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Behringer 305 EQ/Mixer/Output Eurorack Module

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Product Information

Modular Synthesis

The 80s was the golden age of electronic music. Synthesizers were at their prime and almost every hit song and movie soundtrack at that time had a synth in one form or another. Modular synths have become more and more popular with professionals and enthusiasts over the years and they’re about to get even better.


This is the Behringer System 100 305 EQ/MIXER/OUTPUT Module. A parametric EQ, mixer/oscillator and headphone amp combo that’s an authentic reproduction of the original “System 100M” circuitry from the 80s that can fit in a standard Eurorack case. The best part? It’s at a very affordable price! Mix the 305 in with your existing rig or start your modular synth journey from here. Either way you’re sure to have a lot of fun!

Sculpting Your Masterpiece

The 305 allows for maximum tone shaping with its 4-channel EQ section complete with level, bandwidth and frequency controls that span a wide frequency spectrum from 20 Hz all the way up to 20 kHz. Using the two outputs of this section, you can then patch signals to two different modules for some extra modulation and waveform sculpting possibilities and even switch between EQ’d and Bypass modes for a quick comparison.

Start Mixing

For added mixing capabilities, you can use the 305’s 4-input mixer with individual pan and level controls. The output signal can be in either mono or stereo via 3.5mm and ¼” jacks. Monitor your overall signal though the independent headphone output and its included level control.

Eurorack Ready

Installing the 305 EQ/MIXER/OUTPUT is simple as it was designed to fit into a standard Eurorack case. Just connect the power cables to the power supply and mount the module using the included screws. This allows for the 305 EQ/MIXER/OUTPUT to be mixed with other synth modules for a truly unique set up.

Complete Your Collection

Whether you’re just getting into modular synths or looking to complete your collection, the 305 EQ/MIXER/OUTPUT module from Behringer is a great tool to have when creating amazing music.

Get the 305 EQ/MIXER/OUTPUT from your local Behringer dealer today!

  • Combination of amazing parametric EQ, mixer/oscillator and headphone amplifier module from the early '80s

  • Authentic reproduction of original "System 100M*" circuitry

  • 4-channel EQ section with level, bandwidth and frequency controls plus direct out for maximum flexibility

  • 4-input mono mixer with pan and 2 adjustable mono/stereo master outputs

  • Tuning oscillator with 3 selectable frequencies (200/400/800 Hz) and level control

  • Independent headphone output with level control

  • Bypass switch for quick comparison of EQ signals

  • 25 controls give you real-time access to all important parameters

  • Eurorack specs: 20 HP, 120 mA +12 V, 100 mA -12 V



EQ input

3.5 mm TS jack, AC coupled


40 kΩ, unbalanced

Max input level

+18 dBu

Mixer input

4 x 3.5 mm TS jacks, AC coupled


> 25 kΩ, unbalanced

Max input level

+21 dBu


EQ output

2 x 3.5 mm TS jacks, DC coupled


330 Ω, unbalanced

Max output level

+18 dBu

Noise with EQ set flat

< -90 dBu, 22 Hz to 22 kHz

Master output

2 x 3.5 mm TS jacks 2 x ¼" TS jacks AC coupled


700 Ω, unbalanced

Max output level

+8 dBu

Noise with 1 channel open

< -100 dBu, 22 Hz - 22 kHz

Phones output

3.5 mm TRS stereo jack, AC coupled


50 Ω, unbalanced

Max output level

+18 dBu

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

Off / on

OSC frequency switch

Off / 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 supply


Current draw

120 mA (+12 V), 100 mA (-12 V)


53 x 122 x 129 mm (2.1 x 4.8 x 5.1")

Rack units

24 HP


0.28 kg (0.62 lbs)


3 Years Warranty

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