Field Amp

A compact, battery-powered amplifier designed to deliver clean, high-gain amplification for contact microphones.

Amplify Contact Microphones with Precise Detail

The Field Amp is designed to produce no audible noise or spectral artifacts, including ultrasonic components that may surface during post-processing. This makes it ideal for high sample-rate recording and extreme pitch manipulation, delivering clean, pristine audio from contact microphones.

The small unit is fully portable, light, offers many mounting possibilities. A professional case is included, which also can carry your contact mics, batteries and cables.

We’re used to hearing the world the way our ears do – through air. Sound travels through the air before reaching our eardrums or a microphone. But with contact microphones, you change that perspective. Instead of hearing the surface of materials, you hear from within them. This shift opens up a powerful trick for sound design. It reveals a hidden world of textures and tones that are normally out of reach. Give it a try – there’s an entire universe of sound waiting to be discovered.

The Field Amp also acts as an impedance converter, delivering a strong output signal. With short cable runs between the microphones and the input, signal quality remains uncompromised. Thanks to its powerful output stage, you can use several meters of cable on the output without concern.

A LeafAudio Field Amp, a compact black audio amplifier with gold accents and a top-mounted cooling fan, featuring input and output jacks on the front panel, a blue power indicator light, and a central control dial.

The Field Amp is a compact, battery-powered amplifier designed to deliver clean, high-gain amplification for contact microphones. Based on the trusted circuitry of the Microphonic Soundbox, it offers the same low-noise performance in a standalone format. It is ideal for mobile recording setups or sensor-based installations requiring clean, high-impedance amplification.

A small black electronic device with a decorative top, placed on a sandy surface.

„The design of the LeafAudio’s Contact Microphone with attachable probe gives me fast, precise access to my sound sources. Paired with the Field Amp, it adds a whole new sonic dimension to my recordings – capturing both external textures and internal vibrations with incredible clarity. This setup has become my go-to for both indoor and outdoor sessions.“

– Robert Dudzic, Souddesigner

Mechanical Data

Height / width: 12 x 12 x 3.4 cm
Weight: ~192 g
Input impedance: 3,3M Ohm
Output impedance: 1k Ohm
Up to ~50x adjustable gain
1 mono input
2 mono outputs (one -12 dB)
1/4"-UNC mount on top and bottom for camera tripods etc.

Includes

• Geophone
• Travel
Case
USB-C to barrel connector adapter