gr8handogoatness Posted December 10, 2013 Report Share Posted December 10, 2013 I have a pioneer avh-p2400bt and I have never really had very good deep bass. I always assumed it was just the crappy sub and box I had. I finally saved up for a couple of DAD 10s and overall sound increased (loudness and quality) but I still lack that deep bass. When I got out the o-scope to set the gains and crossovers I noticed that low frequencies had significantly less amplitude than say 80hz. As I swept through the frequencies I noticed that high frequencies also changed just not as extreme. Anyone ever seen this? I just installed a cheap Kenwood in my brothers truck and out of curiosity checked the response, perfectly linear. So my question is why? I have looked through the settings but don't see any reason for it. Link to comment Share on other sites More sharing options...
Pro7 Posted December 10, 2013 Report Share Posted December 10, 2013 that's what eq's do. So it has to either be that or you have the high pass filter on, on the hu I've gotten a blowjob and picked up my iphone behind her back to see what email notification I got from smd before Link to comment Share on other sites More sharing options...
gr8handogoatness Posted December 10, 2013 Author Report Share Posted December 10, 2013 Thats what I was thinking too so I made sure eq was flat and the high pass was off which it all was, so I checked the sub channel thinking that maybe there was a permanent filter in the HU but the sub channel was also goofy. Had the same roll off under like 60hz or something. I even checked the signal from my phone (input device) and all was linear. You think there is maybe a setting that I'm missing or do pioneer head units just suck? I'm measuring the signal from the rca straight from the back of the head unit so I know its not the amp or the input to the deck, so it has to be the deck. Link to comment Share on other sites More sharing options...
smashedz28 Posted December 10, 2013 Report Share Posted December 10, 2013 Should probably share info on your install. Not sure about those 10's. Install may have a lot to do with it. What kind of vehicle. Size enclosure, power? Link to comment Share on other sites More sharing options...
gr8handogoatness Posted December 10, 2013 Author Report Share Posted December 10, 2013 09 Camry with 2 DAD amh 10s in a 1.75 ish ft^3 sealed enclosure (stuffed with polyfil), Sundown sa 6.5cs front stage all off an Arc Audio 4200se. Gains set with o-scope. I don't know what else I can say that would be helpful. Link to comment Share on other sites More sharing options...
Pro7 Posted December 10, 2013 Report Share Posted December 10, 2013 Well sealed doesn't exactly help the bottom roll off.. But where did you measure to see that it was cutting off the lower freqs? You should test the rcas. If you tested the speaker wires out of the amp check your subsonic filter Oh and next time don't post in the website technical problems section. This should probably be in the head unit section if you think that's the problem I've gotten a blowjob and picked up my iphone behind her back to see what email notification I got from smd before Link to comment Share on other sites More sharing options...
gr8handogoatness Posted December 10, 2013 Author Report Share Posted December 10, 2013 Thanks, I will remember that(I'm new as you can probably tell, to the site not to audio). And yes I measure from the rcas. I know sealed isn't going to be anything crazy, but still the signal from the head unit is rolling off so they really won't play low. Link to comment Share on other sites More sharing options...
Krakin Posted December 10, 2013 Report Share Posted December 10, 2013 Some piece of your equipment might have some kind of "protection" that is sending a slight passive high pass. Krakin's Home Dipole Project http://www.stevemeadedesigns.com/board/topic/186153-krakins-dipole-project-new-reciever-in-rockford-science/#entry2772370 Krakin, are you some sort of mad scientist? I would have replied earlier, but I was measuring the output of my amp with a yardstick . . . What you hear is not the air pressure variation in itself but what has drawn your attention in the two streams of superimposed air pressure variations at your eardrums An acoustic event has dimensions of Time, Tone, Loudness and Space Everyone learns to render the 3-dimensional localization of sound based on the individual shape of their ears, thus no formula can achieve a definite effect for every listener. Link to comment Share on other sites More sharing options...
Pro7 Posted December 10, 2013 Report Share Posted December 10, 2013 Dbl post I've gotten a blowjob and picked up my iphone behind her back to see what email notification I got from smd before Link to comment Share on other sites More sharing options...
Pro7 Posted December 10, 2013 Report Share Posted December 10, 2013 If your sub level isnt all the way up that could be it too Sub level on the headunit obviously. NOT the gain on the amp I've gotten a blowjob and picked up my iphone behind her back to see what email notification I got from smd before Link to comment Share on other sites More sharing options...
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