LeafAudio - Geophone L

Use this adaptor for connecting symmetrical or asymmetrical sources with XLR connector to the input of LeafAudio's Field Amp.As the Field Amp does not feature symmetrical input or outputs, this adaptor is actually asymmetrical (XLR pins 1 and 3 bridged according to the standards).Features:• Asymmetrical XLR female to 3,5mm (1/8") mono jack• HiCon XLR connector female• Amphenol 3,5mm (1/8") mono jack• Sommer Cable Onyx Tynee cable material• Length: ~35cm tip to tip

This add-on package is specifically for Geophone L. It will NOT fit for Geophone S!It includes:• Bow holder• Special woodscrew• Adapter from M4 to 1/4" universal camera mountThe bow holder allows you to not only attach the Geophone 90° or parallel to surfaces but also in in a variable angle. It might optimize the sound performance, as due to the nature of the construction of a Geophone, it will deliver slightly different results depending on the angle. The holder features an M4 threading like the Geophone itself, means you can combine it with the magnet that comes with the Geophone. Please do not use the Geophone as screw-driver for the wood screw!

The Geophone is a omnidirectional seismic sensor that captures low-frequency vibrations. Besides detecting seismic activity, the Geophone can be used to capture extreme low-end for sound design, music production, field recording, foley and game sound.We offer two versions to meet your budget and your needs: Geophone S and Geophone L. Both come in a protective hard case, equipped with a magnet, steel spike, clamp and suction cup.We offer an add-on pack for both versions - it includes a variable clamp that allows the angle to be continuously adjusted to optimize their sound performance, a special woodscrew and an adapter from M4 to 1/4" universal camera mount.Geophone L has an extended frequency range and sensitivity over Geophone S.* Due to the nature of Geophones it might be possible that it picks up electromagnetic fields and interferences in some areas. Please note that the Geophone itself, and also the included magnets might have unwanted effects on credit cards, hard disks, ICDs and other devices that work on the basis of electromagnetism!Features:• Height / width: 70 x 38 mm• Weight: 214 g (Geophone S with cable & XLR)• Weight: 436 g (incl. case and included add-ons)• Case• 2,0 m cable with balanced XLR• Frequency range: 28 Hz - 1000+ Hz• Impedance: 1850 Ohm• Distortion: 0,2 %• Sensitivity: 28 V/m/s

This is the new 2025 contact mic version. Update June 2026: A magnetic ring is now included, as it was a highly requested feature. Our Contact Mic is now magnetic!With a contact microphone, any surface or object becomes a canvas for sonic exploration. Unlike traditional recording methods that capture sound waves traveling through air, contact microphones pick up vibrations directly from materials – allowing you to "listen" to objects, plants, or even soil from the inside out. This unique perspective unlocks a world of intriguing and sometimes abstract sounds, making it an essential tool for experimental recording and sound design.  The 2025 edition of LeafAudio’s popular contact microphone has been completely re-engineered for maximum flexibility and features full electrical shielding for optimal performance.This upgraded model comes in a set with a durable neoprene zip-bag, ensuring safe transport while providing space for all included accessories. Thanks to its universal clamp mechanism and strong rubber bands, it can be mounted on almost any surface. Additionally, the newly developed probe mechanism — created in collaboration with sound designer Robert Dudzic — lets you capture sounds even from inside objects, soil, and more, expanding the creative possibilities even further.Equipped with a high-quality 2m (6.5ft) SC-Onyx Tynee cable by Sommer Cable, the microphone is available in two versions: one with a 3.5mm (1/8") Amphenol connector and another with a 6.3mm (1/4") Hicon connector.  Includes:• Contact microphone• Magnetic ring• Neoprene zip-bag• Universal holder• Probe mechanism• 2 rubber bands• Allen key

Field Amp is LeafAudio's solution for the world of body sound transmission: recording the world with contact microphones. It provides high-gain, noise-free amplification and impedance conversion to ensure the best possible sound quality from your contact mics.After releasing our Microphonic Soundbox, the team of LeafAudio quickly realized they’d hit a sweet spot. Many sound designers praised its clean, noise-free amplification – even if they didn’t need the Soundbox itself. So they created a standalone solution: the Field Amp. If you want the Soundbox amp without the box, the Field Amp is your new best friend. Perfect for studio work, field recording, sound installations and creative sound design of all kinds.Quality amplification & power management circuitry. No noise or beeping can be heard or seen in the spectrum, not even above the hearing range, which would come into focus later during sound manipulation processes. You can record with high sampling rates, transpose the audio by a lot and enjoy your pure sound. Just the clear, pristine audio you want to capture with your contact microphones.Optimised for travelling. 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.Body sound transmission vs. airborne sound. 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.Field Amp is optimised for Hi-Z signals of contact microphones. It also acts as an impedance converter with a powerful output signal. No loss of signal quality when you keep the wiring short between microphones and the input. The output is a strong signal and you don't have to worry about a few meters of cable.We recommend using the shielded contact microphones by LeafAudio. Generally you can try contact mics with our pre-amp, hydrophones, or guitar pickups. We offer separate adapters for both input and output to ensure compatibility with all your devices.Features:• Low-Noise pre-amp for contact microphones• Case included• 9V DC power supply or battery• USB-C to barrel connector adapter cable included• Up to ~50x adjustable gain• 1 mono input• 2 mono outputs (one -12 dB)• All connections 3.5 mm (1/8") mono jack• Input impedance: 3,3M Ohm• Output impedance: 1k Ohm• 12 x 12 x 3.4 cm• 410 g (incl. case & USB-C to barrel cable)• 1/4"-UNC mount on top and bottom for camera tripods etc.