Leaf Audio Microphonic Soundbox MK2 Experimental Acoustic Sound Design Instrument

Brand: Leaf Audio

Model: Microphonic Soundbox MK2

Type: Electro-Acoustic Contact Microphone Instrument & Field Amp

Features: 2 Internal Contact Mics, Dual Low-Noise Preamps, Integrated Kalimba & Springs

Power Source: 9V Battery Operated (Integrated power management circuit)

Condition: Good / Project (Missing stock metal rods/antennae)

Functional Status: 100% Electronically Functional (Preamps, contact mics, outputs, and onboard materials work perfectly)

Up for sale is a used Leaf Audio Microphonic Soundbox MK2. The Soundbox MK2 is a legendary, cult-favorite sound design tool and electro-acoustic laboratory. It uses two ultra-low-noise internal contact microphones and dual battery-powered preamps (~100x gain) to amplify the tiniest physical vibrations, scratches, and tactile movements into massive, cinematic, and otherworldly soundscapes.

It is the ultimate hardware weapon for film composers, ambient producers, modular synth enthusiasts, and avant-garde musicians looking to generate organic, texture-rich audio samples.

Missing Hardware & Modular Customization Note

• Missing Stock Metal Rods ("Antennae"): This unit is missing the two original vertical metal rods that stick out of the top chassis block (frequently referred to as the "antennae"). These are not wireless antennas; they are purely passive metal rods used to tap for bell tones or play with a violin bow for metallic drones.
• The Playground Advantage: Because the MK2 version is designed to be completely modular—featuring integrated M3 threaded metal utility strips across the chassis—you can easily slide and screw in any aftermarket metal rods, bicycle spokes, wire, or found metal objects using standard M3 thumb screws. Replacing or customizing the missing rods is incredibly easy and part of the design philosophy of the instrument.

Item Condition & Electronic Benchmark

• 100% Electronically Flawless: Both internal contact microphones capture vibrations perfectly. The low-noise preamps provide pristine, hum-free gain, and the dual output configuration tracks cleanly (allowing you to output a mixed mono signal, or split the channels into discrete audio paths).
• Excellent Onboard Sound Elements: The integrated 5-strip carbon kalimba, three premium tension springs, and the sandpaper scratch texture plate are entirely intact and highly responsive to touch, brushes, and scraping.
• Chassis Cosmetics: The wooden body and rubber decoupling feet are in good used condition with only light, minor cosmetic handling wear from studio use. The power management LED shines a healthy blue (switching automatically to red if the battery drops under 7V).

Key MK2 Upgrade Enhancements

• Upgraded Preamp Circuitry: Features Leaf Audio's revised MK2 amplifier layout, boasting extended low-end frequency responses and an even lower noise floor compared to the MK1.
• Dual Output Routing Matrix: Output 1 serves as a collective mono mix. Plugging an auxiliary cable into Output 2 instantly splits the signals—perfect for running one side through heavy distortion pedals while keeping the other side clean.
• Integrated Attenuator: The output stage includes a built-in pad/attenuator, making it safe to plug straight into high-sensitivity audio interfaces or consumer line-level gear without digital clipping.

What’s Included

• Leaf Audio Microphonic Soundbox MK2 Unit (Equipped with Kalimba, Springs, and Sandpaper Surface)
• Note: Does not include the two original stock metal rods, M3 thumb screws, a 9V battery, or a connection cable.

Standard Reverb Shipping Guidelines

• Packaging: Delicate acoustic instruments demand top-tier shielding. The fragile tension springs and kalimba tines will be safely padded with non-snagging protection layers. The entire wooden soundbox will be encased in multiple layers of heavy-duty bubble wrap and suspended floatingly inside a thick, impact-absorbing shipping container.
• Shipping: Ships promptly with tracking. Please check our feedback and buy with confidence!

This unit is priced competitively to reflect the missing stock rods. Please review all high-resolution photos carefully and message us with any questions before purchasing.

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