djunified Posted May 23, 2012 Report Share Posted May 23, 2012 Hello all, I am currently in the process of revamping my system. I attempted to do it last summer when i knew nothing about car audio, and it did sound quite decent. I now realize that there is alot more potential. As of now, there are JBL Grand Touring 5x7's up front and in the rear. In the trunk is a Pioneer 12" sub. The powerplant behind the whole deal is a 1200w Crunch amp, which gets the job done quite well. My problem with the system is the bass coming from the speakers. The only way i can get the speakers to sound well at high volumes is setting the HPF to the lowest setting, which on the amp is 60 hz. If i set the crossover to Full, the speakers sound good until about half volume. After that it is complete garbage. The "bottoming out" just kill the sound if you know what i mean. And for any of you who have the thought in their head, I have in fact set my gains properly with my trusty oscilloscope. I know speakers are capable of reproducing crisp and clear mids, because my friend has a 2011 Lancer with the oem RF system. When a song with good mids is played, your legs get a massage I believe he has 6.5 Punch components up front, and 6.5 coaxials in the rear. Its all stock, but Rockford Fosgate made the speakers. Now i can get to my question after describing my situation. My car is a '99 Sable, and it has the abnormal 5x7 speaker size. I plan to get some 5x7/6x8 to 6.5 adapters so i can throw a decent set of components up front. I know nothing about manufacturers and their reputation in terms of sound reproduction. Based on what some of you have experienced, what would your recommendation be for me? I think JBL doesn't have good bass reproduction. Thanks in advance. Quote Link to comment Share on other sites More sharing options...
Mikey Bates Posted May 23, 2012 Report Share Posted May 23, 2012 His speakers have nothing to do with yours. At all. . . not even comparable. . . . whats powering what. the stock HU powering the speakers and the mono crunch amp powering the pioneer? Quote Link to comment Share on other sites More sharing options...
djunified Posted May 23, 2012 Author Report Share Posted May 23, 2012 (edited) The 1200w crunch is a 4-channel amp producing about 500w rms total. The rear channels are bridged at 4 ohms producing about 200-250w rms. The front channels are set up to run 4 speakers, so each speaker should be getting around 55w rms each if wired at 2 ohms. The stock headunit is indeed installed, but I have achieved an RCA output by tapping into the circuitry within one of the control boxes. Edited May 23, 2012 by djunified Quote Link to comment Share on other sites More sharing options...
deathcards Posted May 23, 2012 Report Share Posted May 23, 2012 (edited) his car and speakers are different than your sable with jbls just like said above get a separate amp for the sub will help with sound quality most speakers are not meant for much under 60-80hz are these your speakers if they are they don't like anything under 50hz http://www.wooferset...ent-system.aspx can you give me a model number of you speakers so i know what i am looking for please Edited May 23, 2012 by deathcards Quote skar sk2500.1 0 gauge power and ground kunukonceptz alpine HUvxi65 components on BA gt-275new build log -> http://www.stevemeadedesigns.com/board/topic/150642-project-d-kon-deathcards-build-log/#entry2148821 2 x-15 sundowns singer alt, odyssey bat, and maxwell ultra caps Link to comment Share on other sites More sharing options...
djunified Posted May 23, 2012 Author Report Share Posted May 23, 2012 Yeah those are my speakers, the GTO8628 but mine are the coaxial version rather than the component set. Quote Link to comment Share on other sites More sharing options...
deathcards Posted May 23, 2012 Report Share Posted May 23, 2012 (edited) Yeah those are my speakers, the GTO8628 but mine are the coaxial version rather than the component set. k i found those too they are the same don't like much under 50hzedit spelling error my typing is getting terrible excess and random letters and lately i have been getting distracted easily Edited May 23, 2012 by deathcards Quote skar sk2500.1 0 gauge power and ground kunukonceptz alpine HUvxi65 components on BA gt-275new build log -> http://www.stevemeadedesigns.com/board/topic/150642-project-d-kon-deathcards-build-log/#entry2148821 2 x-15 sundowns singer alt, odyssey bat, and maxwell ultra caps Link to comment Share on other sites More sharing options...
Mikey Bates Posted May 23, 2012 Report Share Posted May 23, 2012 like get a mono amp. for best results. . . . but usually you can set the front and rear filters seperatly. . . so set the front at 60 like you said. and the rear to like idk 80 for lpf and that should do it yeah? whats the problem here. sorry if im just not understanding Quote Link to comment Share on other sites More sharing options...
deathcards Posted May 23, 2012 Report Share Posted May 23, 2012 (edited) like get a mono amp. for best results. . . . but usually you can set the front and rear filters seperatly. . . so set the front at 60 like you said. and the rear to like idk 80 for lpf and that should do it yeah? whats the problem here. sorry if im just not understanding mainly the speakers aren't built to handle the lows which gives you the bottoming outthe sub is meant for the bass not the speakers and the crossovers sound about right find a happy medium for the sub lpf so it sorta evens out with the speakers srry i was blunt i am terrible at explaining things :/ also make sure you don't go below the speaker crossover otherwise you may be missing a few notes Edited May 23, 2012 by deathcards Quote skar sk2500.1 0 gauge power and ground kunukonceptz alpine HUvxi65 components on BA gt-275new build log -> http://www.stevemeadedesigns.com/board/topic/150642-project-d-kon-deathcards-build-log/#entry2148821 2 x-15 sundowns singer alt, odyssey bat, and maxwell ultra caps Link to comment Share on other sites More sharing options...
djunified Posted May 23, 2012 Author Report Share Posted May 23, 2012 Thank you everybody I will probably get another amp dedicated to just the speakers. Quote Link to comment Share on other sites More sharing options...
Guest Posted May 23, 2012 Report Share Posted May 23, 2012 use an LPF of around 80-100. bottoming out problem solved. its a filter problem. Quote Link to comment Share on other sites More sharing options...
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