Rickenbacker.
Made from cast aluminum, it sported a “Pickup” that incorporated a pair of horseshoe magnets that arched over the strings and were awarded a patent in 1937. (See image)
Pickup Types & Categories
There are multiple styles and guitar pickup designs, but they generally come in 2 Types & Categories...
- Single &
- Double coil or Humbucker
Called Humbucker because of the way the coils are connected in reverse polarity, cancelling out the hum and other noise you usually find in single coils. (See image)
The single coil type is slimmer shaped, and the humbucker type is a broader design. It is positioned on your instrument’s body between the Neck and Bridge directly below where you pick or strum the strings (see image) and can also have covers to increase their cosmetic appeal.
- Passive &
Are Humbucker Pickups Active Or Passive
Humbuckers are both, but with some differences.
In Passive Humbucker models, the 2 coils are connected; with Active pickup models, the coils are not; also, a component in the preamp cancels the noise and works to boost the signal.
So cosmetically, they are similar in size and appearance, but design-wise, they are very different.
Depending on the type of sound wanted, pickups can be placed in many different configurations on a guitar, usually found with passive models.
A configuration combines pickups using single coils “S” and or Humbuckers “H,” alone or combined.
A wide range of sonic tones can be attained with varied pickups and switching options.
The Anatomy Of A Passive Pickup
Passive pickups are the most common and popular pickup type on electric guitars. It comprises of a combination of a bobbin, magnets (x6) & a coil of copper wire. (See image)
How It Works
String vibrations disrupt the pickups magnetic field read as a current, causing the coil to generate an electrical signal that then travels through your cable to your peddles and amplification, with no need for an external power source, and considered to be the purest form of amplification. (See image)
Output & Tone
Even though the concept is simple electronically (bobbin, magnets & wire,) how the pickups are made create different outputs and tones and becomes a balancing act.
Some processes to consider…
- Magnet type and strength
- The type of wire and insulation used
- How the winding is done
- The number of wire turns on the bobbin made when the pickup is wrapped – Generally, more winding increases output but loses brightness, with fewer windings decreasing output but improving clearer tones.
Despite the countless output & tonal options in the passive pickup designs, it is essential to note that guitar tone controls only act as low passive filters and can only roll off or reduce high-end frequencies, for there is no preamp to boost the signal.
Passive pickups give you an output signal with high impedance (high voltage, low current.)
This signal accounts for high-frequency loss and doesn’t allow for long cable runs, also causing the tone to change when the guitar’s volume control is turned down; the quality of your amp is also essential in getting the most out of your passive pickup.
The Anatomy Of An Active Pickup
Active pickups (first developed in 1976 and widely used in the early 80s to the present) operate and are made of similar materials to a very low-output passive pickup but with 3 main differences…
- Power requirements
- Less winding
- Fewer coils
Active refers to a pickup with a higher output with more consistent, strong, focused, clear and tight tones.
It responds aggressively to high levels of gain and overdrive settings but with less residual hum or noise and has a more modern sound than the passive counterpart offering some great sonic options. (See image)
How It Works
Fewer Windings, Number Of Coils & Quiet
Like a traditional passive pickup, it still magnetizes the guitar strings and picks up the vibration through the magnetic pull, creating an electrical signal induced in the coil.
But because they do not need as strong of an electrical current to boost the signal, they are wound less and use a smaller number of coils, supplemented and amplified by the preamp and various filters onboard the guitar, operating with the power of a battery.
Active pickups are more resistant to hum, less noisy, and less sensitive to external sounds than passives and anything but weak.
Because of the built-in preamp, a low-impedance (low-voltage, high-current) signal makes for an aggressive or “hotter” pickup.
“Hotter” refers to a signal output being stronger.
This signal offers better transfer from the guitar to the amplifier. Unlike high impedance, it handles longer cables, and the tone does not change when you turn down your guitar’s volume control.
With a less magnetic pull, the strings can ring out longer, resulting in the potential for more sustain.
With active pickups, the versatility in shaping your sound is more readily available. The way they interact with your guitar’s electronics, active pickups offer more control over the tone and output.
Can You Put Active Pickups In A Passive Guitar?
Active and passive pickups are very different in design.
The two types of pickups can cost similarly, but if you want to change from one technology to another, modifications are required and can lead to a significant expense.
The cost is in the complexity of the design and parts adding to the price, i.e. adding a battery compartment. (See image)
This is also how you will know if pickups are Passive or Active.
If your guitar requires a battery, chances are that it has active pickups.
If it doesn’t or will function without a battery, then the pickups would be considered passive.
Batteries Batteries Everywhere
It’s the crosses we must bear as guitarists, dependence on batteries for peddles, accessories and even active pickups.
If your battery runs out of power or is almost on its last energy leg, like your peddle, it will either quit working or leave you with no sound or funny results.
As guitar building and technology evolve, the materials and techniques change and improve, building on the pickup concepts to achieve new levels.
Along with artists seeking more advancements in their signature model instruments like Marty Friedman and his Jackson MF-1.
The Signature MF-1
Marty Friedman wanted a new brand of passive EMG pickups where he would not need to concern himself with batteries but still get the dynamic EMG Active Response Punch and Clarity he was used to playing with…
And they delivered…
“When I heard this pickup, I knew it was ‘the one because it made me want to keep playing and never stop. This is my sound — I’m glad EMG took the time to get it right.”
How Do You Know Which Pickup To Have?
Both types are tools that provide players with variety and give options for what is better for the situation.
Did You Like This Article?
Check out the post on a Guitar string dampener.
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As always, stay the course and keep playing.
Feature image courtesy of Céline Martin from Pixabay
Road signs Image by Gerd Altmann from Pixabay
Image of Steve Morse Playing live by Carlton morris from Pixabay
Starting A Journey At 7 Years Of Age, The Love For The Guitar Only Became Stronger Going Into My Teens. This Leading To An Exciting Time Of Teaching, Performing, And Recording. Join Me Now As We Can Bring The Love Of This Instrument To Other Musicians Globally.