Vintage Edition in black! The Doepfer A-135-2 is a highly compact and flexible quad VCA and audio mixer, now in just 8HP. This powerful module offers four voltage-controlled linear VCAs with individual outputs and two mix outputs for creative routing. Each channel includes dedicated gain and CV attenuator controls, making it ideal for complex modulation and mixing tasks.

The A-135-2 can be used in multiple ways: as a quad VCA, a dual stereo VCA, a four-channel mixer, or as a voltage-controlled quadraphonic signal distributor. All inputs and outputs are DC-coupled, meaning the module is equally suited for audio and control voltages.

Each channel features:

• Audio input with attenuator

• CV input with attenuator

• Gain control (manual and CV)

• Individual output

Sum outputs:

• Selected Out: Sums all channels except those with patch cables in their individual output jacks

• All Out: Sums all four channels, regardless of patching

Internal normalization between inputs allows for quadraphonic distribution using a single input and varying CV control across channels.

• 4-channel linear VCA with mixer functionality

• DC-coupled – suitable for audio and CV

• Per-channel CV and audio attenuation

• Selected and All summed outputs

• Compact 8HP format in Vintage black edition

• Internal normalisation for quad distribution