i just wanted to add in that when i first built my stereo for my fj that i tried using a Stinger brand signal adjustable line out converter for my Sub amp and no matter what i did the bass coming out was horrible and very weak. not to mention my fjammer would clip at higher volumes. when i would crank up either the converters settings or my amp i just wasn't getting a decent sound or strong signal. with the bass settings cranked up just to get it to pound harder you could tell the signal was just to weak.
i was using a RF BD 500 amp and 2 ten inch JL audio w3's that i took directly out of my old trailblazer that were hooked up to the stock Bose deck and it shook the whole truck including my eyeballs so i wasn't impressed with the signal quality of the fjammer at all. ended up going with a poineer deck with 5 volt pre outs and wow. shaking my eyes again. :rocker: not to mentien that i have to keep my amp at 1/4 volume because the 5 volt pre outs are so strong there is basicly no distortion and really deep bass.
It really is to bad the fjammer isn't that great because i do think it's a fantastic looking headunit.
I understand fully what your talking about....the hook up and equipment you mentioned is problematic at best and would be subject to distortion due to the signal you were working with. Taking a high out put signal off an amplifer (the FJammer has a very weak amplifier to say the least) and then amplifying it again is not always going to provide clean clear sound field....(LOUD?....YES!....QUALITY??)....although there are many people who choose to do it, simply because it is an easy way to accomplish their objective....LOUDER SOUND.
I found out many years ago that working with an audio signal from a pre-amplifier, provides a cleaner and more stable signal....(NOTE: as long as you adjust your amplifiers correctly, the only clipping you should experience is after you've exceeded the threshold of the amplifier....not the pre-amp out signal). But I will say that in no way does the FJammer approaches 5 volt pre-amp output (NOTE:This is a relatively new approach by manufacturers to boost their signal for those wishing to obtain significant eye bleeding, ear drum mashing, brain numbing bass passage out put). But I also know from my audio experience that a properly designed audio system pushing 15 to 25 watts can kick butt and in most cases (the design of the speakers playing a key role....efficiency, etc.)....especially if it has a stable signal....some of the most high end audio equipment out there today don't increase their pre-amp signal as much as they work to design extremely stable amplifier transformers and circuitry...in fact some manufactures have created stable signals capable of crossing your speaker leads ("+" and "-") and the system will not be damaged or self destruct! I haven't taken the time to measure the FJammer pre-amp signal strength, but given what I have experienced with the stock lay out of the factory system I'm 99% sure that the pre-amp signal is very stable and will provide a quality signal to the amplifiers I'll be running.
My plan was never to enter a "SOUND OFF" competition, as much as it was to alert others that there was an alternative to buying an after market deck. I'm not a big poster either here or at the SO CAL FJ-owners site....but I have seen quit a few people express there appreciation for the FJammer. Like them at low volumes (for me) it is an acceptable system....but if you want to boggy down the road at a louder volume (I'm just looking to have bass sufficient to impress inside the vehicle...not all the people with in 6 city block area).
Hope enough is said here to qualify putting this issue to rest. For those of you desiring to argue this further I'll only say...."TO EACH HIS OWN"....personal preference is just that....each person likes what they like for different reasons. So my effort to post here was to bring to those who like the some of the same things I do....an alternative....if you don't that's fine too.:wave: