Go Outside Music has introduced the Mulch Box, a passive 8-channel patch bay and signal multiplier in guitar pedal form factor that bridges ¼″ and 3.5 mm connections for routing audio between synthesizers, effects pedals, modular systems, and recording equipment. Each of the eight “channels” provides one ¼″ jack and four 3.5 mm jacks hardwired together — completely passive, so no power supply is needed and it accepts any signal type or strength that fits through a TS (mono) cable.
The Mulch Box functions as a creative utility for experimentation: connect instruments and synths to various pedals, mixers, or recorders without rearranging your whole desk by using 3.5 mm patch cables for connections while leaving main I/O cables plugged in. It can split audio to multiple outputs for parallel processing, combine signals by sending multiple sources to the same output, and serve as a 3.5 mm–¼″ adapter for integrating modular rigs with pedals, tape machines, or other gear. Because it requires no power, it is infinitely portable.
Being completely passive and unbuffered, splitting a signal divides its gain between splits (quieter), while combining signals adds their gains together (louder). The maker notes that electrical components receive information from both sides of the signal flow, so results can differ from the sum of parts — downstream gear can affect upstream signals. A buffer before splitting (such as a drive/boost/tuner pedal between guitar and Mulch Box) is recommended when sending one source to multiple outputs.
The Mulch Box is made-to-order in batches with a 2–6 week turnaround time; purchasers receive a notification email when their pedal ships. Patch cables are sold separately. The unit ships worldwide from the maker’s shop at $175.
Source: Go Outside Music, October 2026
Available now (made-to-order): $175, ships worldwide. 2–6 week lead time. Patch cable bundle $35 sold separately.