What Is a Soundhole Pickup? A Comprehensive Guide for Acoustic Guitarists

A soundhole pickup is a removable or permanent electromagnetic or microphone device that fits into the soundhole of an acoustic guitar, converting string vibrations into an electrical signal for amplification or recording. It offers a non-invasive way to electrify an acoustic guitar without permanent modification, making it popular for live performances, including charity concerts and benefit events.

Etymology / Origin

The term “soundhole pickup” derives from its placement: it sits directly in or over the soundhole of an acoustic guitar. The concept emerged in the early 20th century as guitarists sought to amplify their instruments for larger audiences. Early experiments involved telephone microphones and rudimentary magnetic coils. The first commercially successful soundhole pickups appeared in the 1930s, with brands like DeArmond introducing models that clamped onto the soundhole. These early designs paved the way for modern removable magnetic and microphone-based systems, which became staples for acoustic musicians in the folk revival of the 1960s and later in benefit concerts like Live Aid, where clear, feedback-resistant amplification was essential.

How It Works

A soundhole pickup operates on electromagnetic induction (magnetic type) or acoustic transduction (microphone type). In a magnetic soundhole pickup, a magnet wrapped with a coil of wire creates a magnetic field. When the steel strings vibrate within this field, they disturb the magnetic flux, inducing a small alternating current in the coil. This signal is then sent to an amplifier or PA system. Microphone-based soundhole pickups use a small condenser or electret capsule to capture sound pressure changes inside the guitar body, converting them into an electrical signal. Some models combine both technologies for a more natural tone. The pickup typically mounts via clamps or brackets that attach to the edges of the soundhole, requiring no drilling or permanent alteration. The signal often passes through a preamp (built-in or external) to boost and shape the tone before reaching the amplifier.

Notation & Diagrams

While soundhole pickups do not involve musical notation, a typical installation diagram includes:

• Soundhole pickup body – the main unit housing magnets or microphone.
• Mounting clamps – adjustable brackets that secure the pickup to the soundhole edges.
• Output jack – usually a 1/4″ jack that hangs from the soundhole or is integrated into an endpin jack.
• Volume/tone controls – often located on the pickup itself or on a small preamp module.

For a visual reference, imagine a small rectangular or oval device spanning the soundhole, with two metal arms that grip the top of the guitar under the strings.

Step-by-Step Installation

1. Loosen the strings – detune the guitar slightly to create slack, but do not remove them completely.
2. Position the pickup – slide the pickup into the soundhole, aligning it so the pole pieces sit under the strings.
3. Secure the clamps – tighten the mounting screws or clamps until the pickup is firmly attached to the soundhole edge. Avoid over-tightening to prevent damage to the guitar’s finish.
4. Route the cable – if the pickup has an external cable, drape it out of the soundhole or through the endpin hole (if using an endpin jack).
5. Connect to an amplifier or DI box – plug in the 1/4″ jack and test the signal.
6. Adjust the height – if the pickup has adjustable pole pieces, set them to match the string radius for balanced output.
7. Tune up and test – bring the strings back to pitch and play through an amp to check for even response and feedback.

Common Variations

• Magnetic Soundhole Pickups – the most common type; works only with steel strings. Examples: DiMarzio DP139, Seymour Duncan Woody.
• Microphone Soundhole Pickups – use a small condenser mic inside the body; captures a more natural acoustic tone but is prone to feedback. Example: L.R. Baggs M80 (combines mic and magnetic).
• Dual-Source Systems – blend a magnetic pickup with an internal microphone or piezo for enhanced tonal flexibility. Example: Fishman Rare Earth Blend.
• Active vs. Passive – active pickups include a built-in preamp requiring a battery; passive pickups do not. Active systems offer higher output and tone shaping.
• Removable vs. Permanent – most soundhole pickups are removable, but some can be hardwired with an endpin jack for a cleaner look.

Common Mistakes

• Using magnetic pickups with nylon strings – magnetic pickups require ferrous strings; nylon strings will produce no signal.
• Over-tightening clamps – can crack the soundhole edge or damage the finish.
• Ignoring string balance – if pole pieces are not adjusted, some strings may be louder than others.
• Neglecting feedback control – microphone-based pickups can howl at high volumes; use a soundhole cover or notch filter.
• Poor cable management – a dangling cable can cause noise or get caught; use an endpin jack or secure the cable.
• Forgetting the battery – active pickups will not work without a fresh battery; always carry a spare.

Notable Examples in Songs

These songs were performed at charity concerts using acoustic guitars amplified with soundhole pickups, showcasing their reliability in high-stakes live settings:

• “Here Comes the Sun” – Paul Simon (Live at Central Park)
• “The Sound of Silence” – Simon & Garfunkel (Concert for Central Park)
• “Fast Car” – Tracy Chapman (Wembley Stadium, Nelson Mandela 70th Birthday Tribute)
• “Imagine” – John Lennon (various tribute concerts)
• “Hallelujah” – Jeff Buckley (Live at Sin-é, though not a charity event, often used in benefit covers)
• “Wish You Were Here” – Pink Floyd (Live 8 reunion)