Search by Text Search Results: "4-Pole revisions" Found "4-Pole revisions" 1 time here: Product: 4-pole Q: Are there Curtis and/or Pulse filter 4-Pole revisions? A: There are 3 Versions known for the 4-Pole: 4-Pole Beta Unit (Curtis) This one was used during the beta phase back in 1995. Part of the testing was done in Gasthof Goldener Hirsch in 92275 Hirschbach / Frankenalb / Germany. Testresults from that week have been sent by postcard to Waldorf. The buttons are swapped on that specific unit. That happened during all the swapping of EPROMs during beta phase. Firmware Update via Midi was introduced first time with the Microwave II. 4-Pole Production Unit (Curtis) Technically quite close to the beta-unit, some slight hardware changes, i.e. the trigger hardware has been improved. The labeling is differnt compared to the beta-unit since more and different features have been packed in during development. 4-Pole Production Unit (Pulse Filter) Silkscreening slightly changed here, most important is the change from 9V AC power input to 12V DC. Useful when you are chasing up one or the other version. Looks like this version has a green/red LED to show the overdrive status of the gain stage. The Curtis and Pulse filter revisions sounded very different when testing them here. We had problems comparing them, because the parameters did not match. So the envelope times, the cutoff and the resonance were very different. We did not come close in sound within 30 ins of trying to do the same filter sweep. The Curtis filter versions sounded more transparent and had a nice resonance without loosing bass on higher settings. The Pulse filter sounded more powerful. But bass level dropped on higher resonance settings (a typical Moog filter thing). The Waldorf Team of that time was: Stefan Stenzel (software) Andreas Busse (software MW I and WAVE mainly) Thomas Kircher (electronics) Axel Hartmann (design) Joachim Maier (he did some coding for the 4-Pole) Link: http://faq.waldorfian.info/4-pole-inside.html [ Home ] 30.04.2024 03:54:33 Waldorf Time