CJ18 Posted September 16, 2011 Report Share Posted September 16, 2011 When I am setting my sub amp I turned the crossovers on the amp all the way up/down like the instructions say. When i set the gain I get 97v of undistorted power. When I reset my lpf and hpf on my amp the output voltage drops down to about 80v and I have to reset the gain again after setting my filters. Is this correct or am I doing something wrong? Quote Link to comment Share on other sites More sharing options...
TonyD'Amore Posted September 16, 2011 Report Share Posted September 16, 2011 When I am setting my sub amp I turned the crossovers on the amp all the way up/down like the instructions say. When i set the gain I get 97v of undistorted power. When I reset my lpf and hpf on my amp the output voltage drops down to about 80v and I have to reset the gain again after setting my filters. Is this correct or am I doing something wrong? What frequency are you setting these filters at? Quote Link to comment Share on other sites More sharing options...
CJ18 Posted September 16, 2011 Author Report Share Posted September 16, 2011 The first time turned both crossovers all the way up/down 10hz/250hz. I then turned them back up to my usual settings of 30hz/75hz. When I reset the crossovers my power output dropped to about 80v from 97v. Quote Link to comment Share on other sites More sharing options...
TonyD'Amore Posted September 16, 2011 Report Share Posted September 16, 2011 The first time turned both crossovers all the way up/down 10hz/250hz. I then turned them back up to my usual settings of 30hz/75hz. When I reset the crossovers my power output dropped to about 80v from 97v. That 30Hz infrasonic filter is probably reducing your output at 40Hz by a little bit. The difference between 97V and 80V isn't much though. 20* Log(97V) - 20* Log(80V) = (39.74 - 38.06) = 1.68dB. So if you are setting with the 10dB overlap track you are ending up with 8.32dB of overlap instead. As you can see it's not really a problem. If you would like those 1.68dB of overlap back you could readjust with your filters set where you are going to have them. The thing is though, all of this has already been considered when we designed it. As you are setting the gains with no load on the amplifier, this will build in an extra 1 - 2 dB of overlap. So it will all work out in the end just by using the procedure in the instructions. Hope this helps Tony Quote Link to comment Share on other sites More sharing options...
CJ18 Posted September 17, 2011 Author Report Share Posted September 17, 2011 I just realized that I have been using the 0db track when I am tuning the amp. I will re do it tomorrow using each of the -5, -10, and -15 db tracks and that should fix my issues. Thanks Tony I appreciate the prompt response and a great explanation. Quote Link to comment Share on other sites More sharing options...
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