Behringer 305 EQ/MIXER/OUTPUT User manual

Quick Start Guide
305 EQ/MIXER/OUTPUT
Legendary Analog Parametric EQ,
Mixer and Output Module for Eurorack
Controls
(1) MIXER INPUTS (1 / 2 / 3 / 4) – Use these jacks to route
audio signals into the OUTPUT MIXER section via cables
with 3.5 mm connectors. Channel 1 includes a pre-wired,
normalled connection from the parametric EQ section, so
the PARAMETRIC EQ output can directly enter the Channel
1 signal path just before the volume slider. If a 3.5 mm
connector is inserted into the MIXER INPUT 1 jack, the EQ
output is disconnected and replaced by the incoming jack
signal from MIXER INPUT 1.
(2) VOLUME SLIDERS – Use these sliders for independent
volume control of each input channel.
(3) PANPOT – These knobs control each channel’s placement
in the stereo eld.
(4) LEVEL (1 / 2 / 3 / 4) – Use these knobs to cut or boost each
of the PARAMETRIC EQ’s four frequency bands.
(5) BANDWIDTH – These knobs control the width or
narrowness of the parabolic lter curve for each frequency
band. Higher values narrow the curve, while lower values
produce a wider, gentler parabolic curve.
(6) FREQUENCY – Use these knobs to adjust the placement
of each EQ lter around the center value shown just above
the knob.
(7) IN – Use this input to route external signals into
the PARAMETRIC EQ section via cables with 3.5 mm
connectors. The IN jack’s associated signal and clip LEDs
read the input signal level when BYP is selected on the
EQ/BYP sliding switch. When EQ is selected on the EQ/BYP
sliding switch, the LEDs read the EQ output level.
(1)
(2)
(3)
(7)
(4)
(5)
(6)
(8)
(9)
(14)
(15)
(12)(13)(11)
(10)
V 1.0
(8) EQ/BYP – This sliding switch turns the PARAMETRIC EQ
circuit on or o. When the switch is in the BYP position,
and the EQ circuit is inactive, the signal coming in through
the IN jack will be passed through unaltered to the
Channel 1 mixer channel.
(9) EQ OUT (1 / 2) – Use these parallel output jacks to send
the PARAMETRIC EQ section’s processed signal out for use
elsewhere via cables with 3.5 mm connector. When the
EQ/BYP switch is in the BYP (bypassed) position, the signal
coming in through the IN jack will be duplicated at the EQ
OUT outputs.
(10) MIX LEVEL – Use this knob to adjust the volume of the
STANDARD OSC output before the adjusted signal is then
sent to the headphone LEVEL control and the nal MASTER
VOLUME control.
(11) FREQ (OFF / 220 / 440 / 880) – This sliding switch turns
the onboard oscillator (STANDARD OSC) on or o and
chooses the oscillator’s frequency. The oscillator’s output
goes to the OUTPUT MIXER section as a pre-wired parallel
connection, like an additional fth mono channel, that
is blended into the mixer section’s output using the MIX
LEVEL control.
(12) MASTER VOLUME – Use this knob to make nal level
adjustments before the mix goes to the MASTER OUTPUTS.
(13) MASTER OUTPUTS – Use these outputs to send out the
nal mix via separate left and right jacks via cables with
either 3.5 mm or ¼” connectors. For a single mono output,
use only the output labeled L/MONO.
(14) LEVEL (PHONES) – Use this knob to control the volume
level for the PHONES output.
(15) PHONES – This output sends out the nal mix for
headphones with a 1/8” stereo connector.
Power Connection
The 305 EQ/MIXER/OUTPUT 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.
Specications
Inputs
EQ input
Type 3.5 mm TS jack, AC coupled
Impedance 40 kΩ, unbalanced
Max input level +18 dBu
Mixer input
Type 4 x 3.5 mm TS jacks, AC coupled
Impedance > 25 kΩ, unbalanced
Max input level +21 dBu
Outputs
EQ output
Type 2 x 3.5 mm TS jacks, DC coupled
Impedance 330 Ω, unbalanced
Max output level +18 dBu
Noise with EQ set at < -90 dBu, 22 Hz to 22 kHz
Master output
Type 2 x 3.5 mm TS jacks
2 x ¼" TS jacks
AC coupled
Impedance 700 Ω, unbalanced
Max output level +8 dBu
Noise with 1 channel open < -100 dBu, 22 Hz - 22 kHz
Phones output
Type 3.5 mm TRS stereo jack, AC coupled
Impedance 50 Ω, unbalanced
Max output level +18 dBu
Controls
EQ level ±12 dB, 0 dB center detent
EQ bandwidth Q range 0.9 to 9
EQ frequency range 1 20 Hz to 200 Hz
EQ frequency range 2 100 Hz to 1 kHz
EQ frequency range 3 500 Hz to 5 kHz
EQ frequency range 4 2 kHz to 20 kHz
EQ bypass switch O / on
OSC frequency switch O / 220 Hz / 440 Hz / 880 Hz
OSC mix level -∞ to unity gain
Mixer input fader -∞ to unity gain
Mixer panpot -∞ to unity gain, -3 dB center detent
Master volume -∞ to -10 dBu
Phones level -∞ to +10 dBu
Power
Power supply Eurorack
Current draw 120 mA (+12 V), 100 mA (-12 V)
Physical
Dimensions 53 x 122 x 129 mm (2.1 x 4.8 x
5.1")
Rack units 24 HP
Weight 0.28 kg (0.62 lbs)
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2020 All rights reserved.
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