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New member Username: KwinntonPost Number: 1 Registered: Nov-07 | I've got a BXi1206D hooked up to a Kicker l7 15" (RMS at 1000w). I've got the sub wired to 1-ohm and all connections properly set up. My problem is that, when running with no gain (level), I hardly get any sound out of the subwoofer. I can turn the gain all the way up and get a pretty loud response, but only then will that occur. Am I correct in thinking that the 1200w RMS of the amp should produce a fairly loud response out of the sub which RMS's at 1000, even with no gain settings? |
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Silver Member Username: Hurricanebr1anWestern Burbs of Chicago, IL Usa Post Number: 205 Registered: Sep-07 | First, dont turn the gain all the way for an extended (over 15 seconds) period of time. This is how subwoofers blow. Second, when the gain is turned all the way down, its like your volume knob when its all the way down, which would be no sound or 0. What gauge wiring do you run? |
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New member Username: KwinntonPost Number: 2 Registered: Nov-07 | I am running 4 AWG wire with 80A fuses inline and on the amp. I've been told many different things about the gain, and am kinda unsure of how its supposed to work. I may not have a problem with my subs, just an error in my education. Any light shed upon this would be terrific. |
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Gold Member Username: Nd4spd18Northwest PA Post Number: 3667 Registered: Jul-06 | Gain: http://www.subwoofertools.com/forum/setgain.asp |
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New member Username: KwinntonPost Number: 3 Registered: Nov-07 | Is there a frequency that works best for setting the gain? |
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Gold Member Username: Nd4spd18Northwest PA Post Number: 3669 Registered: Jul-06 | It doesn't make a difference as long as it's within the range that the sub will paly. (if different frequencies do make a difference, you're doing something wrong. Such as having loudness, EQ, bass boost, etc on.) Most people use 50 hz since that will always be in range of most subwoofer systems. |
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Gold Member Username: JuliobSanto DomingoDominican Re... Post Number: 5015 Registered: Dec-05 | lol OMG this thread is funny, man if the gain is at 0 you won't notice big bump, you need the gain setting tutorial from jl audio's homepage. |
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New member Username: KwinntonPost Number: 4 Registered: Nov-07 | I got a reply from Hifonics. I've got everything working now. That is not a GAIN control. It is a Level control. It is valued in signal voltage and used to match the Level in the amplifier to the signal voltage received from your headunit. Turned all the way to the left will yield little to no output. I would suggest making all of your desired crossover settings, keeping the bass boost at 11 o'clock, turning your headunit volume up until your mids and highs are at maxx clean output with no distortion, and then slowly turn your Level control to the right until you reach desired output or clipping. If clipping, distortion or protection is reached, you will need to turn the Level control back to the left a little bit until the issue does not exist. This should resolve your issues. |
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Gold Member Username: Nd4spd18Northwest PA Post Number: 3684 Registered: Jul-06 | Gain = level they mean the same thing And no bass boost |
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Gold Member Username: JuliobSanto DomingoDominican Re... Post Number: 5017 Registered: Dec-05 | that guy from hifonics sounded like a newbie, put the bass boost at 11 o clock lol OMG! i think he's gonna fry that amp. |
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New member Username: KwinntonPost Number: 5 Registered: Nov-07 | Alright. Following the instructions I have given I get my level (gain?) to about the "3 o'clock" position. This seems to provide a decent amount of bass but my concern is that it seems that I have it too far? The sub sounds fine, no clipping/distortion. Should an amp running at this power hooked up with a matching power hungry sub need to be set this way? If not, am I looking at a bad amp? Or am I doing something else wrong? |
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Gold Member Username: Nd4spd18Northwest PA Post Number: 3698 Registered: Jul-06 | Yeah you're doing it wrong........ I gave you a link to how to set the gain right already, use it. |
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New member Username: KwinntonPost Number: 6 Registered: Nov-07 | I went to the link and found the one from JL audio. My target voltage is 34.6. Am I correct in putting the probes where the speaker wire exits the amp? I get a voltage reading of 12, with spikes to 15. That' with the gain 3/4 of the way up, no EQ's and I'm running a 50hz tone. Any ideas? |
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Gold Member Username: JuliobSanto DomingoDominican Re... Post Number: 5019 Registered: Dec-05 | formula for target voltage is the Square root of final OHm resistance x Rms power |
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Gold Member Username: Nd4spd18Northwest PA Post Number: 3705 Registered: Jul-06 | Are all EQ, loudness, bassboost on the HU turned off? HU volume at 3/4 of max? Amp bass boost off? Is the test tone a 0db tone? HU sub level (if it has it) turned all the way up? Check all that, then start with the gain down, and turn it up until you get 34.6 on your meter. |
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New member Username: KwinntonPost Number: 7 Registered: Nov-07 | Are all EQ, loudness, bassboost on the HU turned off? yes HU volume at 3/4 of max? yes Amp bass boost off? yes Is the test tone a 0db tone? Not sure, where can I find a better tone? HU sub level (if it has it) turned all the way up? yes Am I correct in my placement of the probes? I can turn my gain all the way up and it won't get near 34.6.... |
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Gold Member Username: Nd4spd18Northwest PA Post Number: 3710 Registered: Jul-06 | Yes you have the probes in the right place. Did you disconnect the subs from the amp when doing this? Is your meter set to read AC volts? The symbol looks like this ~ The DC symbol looks like this ---- You can get a good test tone here: http://www.realmofexcursion.com/jmac/audio/0dB_wav_test_tones/50%20Hz.wav |
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Silver Member Username: •cam•Post Number: 992 Registered: Nov-06 | Yeah, I'll bet he had it on DC. Train of thought: Car = DC electrical system -----> set multimeter to measure DC V. |
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Silver Member Username: •cam•Post Number: 993 Registered: Nov-06 | Logical, though, without knowledge of sound waves. Have fun when you get it set right. |
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New member Username: KwinntonPost Number: 8 Registered: Nov-07 | Alright. I was able to get a 34.6V reading out of my amplified. I used the file provided, turned all EQ off, bass remote of amp unplugged. The level is turned almost to max to produce this output. I took some pictures to demonstrate my settings. Is this correct? Hope the pictures work out okay. The amp is chrome around these settings so I wrote over them in photoshop so you can read them. http://i111.photobucket.com/albums/n151/kwinnton/IMG00065copy.jpg http://i111.photobucket.com/albums/n151/kwinnton/IMG00064copy.jpg |
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Gold Member Username: Nd4spd18Northwest PA Post Number: 3717 Registered: Jul-06 | The knobs you labeled "bass EQ" and "Phase" need to be at 0. BTW leave that bass remote unplugged after you're done with all this, bass boost = clipping = bad. |
