Members bjm362 Posted October 10, 2016 Members Share Posted October 10, 2016 I believe the use of the term was from the route of the word. A 40hz "Null" filter nullified anything below 40hz. So, trying to move this to a more positive note....What mixers did you design? Link to comment Share on other sites More sharing options...
Members agedhorse Posted October 11, 2016 Members Share Posted October 11, 2016 Some early DMI-Crest Audio mixers, some semi-custom high dollar matrix mixers (for monitor systems) and later some large powered mixers for Genz Benz, along with consulting engineering work for Yamaha. Also, quite a few "channel strip" stand alone products for a variety of manufacturers. A null filter is a band reject filter (dip filter), where there is a null in the response. It's still not a high pass filter (which is a shelving filter). Man, you are really stretching the definition, which isn't going to happen because Peavey made up that term as it applied to the filter. They haven't done it since either. Heck, it could have been a typo or a marketing department misapplication but it sure didn't have any engineering basis (and I was working in this engineering field at that time). Link to comment Share on other sites More sharing options...
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