Depending on the subwoofer system and the vehicle, different slopes may be required to produce a smooth transition to the mid-bass speakers in the system. Experiment to find the slope which best matches the acoustic requirements of your system.
Hint: A trunk mounted sub whose output has to "fight" through a rear deck or a back seat often benefits from the 12 dB/octave slope which lets more upper bass content pass through. A sub that fires directly into the listening environment is more likely to benefit from a 24 dB/octave slope.
The above hint is not “set-in-stone”... You should always listen to the system carefully to determine the best choice as vehicle acoustics and other factors play a big role in choosing the most appropriate filter slope.
That's from your manual for the amp. I would leave bass boost off, don't mess with it yet and usually you never need to.
As for LP filter, match that to what you set your head unit to. I would put it at 80 hz on the amp and the head unit and see if you like how that sounds.
On JL's site there is a tutorial for your Parametric EQ ('Q', Bass Boost, Center Freq.) that explains in detail what it does and has a nice graph showing you the frequency band according to the 3 variables that shows the end result (seeing this graph and messing with it will help you understand what the Parametric EQ is).
I feel that the Input Sensitivity settings are the most important, I suggest to you downloading the .pdf of the 1000/1v2's manual and reading it. I am currently having trouble with mine when i turn on the bass boost; I feel this is because of the input sens. being wrong. I'm taking it to a professional seeing as how im rookie with this high end stuff. I've had mine for 2 weeks
Hint: A trunk mounted sub whose output has to "fight" through a rear deck or a back seat often benefits from the 12 dB/octave slope which lets more upper bass content pass through. A sub that fires directly into the listening environment is more likely to benefit from a 24 dB/octave slope.
The above hint is not “set-in-stone”... You should always listen to the system carefully to determine the best choice as vehicle acoustics and other factors play a big role in choosing the most appropriate filter slope.
That's from your manual for the amp. I would leave bass boost off, don't mess with it yet and usually you never need to.
As for LP filter, match that to what you set your head unit to. I would put it at 80 hz on the amp and the head unit and see if you like how that sounds.
On JL's site there is a tutorial for your Parametric EQ ('Q', Bass Boost, Center Freq.) that explains in detail what it does and has a nice graph showing you the frequency band according to the 3 variables that shows the end result (seeing this graph and messing with it will help you understand what the Parametric EQ is).
I feel that the Input Sensitivity settings are the most important, I suggest to you downloading the .pdf of the 1000/1v2's manual and reading it. I am currently having trouble with mine when i turn on the bass boost; I feel this is because of the input sens. being wrong. I'm taking it to a professional seeing as how im rookie with this high end stuff. I've had mine for 2 weeks
Oh yeah with Infrasonic filter, you only want that on if its a ported box which I'm guessing you don't have. So leave that off
- Thread Starter
- #4
Thanks so much, i've read and seen all those tutorials but I don't know where the centre freq should be so ok i'll turn off bass boost and the infrasonic freq. LP filter to 80. i've got it in a hatchback so i'm assuming a 24 slope would be better, yeah i need a voltmeter to set my input sensitivity thing is the w3v3's are around 300 rms so i need to know exactly where to put it, yeah i'm a rookie too. But i think taking it to a professional will help, just around here they'll charge me for their time! tuning is key, any idea about the centre freq?
Id leave ur center at 45 unless u find a different spot where you like the sound better, I have mine halfway between 35 and 45
Remember anytime u mess with your parametric your listening for unwanted distortions, try to turn it up to that point your comfortable with. If your input sensitivity(gain) is too high and you turn on the boost, you'll get alot of distortion
Remember anytime u mess with your parametric your listening for unwanted distortions, try to turn it up to that point your comfortable with. If your input sensitivity(gain) is too high and you turn on the boost, you'll get alot of distortion
- Thread Starter
- #6
i'm so confused now how can i have a lpf of 80 and a centre of 45? doesn't lpf cut out anything below 80?
Remember that all 3 knobs go hand in hand. Your center is what frequency will receive the most impact from the boost option. Q determines the frequency bandwidth extending it to all frequencies and not just the center.
Remember that all 3 knobs go hand in hand. Your center is what frequency will receive the most impact from the boost option. Q determines the frequency bandwidth extending it to all frequencies and not just the center frequency.
- Thread Starter
- #9
The lp filter cuts out notes below it though doesn't it?
It's playing EVERYTHING below 80 hz with everything above going to your normal speakers. Your center frequency determine at what point your bass boost gives the most added oomph , study the graph that is presented to you in the tutorial to help you better understand what center frequency is changing. This setting does not affect your LP frequency
Think of your low pass as what part of the music it is to play ( the low end) and the parametric controls as what part to further boost for sound pleasure.
Think of your low pass as what part of the music it is to play ( the low end) and the parametric controls as what part to further boost for sound pleasure.
- Thread Starter
- #11
Ah thank you! I thought for so long a low pass filter cuts out what you don't want so its been so low like 40 hz. But then the highpass filter on my head unit already cuts out the frequencies i don't want at my car speakers so does that mean the lpf on the amp is doing nothing for me really?
Bassin Buick
Banned
dude , don't use the boost at all. just kick that sucker to 24/db slope , set your LPF around 80hz and turn your gain all the way down , turn your deck up about 3/4 of the way , and slowly turn up the gain on the amp until your sub starts to sound like **** , then back it down till it sounds good. boost usually adds distortion and you don't want that. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
thevic24
5,000+ posts
my silence is deadly...
JL Audio - Car Audio Systems JL Audio - Car Audio Systems http://mobile.jlaudio.com/pdfs/13431.pdf Here is a link to some adjustments and the owners manual. They will help you with a starting point and then you can fine tune from there.
- Thread Starter
- #14
I've seen these all but I never knew how important the input sensitivity was i need to get my hands on an ac voltmeter now but thanks for all the help, i only bought the amp because i got it cheap didn't realise how many settings there actually were and how much difference it makes!
thevic24
5,000+ posts
my silence is deadly...
I guess you could say that is all part of the fun.
Good luck and enjoy.
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