Ivy Pedals is proud to present the Filter IV version 2, an updated multi-mode analog filter effect pedal that now features a new control, the Q-Boost switches. Featuring two independent analog filters (a low-pass filter and a high-pass filter), each with independent level/frequency/resonance settings, the user can achieve a wide variety of filter types for an all-in-one filtering/tone shaping/EQ/mixing solution. Use the new Q-Boost switches, the toggle switch in middle (down/mid/up = off/both/HPF), and the LPF side's Q knob has a switch (at 0, CCW) that allows for Q-boost on the LPF side only. The Q-Boost is primarily for the user to access high Q values at super-low frequencies, and it is very unruly when used with higher Freq. settings.

The Filter IV is capable of seven basic filter types: Low-Pass, High-Pass, Band-Pass, Band-Stop (Notch), Low-Shelf, High-Shelf, and Band-Shelf. These filters can be achieved by using the right settings for the center switch, frequency, and volume controls. Using different combinations of setting yields different filter types.

Controls:

SERIES/PARALLEL SWITCH - this switch puts the filters in series or parallel. In Series, you have a band-pass, and in parallel, you are mixing the filters together, which allows for shelving filters, using a single filter, a notch filter, and more.

Q-BOOST - increases Q - DOWN=Off / MIDDLE=Both On / UP=HPF ONLY [LPF only mode can be accessed using the switch on the LPF Q control]

(1 for each for both the HPF and LPF)

Volume - Sets the level of the filter output. Mix level when in parallel.

Frequency - Sets the cutoff frequency of the filter, the point at which the filter starts. LPF is 'off' at 10 and HPF is 'off' at 0.

Q (Resonance) - Sets the 'quality factor' of the filter, adding a sharp peak near the cutoff frequency. Default to ~2, 10 is razor sharp and 0 is ultra-flat. LPF only Q-Boost can be accessed using the switch on the lower/left end LPF Q knob.

This pedal features true bypass switching and runs on a 9v-12v center negative DC power supply. Designed for use with guitar, bass, synthesizers, and more. Input on right, output on left!

FEEL FREE TO ASK QUESTIONS, SEE PICS, SEE VIDEO DEMOS

More information:

The LPF cutoff on this specific unit ranges from ~260Hz - 23kHz

The HPF cutoff on this specific unit ranges from ~26Hz - 26kHz

These pedals are designed so that, while the HPF may restrict certain (5+ string) bass guitar frequencies, the LPF will pass that frequency range.

HOW TO MAKE THE FILTERS

(Set Q to 2 as default, adjust as desired, does not change filter type)

Band Pass = Switch up, volumes on, HPF freq. lower than LPF freq.

Band Stop (Notch) = Switch down, volumes on, HPF freq. higher than LPF freq.

Band Shelf (EQ) = Switch down, volumes on, HPF freq. lower than LPF freq.

Low-Pass = Switch down, HPF volume to zero/off

Low-Shelf = Switch Down, volumes on, HPF freq. at 0

High-Pass = Switch down, LPF volume to zero/off

High-Shelf = Switch Down, volumes on, LPF freq. at 10