Unsupported Browser
The web browser that you are currently using is no longer supported, and as such features of this website may not work as expected. We advise you to update to a currently supported browser (such as Chrome, Edge, or Firefox) to improve your security, speed, and overall experience.
Key Features
The Analogue Systems RS-500e EMS Filter is an officially licensed remake of the EMS low-pass filter with variable resonance. The RS-500e offers 2 CV response modes, allowing to switch between to gather the desired sound. Thanks to the new dual-bus concept, this circuit is fully compatible to Doepfer's eurorack standard. This version features 2 power connectors, meaning it can now directly connect to to an Analogue Systems modular system or Doepfer modular systems, so no adapters are needed. CV Slew Fast provides rapid cutoff frequency, which is ideal for percussive, snappy sounds, whereas CV Slew Slow is ideal for recreating bubbling and warbling effects.
Product Ref: 95323
The dual bus version of the RS-500e features 2 power connectors. This allows it to connect directly either to an Analogue Systems modular system, or a Doepfer modular system. Adapters are no longer necessary. Because of the different position of mounting holes, there will be a gap of 0.5HP (2.5)mm when mounting an Analogue Systems module next to a eurorack module. Gaps can be convered by 1.5HP wide blank panels from Doepfer.
The RS-500e is a low-pass filter based on the original EMS VSC3 and portable Synthi AKS synthesizers from the early 70's. Analogue Systems have kept the circuitry as close to the original as possible to ensure the filter retains the same characteristics. However, Analogue Systems have added a few updates and controls that were not available on the original. The RS-500e now features voltage control of response (resonance), allowing you to use CV to control the resonance. The RS-500e now allows the cutoff frequencies to respond more rapidly, allowing you to create snappy, percussive sounds. You can use the switch to change the sound. The RS-500e offers the ability to switch between different octave filter slopes. You can change between 18dB/octave and 24dB/octave slopes, resulting in different sounds.
The Analogue Systems RS-500e offers 2 CV response modes, allowing you to switch between them depending on the type of sound you want. In CV Slew Slow mode the filter will respond slowly to rapid changes in incoming CVs, which is ideal for creating bubbling and warbling effects that early VCS3s and Synthis were famous for. Switching to CV Slew Fast makes the filter more responsive, which is ideal for creating snappy, percussive sounds. With the RS-500e you can also change the filter slope to Pre-1974 and Post-1974. This essentially alters the way in which the upper frequencies are removed from an audio signal passing through the device. In Pre-1974 mode, the module uses a 18dB/oct filter slope, recreating the sound of EMS synthesizers built before 1974, whereas in Post-1974 mode, the module uses a 24dB/oct slope, recreating the sound of EMS synthesizers built from 1974 onwards.