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.
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 flat |
< -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 |
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
| 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) |