Bananalogue LPFA

A DIY or assembled Frac Rack format low-pass filter module inspired by the Arp 4075 design.

Overview

The Bananalogue LPFA is a modular synthesizer filter based on the Arp 4075 style, designed for use in analog synth systems. Manufactured by Bananalogue, it functions as a low-pass filter and was primarily offered in Frac Rack format. The module was available either as a printed circuit board (PCB) for self-assembly or as a fully assembled unit. A Kickstarter campaign was launched to produce a series of these modules, indicating a small-scale, community-driven release rather than mass production.

Design

The Bananalogue LPFA is built around the design principles of the Arp 4075 filter. It was released in Frac Rack format, and there was discussion within the community about developing a Eurorack version. The module was distributed in both PCB-only and assembled forms, catering to DIY enthusiasts and those seeking plug-and-play functionality.

Context

An original run of Bananalogue LPFA modules took place several years prior to 2012, with a subsequent Kickstarter project aiming to produce additional units. The module emerged from a niche community of modular synth builders, often discussed alongside other Arp-inspired filters like the STG Post Lawsuit Filter—though that unit is based on the Arp 4072. The existence of leftover Arp 4075 PCBs from the original run suggests limited production volume and potential collector interest among modular synth hobbyists.

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