This topic came up in an Audio Processing thread. This thread will be a continuation of the topic, as a sticky thread in a more appropriate forum, to cover the following: A list of speaker companies who specify off-axis frequency response for their speakers. This "master list" will be updated...

As promised I am calibrating 2 ananlog and 2 digital RS SPL meters. This by no means a professional calibration but it will be better than nothing at all and give us some clues as to what we need do with correction values. These will be calibrated against my professionally calibrated Behringer...