Doepfer A-145-4 Quad LFO Slim Line

Quad Low Frequency Oscillator

• Compact quad LFO module in Slim Line format
• Ideal for multiple modulations in Eurorack systems
• Outputs with triangular and square waveforms
• Dual-color LED indicator for each LFO
• Frequency range selectable by jumper

Doepfer A-145-4: Essential Quad LFO for Your Modular System

The Doepfer A-145-4 is a simple yet essential quadruple LFO module designed to provide reliable modulations within any Eurorack system. Despite its apparent simplicity, it is an essential tool in the synthesis chain-a true "silent worker" constantly working to enrich the sound with movement and variation.

Precise Modulations with Classic Waveforms

Each LFO in the module generates two waveforms: triangular and square, with an output range of about ±5V. The outputs are easily monitored by dual-color LEDs that indicate voltage status (red for positive, yellow for negative).

Flexibility in Frequency Range

A frequency range can be selected for each LFO by internal jumpers. You can choose between a fast range (up to 50 Hz) or extremely slow range (up to 3-4 minute cycles), making this module suitable for both rhythmic modulations and slow ambient evolutions.

Technical Specifications.

• Number of LFOs: 4 independent
• Waveforms: triangular and square
• Output: ±5V
• Visual indication: two-color LED for each LFO
• Frequency range: ~50 Hz to ~0.004 Hz (selectable via jumper)
• Width: 4 HP (20 mm)
• Depth: 30 mm
• Current consumption: +30 mA / -30 mA