Acoustic Guitar Amplification Guide: Pickups, Mics, and DI Boxes

You’ve got a great acoustic guitar. You can play it beautifully in your living room. But now you’re playing a coffee shop, a small venue, or backing up a singer. Suddenly you realize the acoustic guitar’s natural volume isn’t enough. You need amplification.

The amplification question is more nuanced than plugging an electric guitar into an amp. An acoustic guitar’s tone comes from the body’s natural resonance. Run it through the wrong amplification method and you lose that character. Choose the right method and you enhance it.

Let’s explore the main amplification options available to acoustic players and help you choose what works for your situation.

Undersaddle Pickups: The Standard Choice

An undersaddle pickup lives under the saddle of your guitar - the piece of bone or plastic that holds the strings at the bridge. When the strings vibrate, they transfer energy down through the saddle to the pickup below, which converts that vibration to an electrical signal.

How it works: The pickup is a thin transducer strip that sits directly under the saddle. As strings vibrate, they compress the saddle onto the pickup, creating electrical signals proportional to the string vibration.

Sound character: Undersaddle pickups capture the energy transmission through the saddle. They tend to sound clean and direct. The tone is fairly transparent - you get what you’re playing, though some presence in the lower midrange is typical.

Pros:

Very feedback-resistant (the pickup is isolated from the soundhole where feedback happens)
Clean, articulate sound
No visible equipment on the guitar
Works well for strumming and fingerstyle
Affordable ($50-200 for decent options)
Easy to install on many guitars
Consistent volume regardless of position relative to the amp

Cons:

Can sound thin or piezo-like if not blended well
Doesn’t capture the guitar’s natural resonance as naturally as a microphone
Requires playing technique changes on some systems (harder strings feel louder)
Battery-dependent if your system needs power
Can pick up handling noise and finger scrapes more than you’d like

Best for: Live performance where feedback is a concern, strumming-focused styles, situations where you need consistent amplification without being sensitive to mic placement.

Popular options: Fishman Matrix, Seymour Duncan Woody, LR Baggs Element, Piezo systems built into many modern acoustics.

Soundhole Pickups: The Rosette Mounted Option

A soundhole pickup mounts on the inside of the guitar at the soundhole - the circular opening in the guitar’s body. It’s typically a magnetic or piezo pickup that sits just below the soundhole.

How it works: Soundhole pickups react to the vibration of the guitar’s top, especially the area around the soundhole. They capture the energy that’s radiating out of the guitar.

Sound character: Soundhole pickups tend to have more of the natural guitar character than undersaddle pickups. They capture some of the resonance and body of the acoustic tone. The sound is warmer and rounder.

Pros:

More natural acoustic character than undersaddle
No modification to the guitar’s bridge or saddle
Good for fingerstyle players who want clarity
Works with most acoustic guitars without special installation
Reasonably feedback-resistant
Often affordable ($40-150)

Cons:

More feedback-prone than undersaddle (the soundhole is the feedback danger zone)
Can vary in quality depending on placement
Handles position changes - moving closer to or away from the amp changes tone and volume
Less consistent than undersaddle for dynamic playing
Visible on the guitar (though minimally)

Best for: Home recording, intimate venues where feedback isn’t a major concern, fingerstyle players who want a warm tone, as a backup system.

Popular options: Dean Markley Pickup, Shadow Soundhole pickups, Seymour Duncan Mag Micros.

Contact Pickups: The Subtle Choice

Contact pickups (also called transducer pickups) clamp or glue to the guitar’s body - typically on the inside of the lower bout, away from the soundhole. They vibrate with the guitar’s body itself.

How it works: The contact pickup literally contacts the wood of the guitar’s body. As the entire guitar vibrates, the pickup picks up those vibrations directly from the wood, converting them to electrical signals.

Sound character: Contact pickups capture the overall vibration of the guitar’s body. The tone is very natural and woody - closer to what a microphone would capture than any other pickup type.

Pros:

Most natural acoustic tone available from a pickup system
Very feedback-resistant (placed away from the soundhole)
Excellent for fingerstyle with rich body resonance
Works well on guitars without bridges designed for undersaddle pickups
No modification to the saddle needed
Consistent response across playing dynamics

Cons:

Can pick up body contact noise (taps, bumps, arm movement)
Installation requires accessing the inside of the guitar
Sound can be boomy if not properly EQ’d
More expensive than other pickup types ($150-300+)
Replacement or adjustment is not quick
Can require professional installation

Best for: Studio recording, fingerstyle performers who want maximum acoustic character, players who need a very natural tone.

Popular options: LR Baggs M1 Acoustic, Shadow SH 125 series, Fishman Rare Earth.

Microphones: The Audiophile Approach

A microphone pointed at the guitar captures the acoustic sound waves coming from the instrument. This is what professional studios use for acoustic recording and what some live performers use for maximum authenticity.

How it works: A microphone converts acoustic sound waves into electrical signals. Condenser microphones (most common for acoustic guitar) are extremely sensitive and capture fine detail. You position the mic at an angle to the guitar - typically pointing at the 12th fret area.

Sound character: A microphone captures the full acoustic character - every nuance of the guitar’s tone, including body resonance, string vibration, and room reflections. The sound is rich, full, and completely natural. This is what your acoustic guitar actually sounds like to someone across the room.

Pros:

Most natural sound available
Captures the full character of your guitar
No modification to the instrument
Works with any acoustic guitar
Excellent for tone
Studio-quality results
Multiple mic options available for different tones

Cons:

Very feedback-prone (mics pick up amplified sound and re-amplify it)
Sensitive to position - moving slightly changes the tone significantly
Requires proper mic technique and discipline
Needs a good preamp and mixer to sound professional
Environmental noise is picked up (wind, ambient sound, handling)
More expensive when you factor in quality mics and equipment ($200+)
Requires technical knowledge to set up properly

Best for: Studio recording, intimate venues with good mic technique, professional performers, situations where maximum tone is the priority over practical ease.

Popular options: Shure SM81, Rode NT1, Audio-Technica AT4022, AKG C1000.

DI Boxes: The Integration Tool

A DI (direct injection) box isn’t amplification itself - it’s an interface that takes a signal from your guitar pickup and converts it for compatibility with mixing boards and PA systems. Many DI boxes also provide tone shaping capabilities.

How it works: Your guitar plugs into the DI box. The box converts the high-impedance signal from a guitar into a low-impedance signal compatible with XLR cables and mixing boards. Many DI boxes also include tone controls (EQ), phase switches, and impedance matching.

Sound character: A DI box itself doesn’t create sound - it transfers it. However, good DI boxes can shape the tone through onboard EQ and impedance matching that makes the pickup sound better.

Pros:

Makes your pickup signal compatible with professional PA systems
Adds flexibility with onboard tone controls
Creates a barrier between your guitar and the mixing board
Professional and clean setup
Works with any pickup system
Protects your guitar from ground loops and noise
Passive options are affordable ($30-100)

Cons:

Another piece of equipment to own and carry
Requires understanding of impedance and signal flow
Cheap DI boxes don’t add any tone help
Another potential point of failure or noise
Requires XLR cables and a mixing board to use properly

Best for: Live performance at venues with PA systems, any amplified acoustic setup where you want to integrate with professional sound systems, performances where you need tone control at the board.

Popular options: Behringer DI100, Radial ProDI, Whirlwind Director, Countryman Type 85.

Combination Approaches: Blended Systems

Many professional acoustic players use two amplification methods simultaneously:

Pickup plus microphone: Use an undersaddle pickup as the primary signal (feedback-resistant) and blend a microphone in as a secondary signal for natural character. This gives you the safety of a pickup with the tone of a microphone. Requires a good sound engineer to blend the signals.

Dual pickups: Some players use both undersaddle and soundhole pickups, blended together. This provides a more complete picture of the guitar’s vibration and response.

Pickup through a DI plus monitor: Use your pickup through a DI box to the main PA, but also send a separate signal to a monitor speaker so you hear yourself naturally.

These approaches require good sound equipment and proper mixing, but they’re what professional touring musicians use.

Preventing Feedback

Feedback happens when amplified sound from your amp is picked up by your pickup and re-amplified, creating a high-pitched squeal. Here’s how to prevent it:

Use feedback-resistant pickups: Undersaddle pickups are most feedback-resistant. Soundhole pickups are most feedback-prone.

Mic placement: If using a microphone, position it so it doesn’t point at your amp or monitor speaker. Angle it toward the guitar, not the sound system.

Speaker placement: Don’t put your amp or monitor speaker directly in front of your microphone. Keep them to the side or behind.

Gain structure: Set your pickup gain so you don’t need excessive amplifier volume. Higher volume increases feedback risk.

Frequency awareness: Feedback typically happens around certain frequencies. A graphic EQ can help you identify and reduce the feedback frequency without affecting tone.

Play with discipline: Avoid pointing your guitar at your amp. Keep your position consistent relative to your microphone. Don’t play too dynamically - sudden loud strums can trigger feedback.

Try This in Guitar Wiz

Use Guitar Wiz’s chord progressions and song maker to build confidence in your playing before amplifying. Getting comfortable with your playing dynamics helps you manage amplification better. The metronome helps you develop consistent, controlled playing that’s less prone to feedback. Practice different strumming patterns with focus on dynamics - this discipline translates to better control when amplified. Study different voicings in the chord library to understand how different inversions and voicing choices will sound when amplified. Experiment with which voicings sound fullest and which sound thinnest, then carry that understanding to your amplified performance.

FAQ - People Also Ask

Which amplification method sounds most like my acoustic guitar in a room? A microphone is closest to what your guitar actually sounds like. However, for live performance, a quality pickup blended with good room acoustics is often nearly as good and much more practical.

Can I use an electric guitar amplifier for an acoustic pickup? Technically yes, but not ideally. Electric amp speakers are designed for electric guitar tone. An acoustic amp (or a keyboard amp, which has flatter frequency response) sounds much better with acoustic pickups.

What if my acoustic guitar doesn’t have a pickup installed? You have a few options: install an undersaddle pickup (requires removing the bridge), use a soundhole pickup (no installation needed), use a contact pickup (requires accessing the inside), or use a microphone. A soundhole pickup or microphone are the easiest options for a non-modified guitar.

How much does amplifying an acoustic guitar cost? A decent undersaddle pickup system costs $50-150. A complete system with pickup, cable, and preamp might run $150-300. A microphone-based system depends on the mic quality but starts around $150-200. Adding a DI box adds $50-150. Budget $200-400 for a good complete system.

Do I need an amplifier or does the pickup plug straight into a PA system? Both are viable. At a venue with a PA system and sound engineer, your pickup goes through a DI box to the mixing board. For smaller venues or busking, you’d use a small acoustic amplifier. Some pickups have built-in preamps that provide enough output for a small amp.

Which pickup should a beginner choose? An undersaddle pickup is the standard choice for beginners and live performers. They’re feedback-resistant and reliable. If your guitar doesn’t have one, a soundhole pickup is an easy add-on that costs less and requires no modification.

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