Mixer Attenuator Modules

• Compact 4-channel mixer
• Suitable for CV and audio signals
• Volume control per channel
• 4 Inputs
• 2 Mix outputs
• Power requirements: +10 mA (+12 V) / -10 mA (-12 V)
• Width: 4 HP
• Depth: 30 mm

• Controls for VCA gain, 2 aux paths (pre / post switch), panorama / crossfade and level
• Mute and PFL buttons
• Solo-In-Place switch
• CV inputs for VCA gain, panorama / crossfade and aux send level
• Stereo input
• Stereo direct out
• Current consumption: 70 mA (+12 V) / 45 mA (-12 V)
• Width: 6 TE
• Depth: 38 mm

The module A-132-4 contains four identical voltage-controlled amplifiers (VCA) with exponential normalization. Each VCA has two control voltage inputs (CV1, CV2), a signal input (In), and a signal output (Out). The control voltage inputs CV1.1 and the signal inputs In1 can be bridged with the control voltage input CV2.1 via internal jumpers and with the signal input In2. This circuit is also available between amplifiers 2 and 3 as well as between amplifiers 3 and 4. If this circuit is not desired, then the jumpers must be removed.

In addition, the sum of all four outputs is available (lower left socket with the sum symbol). Therefore, amplifier 4 has only one control voltage input (CV4.1). If necessary, this socket can be bridged as control voltage input 2. Then the sum signal will no longer be available.

For each VCA output a jumper is available, which determines whether the output signal of the corresponding VCA is added to the sum signal. By default, all four jumpers are set (all four VCA output signals are added). By removing one or more of the jumpers, you can select which VCA output is added to the sum. The bridges can also be replaced by switches.

• Four exponential VCAs
• Designed mainly for audio signals
• Sum of all four outputs is available
• Width: 6 HP
• Depth: 60 mm
• Power requirement: +30 mA (+12 V) / -20 mA (-12 V)

• 4 Passive attenuators with normalised inputs
• 4 Outputs for a fixed reference voltage (2x +6 V and 2x -6 V)
• 2 Passive 4-jack multiples
• Current draw: 1 mA (+12 V) / 1 mA (-12 V)
• Width: 21 HP
• Depth: 35 mm

• Quad Attenuator
• 4 Identical channels, each with input, output and attenuator knob
• Passive design (no power supply required)
• Width: 4 U
• Depth: 20 mm

• 4-Channel crossfader for audio and CV signals
• Per channel: two inputs with attenuators, crossfader CV input, crossfader signal LEDs, selector switch for CV/audio characteristic, crossfader output
• Output of channel 4 provides a mix of all channels
• All inputs normalised to 10V for use as CV controllers
• Master crossfader with adjustable delay time (lag) of 0-15 s
• Current consumption: 53 mA (+12 V) / 50 mA (-12 V)
• Width: 12 HP
• Depth: 26 mm

• Dual 3: 1/6: 1 Unity Gain Mixer
• Dual 3: 1 audio and CV mixer
• Output of the upper mixer is normalized to the lower mixer
• Input signals are neither amplified nor attenuated
• Width: 2 HP
• Depth: 29 mm
• Power requirement: +11 mA (+12 V) / -14 mA (-12 V)

• Quad Attenuator
• 4 Identical channels, each with input, output and an attenuator button
• Current consumption: 10 mA (+12 V) / 10 mA (-12 V)
• Width: 4 TE
• Depth: 25 mm

• 4-in-2 mix module in Eurorack format
• Four inputs with attenuator and pan control, plus two 3.5 mm mini jack outputs
• Width: 8 HP
• Depth: 30 mm
• Power requirements: +10 mA (+12 V) / -10 mA (-12 V)

• Two independent bidirectional sections with one input/output and 4 outputs/inputs each
• Outputs/inputs 1 - 4 operate with a signal attenuation of 5%, 20%, 40% and 60%
• Suitable for distributing and mixing audio and CV signals
• Passive construction (requires no power supply)
• Width: 14 HP
• Depth: 10 mm

• Two-channel attenuator, inverter, multiplier, attenuverter, mixer, and DC voltage source
• Current draw: 12 mA (+12 V) / 10 mA (-12 V)
• Width: 14 HP
• Depth: 22 mm

• 6-Channel performance mixer
• Adjustable per channel: Panorama, Hi-EQ, Mid-EQ, Low-EQ
• Mute (switch and button)
• Volume
• Master section with 3-band EQ
• Level LEDs
• Master volume control and stereo output: can be expanded with Befaco Hexpander and Hex Mix VCA
• Current consumption: 106 mA (+12 V) / 88 mA (-12 V)
• Width: 28 HP
• Depth: 27 mm

• Analog CV and audio processor for a wide range of tasks
• Contains two separate 3-channel Unity Gain mixers
• Two attenuators / boosters and two bipolar offset controls
• Different operating modes configurable by Jumer
• 2 x 3 Inputs for mixer A & B
• Outputs for Mix A & B
• Outputs for Scale A & B
• Outputs for minimum / maximum values of both mixers
• Current consumption: 42 mA (+12 V) / 38 mA (-12 V)
• Width: 10 TE
• Depth: 35 mm

• 2 x 4 / 1 x 8 Mixer for audio signals and control voltages
• Mixer A and mixer B with 4 inputs each and a level control per channel
• Mixer A DC-coupled and with positive and inverted output
• Mixer B switchable between AC- / DC-coupling via a jumper
• Common master output
• Current requirement: 20 mA (+12 V) / 20 mA (-12 V)
• Width: 8 TE
• Depth: 25 mm

• Mixer / switcher
• Dual 2: 1 mixer
• Normalised 4: 1
• Click-free mute
• Click-free polarity reversal per input with LED indicator
• Modulation vs. Audio mode selection (lin / log) pr mixer
• 2 LEDs on each output indicate the amplitude and polarity of the output signal
• Non-connected inputs have a fixed voltage to facilitate offset generation
• DC-coupled analogue signal path
• Switch between 4 inputs, only 2 or disabled
• Input sequential or random via clock / trigger selectable
• Input selectable depending on the control voltage
• Settings are retained via the circuit
• Current consumption: 39 mA (+12 V) / 24 mA (-12 V)
• Dimensions: 8 TE / HP x 25 mm (W x D)

• Vintage Edition with black front panel
• 4-in-2 Mix module in Eurorack format
• Four inputs with attenuator and pan control and two outputs 3.5 mm mini jack
• Power consumption: +10 mA (+12 V) / -10 mA (-12 V)
• Width: 8 TE / HP
• Depth: 30 mm

• Control knobs per channel: Gain, output volume, pan and AUX, as well as mute switch and level LED
• Several input modules can be cascaded
• Width: 16 HP
• Depth: 40 mm
• Power requirements: 0 mA

Note: The A-138p module requires an A-138o module for operation; the A-138p module can not be used alone. (A-138o available under article nr 399260)

• Contains 3 channels, each with bipolar attenuator, input, and output
• Input from channel 1 is normalised to inputs 2 and 3
• Current draw: 40 mA (+12 V) / 40 mA (-12 V)
• Width: 4 HP
• Depth: 25 mm

• Analogue dual mixer
• MAR offers 2 independent mixers in one module
• Mixer X with 4 inputs and volume control per channel
• Normal (X+) and inverted output (X-) available
• Mixer Y sums up 4 inputs to a common sum knob
• Outputs for Y and X+Y available
• Output of Mixer X can be normalised to Mixer Y
• Processes audio, CV, trigger and gate signals
• Noise-free audio quality with high headroom
• All controllers with logarithmic characteristic curve
• Power requirements: +20 mA (+12 V) / -20 mA (-12 V)
• Width: 8 HP
• Depth: 20 mm