Tuning JL 1000/1 for Fi BL 15 all options.

[raolito1980 2]

Hello everyone. Had questions about how to tune my amplifier. I dont want to start slammin the BL and have it go out on me. Let me say first I have done my Big 3. Running 1gauge to rear battery. 4 gauge to amps. I have a good idea on how to set my amp gains. I read the HOW-TO here on the forum. What I need is how to tune this knobs on my JL AUDIO amp that I havent a clue what they are. First would be my infrasonic frequency(hz) knob. It goes from 15 to 60HZ. Also there is a on and off switch for that. Second, there is a Parametric EQ setting marked "Q". This setting can be tuned from 0.5-4.3. I belive its the bandwidth control. Anybody know for sure? What should I set my Low Pass Filter to? this is a knob that goes from 40Hz-200Hz? I will be using a remote bass knob for this amp. Anything I forgot please let me know. I listen to mostly rap hiphop and spanish music. My enclosure is built at 3.5 cu. ft. and tuned to 33 hz.. My Fi BL 15 is the Dual 1 ohm wired to 2 ohms. And the amplifier is a JL Audio 1000/1. 1000rms.

[emh9009 199]

i do know that the low pass filter should be around 80-100...

[Duran 387]

I'd run the low pass at about 60 Hz, depending on how your capable your midbass or midrange is. The subsonic should be set 3-5 Hz. below tuning.

[emh9009 199]

so the infrasonic filter he is talking about is the same as subsonic? just a different name? what about the parametric?

[raolito1980 2]

I'd run the low pass at about 60 Hz, depending on how your capable your midbass or midrange is. The subsonic should be set 3-5 Hz. below tuning.

So the infrasonic is the same as subsonic? These names are confusing to me. Thanks i will set the low pass around there and see how my ears like it! Thanks.

[Duran 387]

I'd run the low pass at about 60 Hz, depending on how your capable your midbass or midrange is. The subsonic should be set 3-5 Hz. below tuning.

So the infrasonic is the same as subsonic? These names are confusing to me. Thanks i will set the low pass around there and see how my ears like it! Thanks.

Correct.

[KU40 173]

Leave the EQ alone. You are correct that the knob effects the width of the curve of frequencies adjusted by the bass boost. But since it is a bass boost, leave that knob all the way down. Then where you have the EQ set doesn't matter because you aren't using it anyway.

[raolito1980 2]

I didnt want to start another thread so here i go again since it pertains to this one. Okay after some tweaks with not too much success to my ears. I did the DMM setting/tuning. Well i have a concern that when i did do it i barely reached halfway of the gain on my amp that i got my required voltage reading, which is 44.7v this i got through 2ohms x 1000rms=2000 watts, and the square root of that.. I know the sub can hit harder then on half gain turned up. I have questions about the Q setting. This knob setting goes 0.5- 4.3. Can anyone elaborate on how i can properly set this setting. I read the manual but i feel its pertaining to the 12W7 that i had hooked up to it. Technical words confuse me. If anyone can tell me how to post pics please let me know. I tried but it dont let me.

Edited February 23, 2010 by raolito

[emh9009 199]

to get pic. on here you need to upload them to an online photo sharing account then post the here. i use imageshack.com, but there are a lot of them out there.

[Impious 1,476]

I did the DMM setting/tuning. Well i have a concern that when i did do it i barely reached halfway of the gain on my amp that i got my required voltage reading... I know the sub can hit harder then on half gain turned up.

Keep in mind the gain is not a "power knob".....having it turned up less than half way does not mean you are not receiving full power output. It is possible to obtain full power output from an amplifier with the gain turned to it's lowest setting, depending on the input voltage from the source.

That said, there are different theories on how to properly set the gain with a DMM. One theory is to use a 0db test tone so that the amplifier doesn't clip the signal. However, this decreases the amount of power output during typical music playback since music is at a level below 0db way more often than it is at 0db. So another theory is to use attenuated test tones; -3db, -6db, -10db. This gives you more power output while playing music at the risk of clipping the peaks of the signal.

But before we really get into resetting the gain, it would be more useful to know what enclosure you were using, what your other settings were set at (lowpass filter, highpass or infrasonic filter, bass boost, Q, etc), and what exactly you think is lacking as well as your expectations. We may end up chasing our tail around proper gain setting when the problem is actually somewhere else.

I have questions about the Q setting. This knob setting goes 0.5- 4.3. Can anyone elaborate on how i can properly set this setting.

When you use a bass boost or EQ where you increase or decrease the level of the signal at a particular frequency, you are not only adjusting the frequency marked on the dial. You will also be increasing or decreasing the level of the frequencies surrounding (both above and below) the center frequency. For example, if you set the EQ center frequency to 40hz, and you turn the db dial to +3db, you are not only increasing 40hz by 3db....you are also increasing the output level of frequencies above and below 40hz (by an amount less than 3db, however). The Q setting changes the "bandwidth", or how wide of a frequency range above and below 40hz you are affecting. The lower the Q, the wider the range of frequencies. The higher the Q, the narrower the range of frequencies. Unfortunately without quite a bit of information it's hard to determine a "proper" setting of the Q....so generally it's best to set it to where ever obtains the best results by ear.

[raolito1980 2]

I did the DMM setting/tuning. Well i have a concern that when i did do it i barely reached halfway of the gain on my amp that i got my required voltage reading... I know the sub can hit harder then on half gain turned up.

Keep in mind the gain is not a "power knob".....having it turned up less than half way does not mean you are not receiving full power output. It is possible to obtain full power output from an amplifier with the gain turned to it's lowest setting, depending on the input voltage from the source.

That said, there are different theories on how to properly set the gain with a DMM. One theory is to use a 0db test tone so that the amplifier doesn't clip the signal. However, this decreases the amount of power output during typical music playback since music is at a level below 0db way more often than it is at 0db. So another theory is to use attenuated test tones; -3db, -6db, -10db. This gives you more power output while playing music at the risk of clipping the peaks of the signal.

But before we really get into resetting the gain, it would be more useful to know what enclosure you were using, what your other settings were set at (lowpass filter, highpass or infrasonic filter, bass boost, Q, etc), and what exactly you think is lacking as well as your expectations. We may end up chasing our tail around proper gain setting when the problem is actually somewhere else.

I have questions about the Q setting. This knob setting goes 0.5- 4.3. Can anyone elaborate on how i can properly set this setting.

When you use a bass boost or EQ where you increase or decrease the level of the signal at a particular frequency, you are not only adjusting the frequency marked on the dial. You will also be increasing or decreasing the level of the frequencies surrounding (both above and below) the center frequency. For example, if you set the EQ center frequency to 40hz, and you turn the db dial to +3db, you are not only increasing 40hz by 3db....you are also increasing the output level of frequencies above and below 40hz (by an amount less than 3db, however). The Q setting changes the "bandwidth", or how wide of a frequency range above and below 40hz you are affecting. The lower the Q, the wider the range of frequencies. The higher the Q, the narrower the range of frequencies. Unfortunately without quite a bit of information it's hard to determine a "proper" setting of the Q....so generally it's best to set it to where ever obtains the best results by ear.

I have a ported enclosure 3.5 cu. ft., tuned to 33 hz.. My amp settings are as follow. Infrasonic filter at 30. Parametric Equalizer= "Q" setting is at 1.1, Center frequency is at 35, Boost 0 (turned down). Amp LP FIlter Mode/Slope is at 12db and filter frequency is set at 85hz. I used a 50hz test tone to do my test/tuning. Well what I feel is lacking is that with the gain turned halfway up I'm not getting as much power to the sub therefore not loud enough unless I turn it up more then what I had to before with my W7. My bass EQ switch is in the on position.

[raolito1980 2]

Imageshack - 20100222190519.jpg

this are the settings. Lets see if this works.

[raolito1980 2]

[Impious 1,476]

Does your headunit have any adjustments? EQ, crossovers (both lowpass and subsonic/infrasonic/highpass), level settings, etc?