WORKING CONDITION: Excellent. This module tests perfectly within an existing Eurorack system.

PHYSICAL CONDITION: Excellent. All metalwork, knobs, power pins, and iO jacks are in excellent physical condition.

INVENTORY #58913

BRAND: Doepfer

MODEL: A-143-4 Quad VCLFO / VCO

FUNCTION: Eurorack Synthesizer Module

PRODUCT DESCRIPTION: This listing is for a Doepfer A-143-4 Quad VCLFO / VCO Eurorack Synthesizer Module. The Doepfer A-143-4 Quad VCLFO / VCO is a versatile Eurorack module featuring four independent triangle-core voltage-controlled oscillators (VCOs) that can operate as either low-frequency oscillators (LFOs) or audio-frequency oscillators. It is a powerful tool for complex modulation, polyphonic patching, or generating thick, detuned audio textures.

SPECS:

• Oscillators: Four independent units, each with a frequency range switch (Low = LFO mode, High = VCO mode).
• Outputs: Each unit provides dedicated Triangle and Rectangle wave outputs.
• Summing: Includes a sum output for both triangle and rectangle waves, with internal jumpers to select which channels are summed.
• Frequency Range: Capable of frequencies from under 0.001 Hz (approx. one hour per cycle) in ultra-low LFO mode up to 15 kHz in VCO mode.
• CV Inputs: Each unit has two CV inputs:
  • CV1: Fixed at approximately 1V/octave.
  • CV2: Equipped with a manual attenuator.
• Common Control: A master section allows simultaneous frequency control over all four units via two CV inputs and a manual knob.
• Quadrature Mode: Adjacent oscillators can be run at phase-shifted outputs, ideal for complex, evolving modulations.
• Sync & Reset: Units 1–3 feature combined Reset/Direction inputs, while Unit 4 offers separate Reset and Direction inputs with a dedicated Up/Both/Down switch.
• Visual Feedback: Red and yellow LEDs indicate negative and positive output voltages for the triangle waves.
• Thermal Stability: Includes a "tempco" circuit (oven) that stabilizes the exponential converter's temperature for more reliable tuning, requiring a roughly 15–20 minute warm-up time.
• Width: 22 HP
• Depth: 60 mm
• Power Consumption: +100 mA (+12V) / -100 mA (-12V)

ACCESSORIES INCLUDED:  

• Eurorack Power Cable
• (4) Eurorack Screws

UNPACKAGED WEIGHT: 1 lbs.

UNPACKAGED DIMENSIONS: 5" x 3" x 5"