jon1178 Posted December 25, 2012 Report Share Posted December 25, 2012 I just installed the pioneer avph4400dvd head unit and finally got everything working but sound quality sucks. My stock head unit sounded much better. Is it possible that the new head unit is over powering the stock bose speakers? With the stock head unit I could max the volume with no distortion now with the pioneer unit it sounds. like crap with the volume maxed. I have infinitely adjusted the equalizer it still. sound awful. Any help would be appreciated. Quote Link to comment Share on other sites More sharing options...
cb2big4u Posted December 26, 2012 Report Share Posted December 26, 2012 Well its deff not the head unit powering the speakers. My understanding is the bose system has an amp so that will be adjusting the volume of your speakers. What kind of harness did you use? The basic GMOS-04? Another question is...when you max the volume of your new head unit is it louder than the stock one? or is it still less volume coming out with distortion also? Quote Link to comment Share on other sites More sharing options...
cb2big4u Posted December 26, 2012 Report Share Posted December 26, 2012 (edited) Found this reading through the GMOS-04 Install manual. Looks like something that you might need to do. http://www.metraonli...GMOS-04_web.pdf 1) Start your vehicle and turn on the radio having audio playing. 2) Turn your aftermarket radio’s volume up ¾ of the way. 3) With a small screwdriver adjust the potentiometer clockwise to raise the audio level and counterclockwise to lower the audio level. 4) Once at desired level your audio adjustment is complete. Edited December 26, 2012 by TampaVmax (see edit history) Quote Link to comment Share on other sites More sharing options...
jon1178 Posted December 26, 2012 Author Report Share Posted December 26, 2012 I must have overlooked that adjustment when doing the install. Yes it has less volume with more distortion. Quote Link to comment Share on other sites More sharing options...
cb2big4u Posted December 26, 2012 Report Share Posted December 26, 2012 (edited) I must have overlooked that adjustment when doing the install. Yes it has less volume with more distortion. I would deff look and see if that would help it out. I think what that adjustment is doing is adjusting the "amped" volume of the head unit before it gets to the bose and gets "amped" again. I have seen this cause quite a bit of distortion at times from car audio, home theaters, to using a PC on TVs. Give it a try and get back. Just noticed your from Tampa also. LOL Edited December 26, 2012 by TampaVmax (see edit history) Quote Link to comment Share on other sites More sharing options...
jon1178 Posted December 26, 2012 Author Report Share Posted December 26, 2012 I only have to work a couple hours tomorrow so when I get home I will try that and post if it helped or not. Quote Link to comment Share on other sites More sharing options...
Blown 346 Posted December 26, 2012 Report Share Posted December 26, 2012 You will also have to re adjust all the settings to your speakers so you dont blow them. You will have to fine tune the radio's bass and treble levels, Hertz levels to get the nice clean crisp sound. Quote Link to comment Share on other sites More sharing options...
cb2big4u Posted December 26, 2012 Report Share Posted December 26, 2012 Just whatever you do. Don't use the stupid loudness function. It's like cranking your eq up to the max like a smiley face. Sent from my ADR6425LVW using Tapatalk 2 Quote Link to comment Share on other sites More sharing options...
cb2big4u Posted December 29, 2012 Report Share Posted December 29, 2012 Ever figure this out? Did the little gain knob help? Sent from my ADR6425LVW using Tapatalk 2 Quote Link to comment Share on other sites More sharing options...
jon1178 Posted December 29, 2012 Author Report Share Posted December 29, 2012 Thanks that was it I must have overlooked that on my install. Now I am fighting with the steering wheel controls. I got everything wired up and programming it is becoming a PIA. stereo just keeps going to the max volume setting by itself. Quote Link to comment Share on other sites More sharing options...
jon1178 Posted December 29, 2012 Author Report Share Posted December 29, 2012 TampaVmax thanks for the help got everything programmed the way I want it and the system sounds great. If I would have known this would make my JL sub sound this good I would done it a long time ago. Quote Link to comment Share on other sites More sharing options...
cb2big4u Posted December 29, 2012 Report Share Posted December 29, 2012 Np glad to help. Sent from my ADR6425LVW using Tapatalk 2 Quote Link to comment Share on other sites More sharing options...
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