Behringer 2500 Series - User Manual

Quick Start Guide
MULTIMODE FILTER /
RESONATOR MODULE 1047
Legendary 2500 Series 12dB State
Variable Filter Module for Eurorack
Controls
(1) COARSE – Use this knob to dial in the general frequency
area you want for the high-pass threshold, low-pass
threshold, band-pass center frequency and notch lter
center frequency, then go to the FINE knob to rene the
frequency setting. The frequency set by the COARSE and
FINE knobs (“fc”) will be used simultaneously for every
lter in the module.
(2) FINE – Use this knob to rene and focus the frequency set
by the COARSE FREQUENCY knob.
(3) RESONANCE (NORM/LIM) – This sliding switch lets
you choose between normal resonance mode (NORM)
and limiting mode (LIM), which limits the height of a
lter’s resonant peak. The LIM setting prevents circuit
overload when focusing a lter on a strong harmonic or
fundamental frequency, especially at high Q settings on
the RESONANCE (Q) knob. In other situations, the LIM
setting can result in a very low output signal, and so the
NORM setting is usually preferred.
(4) RESONANCE (Q) – This knob controls the width/
smoothness and narrowness/sharpness of the lter
curves. At low Q settings, the lter curves are wider and
smoother, with a gentler eect on the sound (except for
the notch lter, which functions most eectively at low
Q settings). As you increase the Q setting, the lter curves
gradually become narrower and sharper, which can help
you to focus in on narrow frequency bands. At higher Q
settings, the various lters can produce resonant peaks
in the lter curves that boost some frequencies and may
require moving the RESONANCE (NORM/LIM) switch to
the LIM setting to prevent overloading the circuit (or the
INPUT attenuator knob can be turned down).
(5) F CV 1 – This knob adjusts the strength of the control
voltage signal coming in through the F CV 1 jack.
(6) F CV 2 – This knob adjusts the strength of the control
voltage signal coming in through the F CV 2 jack.
(7) NOTCH FEQUENCY/fc – Use this knob to oset the notch
lter’s center frequency (“fc”) set by the COARSE and FINE
frequency controls. For standard notch lter behavior, the
NOTCH FREQ/fc control should be set to “1” on the scale.
This standard setting can then be tweaked by moving the
NOTCH FREQ/fc knob very slightly around “1”. Also, if
higher Q values are added via the RESONANCE knob while
the notch lter is oset from fc, the higher Q values result
in a resonant peak at fc, with the notch at the point set by
the NOTCH FREQ/fc knob.
(8) INPUT – This knob adjusts the strength of the audio signal
coming through the INPUT jack.
(9) Q CV – This knob adjusts the strength of the Q control
voltage signal coming in through the Q CV jack.
(10) INPUT – Use this jack to route audio signals into the
module via cables with 3.5 mm connectors. You can also
route in a keyboard gate signal to “ring” the lter and
produce a unique percussive sound when you press a key.
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10) (11) (12) (13) (14) (15)
(17)
(16)
Knob Setting Eect
Full CCW
Notch lter output becomes a
copy of the high-pass output
CCW to 1/4
Notch frequency shifts
signicantly below fc
CW to 4
Notch frequency shifts
signicantly above fc
Full CW
Notch lter output becomes a
copy of the low-pass lter output
V 1.0

Summary

Module Controls

COARSE Frequency

Sets the general frequency area for filter thresholds and center frequencies.

FINE Frequency

Refines the frequency setting established by the COARSE knob.

RESONANCE (NORM;LIM) Switch

Selects between normal resonance mode or limiting mode for resonant peaks.

RESONANCE (Q) Control

Adjusts filter curve width/smoothness and narrowness/sharpness.

Control Voltage (CV) Attenuators

Adjusts strength of control voltage signals for Frequency (F CV 1, F CV 2) and Q.

NOTCH FREQUENCY;fc Control

Offsets the notch filter's center frequency; standard setting is '1'.

INPUT Attenuator and Jack

Adjusts audio input signal strength and provides the input jack.

Filter Curves

Lowpass Response

Illustrates lowpass filter frequency response at different Q settings and modes.

Bandpass Response

Illustrates bandpass filter frequency response at different Q settings and modes.

Highpass Response

Illustrates highpass filter frequency response at different Q settings and modes.

Module Connectivity and Power

Signal Jacks and CV Inputs

Details on control voltage inputs (F CV 1, F CV 2, Q CV) and audio outputs (LP, HP, Notch, BP).

Power Connection Procedure

Instructions for connecting the module to a Eurorack power supply system.

Installation into Eurorack Case

Steps for physically mounting the module into a Eurorack case.

Specifications

Inputs

Details on input types, impedance, maximum level, and CV scaling for various jacks.

Outputs

Details on output types, impedance, and maximum level for filter outputs.

Controls

Summarizes all controls: frequency, resonance, attenuators, and notch frequency.

Power

Specifies Eurorack power supply compatibility and current draw.

Physical

Provides dimensions, rack unit size, and weight of the module.

Behringer 2500 Series Specifications

General

Brand	Behringer
Model	2500 Series
Category	Control Unit
Language	English