Got a pair of omega subs to replace a MJ Acoustics 50 mkii(which is up for sale) and was looking to calibrate them when I came across this subwoofer calibration article and thought it will be useful to share.(yet to try it though and will report on its success or otherwise)
How to set up your subwoofer: our expert guide to room placement and controls
Make sure you get all the performance you paid for
www.avhub.com.au