Intellijel Quad VCA
Four VCAs with cascaded CV and mixing
12 HP Eurorack module
The Intellijel Quad VCA is a versatile four-channel variable response VCA with cascaded CV inputs and mixing outputs. It goes beyond simple amplitude control, featuring continuously adjustable linear-to-exponential response curves per channel and a boost switch for subtle overdrive or level boosting. The cascaded design allows creative patching configurations from independent VCAs to complex mixers.
Features
- Manual LEVEL control per VCA with CV bias capability
- Dedicated CV attenuators with dual-color LEDs for bipolar CV monitoring
- Continuously adjustable linear to exponential response per VCA
- Cascaded CV inputs (normalled to adjacent channels)
- Cascaded mix outputs with OUT 4 as master mix
- BOOST switch per channel (+6dB/2:1 gain increase)
- Dual-color CV LEDs (green for positive, red for negative voltages)
Controls & Jacks (32)
- Boost 2— Enables +6dB boost for channel 2.
- CV Attenuator 1— Controls amount of CV modulation for channel 1. Cascades from previous channel if no CV patched.
- Level 1— Sets base level/bias of channel 1 VCA. CW = approx +5V. Summed with CV input.
- CV LED 1— Red/green LED showing post-attenuator CV level. Green = positive, red = negative.
- Response 1— Linear/exponential response curve. CCW = exponential, CW = linear.
- CV 2— input cv
- Boost 4— Enables +6dB boost for channel 4.
- CV Attenuator 2— Controls amount of CV modulation for channel 2.
- Level 2— Sets base level/bias of channel 2 VCA.
- CV LED 2— Red/green LED showing post-attenuator CV level.
- Response 2— Linear/exponential response curve for channel 2.
- CV 3— input cv
- Boost 3— Enables +6dB boost for channel 3.
- CV LED 3— Red/green LED showing post-attenuator CV level.
- Level 3— Sets base level/bias of channel 3 VCA.
- CV Attenuator 3— Controls amount of CV modulation for channel 3.
- CV 1— input cv
- Response 3— Linear/exponential response curve for channel 3.
- Boost 1— Enables +6dB boost (2:1 gain) when switched on.
- CV LED 4— Red/green LED showing post-attenuator CV level.
- Level 4— Sets base level/bias of channel 4 VCA.
- CV Attenuator 4— Controls amount of CV modulation for channel 4.
- Response 4— Linear/exponential response curve for channel 4.
- CV 4— input cv
- In 3— input audio
- In 1— input audio
- In 4— input audio
- In 2— input audio
- Out 1— output audio
- Out 4— output audio
- Out 2— output audio
- Out 3— output audio
How-To Guides
- Quadraphonic Ambient Wash
- Polyrhythmic Gate Sequencer
- Tremolo Cascade Organ
- Crossfading Texture Morph
- FM Index Crossfade Controller
- Euclidean Polyrhythm Mixer
- Stereo Field Animator
Explore the interactive Quad VCA panel on BleepDex — tap any control to learn what it does.