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

(11) F CV 1 – Use this jack to route external control voltage or
modulation signals for the lter frequency setting into the
module via cables with 3.5 mm connectors.
(12) F CV 2 – Use this jack to route external control voltage or
modulation signals for the lter frequency setting into the
module via cables with 3.5 mm connectors.
(13) Q CV – Use this jack to route external control voltage
signals for the RESONANCE (Q) setting into the module via
cables with 3.5 mm connectors.
(14) LP – This jack sends out the nal signal from the low-pass
lter via cables with 3.5 mm connectors.
(15) HP – This jack sends out the nal signal from the high-
pass lter via cables with 3.5 mm connectors.
(16) NOTCH – This jack sends out the nal signal from the
notch lter via cables with 3.5 mm connectors.
(17) BP – This jack sends out the nal signal from the band-
pass lter via cables with 3.5 mm connectors.
Power Connection
The MULTIMODE FILTER / RESONATOR MODULE 1047 module
comes with the required power cable for connecting to a standard
Eurorack power supply system. Follow these steps to connect
power to the module. It is easier to make these connections before
the module has been mounted into a rack case.
1. Turn the power supply or rack case power o and
disconnect the power cable.
2. Insert the 16-pin connector on the power cable into the
socket on the power supply or rack case. The connector has
a tab that will align with the gap in the socket, so it cannot
be inserted incorrectly. If the power supply does not have
a keyed socket, be sure to orient pin 1 (-12 V) with the red
stripe on the cable.
3. Insert the 10-pin connector into the socket on the back of
the module. The connector has a tab that will align with the
socket for correct orientation.
4. After both ends of the power cable have been securely
attached, you may mount the module in a case and turn on
the power supply.
Installation
The necessary screws are included with the module for mounting in
a Eurorack case. Connect the power cable before mounting.
Depending on the rack case, there may be a series of xed holes
spaced 2 HP apart along the length of the case, or a track that allows
individual threaded plates to slide along the length of the case.
The free-moving threaded plates allow precise positioning of the
module, but each plate should be positioned in the approximate
relation to the mounting holes in your module before attaching
the screws.
Hold the module against the Eurorack rails so that each of the
mounting holes are aligned with a threaded rail or threaded
plate. Attach the screws part way to start, which will allow small
adjustments to the positioning while you get them all aligned. After
the nal position has been established, tighten the screws down.
Filter Curves
Q=2
NORMAL MODE
LOWPASS RESPONSE
Q=½
16 Hz
16 KHzFc
16 Hz
16 KHzFc
Q=2
LIMIT MODE
Q=½
16 Hz 16 KHzFc
16 Hz
16 KHz
Fc
Q=2 NORMAL MODE
BANDPASS RESPONSE
Q=½
Q=2
LIMIT MODE
Q=½
16 Hz
16 KHzFc
16 Hz 16 KHzFc
Q=2 NORMAL MODE
HIGHPASS RESPONSE
Q=½
Q=2
LIMIT MODE Q=½
2MULTIMODE FILTER / RESONATOR MODULE 1047

Specications
Inputs
Input
Type 1 x 3.5 mm TS jack, DC coupled
Impedance 50 kΩ, unbalanced
Max input level +18 dBu
Frequency CV input 1
Type 1 x 3.5 mm TS jack, DC coupled
Impedance 50 kΩ, unbalanced
Max input level ±10 V
CV scaling 1 V/oct.
Frequency CV input 2
Type 1 x 3.5 mm TS jack, DC coupled
Impedance 50 kΩ, unbalanced
Max input level ±10 V
CV scaling 1 V/oct.
Q CV input
Type 1 x 3.5 mm TS jack, DC coupled
Impedance 50 kΩ, unbalanced
Max input level ±10 V
CV scaling 1 V doubles the Q factor
Outputs
Filter outputs (LP / HP / BP / Notch)
Type 4 x 3.5 mm TS jack, DC coupled
Impedance 1 kΩ, unbalanced
Max output level +18 dBu
Controls
Coarse frequency 1 x rotary knob, 31 Hz to 8 kHz
Fine frequency 1 x rotary knob, x1/2 to x2
Resonance (Q) 1 rotary knob, Q = 0.5 to >256
Resonance (Norm / lim) 2-way sliding switch
Normal / limiting, switchable
Frequency CV 1 / 2 attenuators 2 x rotary knob, -∞ to unity gain
Q CV attenuator 1 x rotary knob, -∞ to unity gain
Input attenuator 1 x rotary knob, -∞ to unity gain
Notch frequency/fc 1 x rotary knob, ±3 octave range
Power
Power supply Eurorack
Current draw 55 mA (+12 V), 45 mA (-12 V)
Physical
Dimensions 43 x 81 x 129 mm (1.7 x 3.2 x 5.1")
Rack units 16 HP
Weight 0.17 kg (0.37 lbs)
Fc/4 4FcFc
Q=2
Fc
NOTCH FREQ
= ¼
Q=½ Q=½
Fc/4 4FcFc
Q=2
Fc
NOTCH FREQ
= 1
Fc/4 4FcFc
Q=2
Fc
NOTCH FREQ
= 4
Notch Responses
3Quick Start Guide

LEGAL DISCLAIMER
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or statement contained herein. Technical specications, appearances and other information are subject to change without notice. All trademarks are the property
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trademarks or registered trademarks of Music Tribe Global Brands Ltd. © Music Tribe Global Brands Ltd. 2020 All rights reserved.
LIMITED WARRANTY
For the applicable warranty terms and conditions and additional information regarding MusicTribe’s Limited Warranty, please see complete details online at
musictribe.com/warranty.
4MULTIMODE FILTER / RESONATOR MODULE 1047