TimW
Major Contributor
Sorry if this has been covered in a tutorial already but I have not been able to find much information on it. I'm trying to integrate a subwoofer into a 2.1 system. I can apply delay to the main speakers to compensate for the delay of the subwoofer caused by DSP and added distance. To find the necessary delay I attempted to follow this guide using REW and a umik-1. I followed the directions and got the first measurement of the left speaker as my acoustic timing reference. Then I set the output to the right speaker and attempted to measure my subwoofer. The problem is that the chirp REW plays before the frequency response measurement is well... a high pitch chirp. My subwoofer, even with the low pass filter disabled, does not play the chirp at sufficient volume. REW gives me a message that says something like system delay could not be measured. And of course it can't if it's asking the subwoofer to play high frequency chirps. I set the sub and preamp to max volume and still could not get REW to recognize the quiet chirp. What am I doing wrong? How do other people do this? Is there a way to change the acoustic timing reference to a lower frequency that the subwoofer can actually play?
For reference my sub is powered by the Dayton Audio SPA250DSP amp which is performing all of the DSP. Source is an SMSL Sanskrit 10th taking an optical signal from a TV.
For reference my sub is powered by the Dayton Audio SPA250DSP amp which is performing all of the DSP. Source is an SMSL Sanskrit 10th taking an optical signal from a TV.