The PPG 317 Voltage Controlled Filter dates back to 1976 and the beginnings of PPG when they were a modular synthesizer company based in Hamburg. The The first set of modules was named the 100 series which are visually similar to the Moog modular but with different circuits and panel lettering in German. Some early […]
Continue Reading
The 12HP wide AM1044 is a re-issue and expansion of the original AM8044 from 2013, using the CoolAudio V2044A chip and some design ideas from the SSI2144 datasheet. The V2044A delivers a fantastic sounding transistor ladder filter, which we have added some amazing Q compensation to. AM1044 circuit The V2044A is a re-imagined SSM2044 chip […]
Continue Reading
In 1976 the EMS Eight Octave Filter Bank was a key part of both Klaus Schulze’s and Tangerine Dream’s sound. The 1U rack unit with beautiful wooden case can be seen one top of Peter Baumann’s customised Moog 960 Sequencer as well as Klaus Schulze’s IIIp, where it was usually placed on top of his […]
Continue Reading
The AM1076 module has three vactrol filters which can be independently adjusted for frequency, resonance and modulation depth. The modulation inputs are usually driven by one or more LFO’s to create band pass sweeps. Description ARP 2500 style knobs at the top of the front panel are used to adjust the level of the individual filter […]
Continue Reading
This module is based around the CEM3328 4-pole Low Pass Filter chip that was released in 1984, as one of the last filter chips and with some great features. It has differential signal inputs, an accurate exponential scale over 14 octaves and voltage controlled resonance. It has a unique feature, the signal level is automatically […]
Continue Reading
One of the Moog modules that Klaus Schulze frequently used was the 904C Filter Coupler to create band pass and band reject sounds. You can see it patched into Band Reject mode in live shows from 1975 – 1979. AMSynths have recreated this module in Eurorack, so that you can build a Moog Modular III […]
Continue Reading
The AM991 is a replica of the original Moog module that was included in the Modular II and III systems from the 1960’s. It is a pair of fixed filters (single pole -6dB Low Pass and High Pass) and an attenuator. There are five filter positions for each filter, and the extra attenuator is really […]
Continue Reading
This 14HP module is a re-imagining of the ARP 1013 octave filter bank that was announced in 1970 by Tonus as part of the 2500 Synthesizer but it never made it into production. It consists of eight band pass filters with their cutoff frequency spaced one octave apart, from 63Hz to 8 KHz. The filter […]
Continue Reading
The 12HP wide AM1006 is a re-imaging of the first filter that ARP launched in 1970 as part of the 2500 synthesizer – the 1006 module. Why do this again? The aim of the 2025 Edition is to get as close to the original sound and user interface as possible, in Eurorack. I don’t expect […]
Continue Reading
A replica of the 24dB Low Pass and 6dB High Pass Filters from the legendary Roland Jupiter 8. This is an OTA design that Roland first used in the Jupiter 4 in 1980, and then added Q compensation for the Jupiter 8. This is a warm sounding filter with smooth frequency control and a resonance […]
Continue Reading