Here's what KMA say about the the Belfry Buffer:
The Belfry Buffer is KMA Audio Machines’ take on a high-fidelity studio-quality buffer that’ll keep your signal safe from the tone-sucking constraints of long cable-runs and epic pedalboards the size of a small spaceship. This leaves your instrument sounding as crisp, clear and natural as if it was going straight into an amp and nothing else.
Belfry sports a unique multi-path design with two buffers running in parallel in order to greatly reduce noise (123dB signal-to-noise ratio and a mind-bogglingly low Total Harmonic Distortion rating of 0,0007%) and to push the output stage for a supremely free-flowing signal.
The Belfry’s high 1Meg input impedance ensures that even pedals with a high output impedance can be used before it without any issues, while the low 200Ohm output impedance will guarantee a full frequency spectrum, independent from what’s coming after the Belfry.
Hence you won’t experience any tone colouration such as the dreaded over-pronounced and shrill highs, which can be typical for many lower quality buffers. With the Belfry, you will simply sound like you again. Nothing less, nothing more.
Powered by a standard 9V DC power supply, the Belfry internally converts this to 18V for massively increased headroom. This helps you preserve your precious core signal and consequently tone, including all the sparkling highs and that nice round and punchy low-end.
In addition, Belfry sports a super-small housing in order for it to fit on or even under your pedalboard without any problems.