Behringer 921A Oscillator Driver Module

Modular Synthesis

The first System 55, 35 and 15 synth modules came out in the early 70s and tended to be extremely expensive. They were mainly all discrete transistor designs as op-amps at the time were very high cost. The discrete circuitry gave the modules a very distinctive sound and were used by artists like Keith Emerson, Stevie Wonder, Tangerine Dream and so many more, giving us some of the greatest records we’ve ever heard. Modular synths were a landmark development in electronic music and today, it’s about to get better.

921A OSCILLATOR DRIVER

Enter the Behringer 921A OSCILLATOR DRIVER. An authentic reproduction of the circuitry from the “Modular 55 and 35” series oscillator drivers used by the world’s most famous pop, rock and jazz musicians. Now you can build your very own, unique synthesizer that can fit in a standard Eurorack case for a very affordable price. Mix and match with specific modules to customize your synth and complement the genre of music you play or go all out and have a room filled from floor to ceiling with modules that’ll fulfill any synth geek’s wildest dreams.

Controls

The 921A OSCILLATOR DRIVER module features a frequency knob that can adjust between either octave or semitone frequencies. The included rocker switch can be used to select between the two frequency types. The width of the rectangular wave is adjusted via a control knob that goes from 10% up to 90%. You can also connect any incoming control voltage or modulation signal into either of the 3.5 mm Frequency or Width inputs.

• Controls up to 12 parallel 921B OSCILLATOR modules

• Authentic reproduction of the circuitry from the "Modular 55 & 35" Series

• Artist roster includes world's most famous pop, rock and jazz musicians

• 2 summed CV inputs for frequency control and 2 summed CV inputs for PWM

• High current outputs for frequency and pulse width to drive multiple 921B modules

• Switchable semitone/octave selector and manual pulse width control

• Eurorack specs: 8 HP, 15 mA +12 V, 15 mA -12 V