Leaf Audio FPF (1U, 12HP Fixed Pass Filter HP/BP/LP) DIY Kit keeley-electronics a single-channel Retro 500 Series

a single-channel Retro 500 Series 2-band equalizer based upon the legendary Pultec EQP-1A

Using one hand to touch two points is less attenuation than using two hands to bridge connection

Create 32-step patterns

Designed to fit the following speaker models: QSC K12

The Switchblade Plus can be powered by a 9 volt battery or 9VDC eliminator

Leaf Audio FPF (1U, 12HP Fixed Pass Filter HP/BP/LP) DIY Kit keeley-electronics a single-channel Retro 500 SeriesLeaf Audio FPF (1U, 12HP Fixed Pass Filter HP BP LP) DIY Kit. The FPF (Fixed Passive Filter) is a straightforward yet effective utility filter designed for sculpting your synth signals with ease. Offering fixed frequency highpass, bandpass, and lowpass outputs, its great for cutting out rumble, taming harsh highs, or shaping your tone without the need for power. Perfect for beginners, this passive module comes as a complete DIY kit using only through