Installation problems with SX900.2
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New member Username: TheforgottenmanPost Number: 2 Registered: Aug-06 | Hey guys, I installed a Kicker SX900.2 Amp to 2 JLW6v2_D4 12". For some reason it doesn't pound as hard as it is supposed to. Can someone help me fix this problem to make it work? Like am I supposed to change the settings on the digital to something specific? The amp powers the subs up but it isn't strong and its weak... so question is how do you fix it to make it sound louder and harder? Thanks |
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Gold Member Username: IlluminatorUSA Post Number: 4435 Registered: Apr-05 | Did you adjust the gain? What are the head unit settings like? How did you wire the subs? |
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New member Username: TheforgottenmanPost Number: 4 Registered: Aug-06 | Yeah I adjusted the gain to 0(it said to put it to zero). My head unit is an ALPINE 9815 so I maxed out the Sub-W to 15+(Already MAX) and it isn't even supposed to be that soft. The way I wired the sub is that I followed the instructions(typical like any other amp). Connecting the RCA, Power, Ground, remote, +/-, and etc. And I still can't get it to bump as loud... it has a digital setting on the SX900.2 |
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Gold Member Username: IlluminatorUSA Post Number: 4436 Registered: Apr-05 | The gain shouldn't be set to zero...it needs to be set to match the output voltage of the RCA pre outs on the head unit.  |
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New member Username: TheforgottenmanPost Number: 8 Registered: Aug-06 | Do you know the output voltage of the RCA preouts on the head unit I have? It is an Alpine 9815. |
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Gold Member Username: James1115Ct Post Number: 6276 Registered: Dec-04 | 4 volts |
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New member Username: TheforgottenmanPost Number: 9 Registered: Aug-06 | So yeah, I just changed the Gain Range to 4V and the Gain to 0. Still doesn't work... |
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New member Username: TheforgottenmanPost Number: 10 Registered: Aug-06 | Dang... dunno what to do. |
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Gold Member Username: IlluminatorUSA Post Number: 4439 Registered: Apr-05 |
There are two gain adjustments? Adjust the one that says 0 to something else and see if you get more power. Are the subs wired in series or parallel? |
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Bronze Member Username: TheforgottenmanPost Number: 11 Registered: Aug-06 | I think series. Parallel is when two of the subwoofers connect together right? If it is then it is series because the subs are connected on their own. |
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Gold Member Username: James1115Ct Post Number: 6279 Registered: Dec-04 | make sure that both jumper wires are in on each sub the hook them up 1 to each channel. You could also run them mono to that amp at 4 ohms if you use just one jumper in each sub then wire them parellel to the amp. |
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Bronze Member Username: TheforgottenmanPost Number: 12 Registered: Aug-06 | Is there a diagram you can show me? That would be greatful... please? Thanks |
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Bronze Member Username: TheforgottenmanPost Number: 13 Registered: Aug-06 | NVM, I know what they look like now. They are running as series. Thing is that the AMP won't power the subs which I have no clue how to work the amp. Jexx, yeah there are two gain adjustments. The first one is "Gain Range" and "Gain". The "Gain Range" shows 1V 2V 4V 8V 16V(I think) and the "Gain" goes like .0 .5 1.0 1.5 2.0 ... (goes up to 6 but i am thinking it goes up more). I hope this info will help you guys out as I do not how to work this. |
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Gold Member Username: IlluminatorUSA Post Number: 4444 Registered: Apr-05 | Do you have one sub running off each channel, or is the amp bridged? |
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Bronze Member Username: TheforgottenmanPost Number: 14 Registered: Aug-06 | I connected the sub(s) off of each channel. |
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Gold Member Username: IlluminatorUSA Post Number: 4447 Registered: Apr-05 | There's the problem! You have the subs wired in series, so the amp is seeing 8 ohms, thus each sub is only getting about 106w RMS! Wire each of the subs in parallel so they'll be getting 425w RMS and they should sound MUCH better! |
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Bronze Member Username: TheforgottenmanPost Number: 15 Registered: Aug-06 | Can you show me a diagram how to wire a parallel? I seriously do not know how. I have 2 JL W6v2_D4. Thanks again Jexx!! I hope it'll work though! |
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Gold Member Username: Dustin3Tigard, OR U.S. Post Number: 3167 Registered: Oct-05 | are those dual voice coil 4 ohm subs? cause if they are, you can only wire to a 1 or 4 ohm load |
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Bronze Member Username: TheforgottenmanPost Number: 16 Registered: Aug-06 | yeah they are 4 OHM subs. http://www.crutchfieldadvisor.com/learningcenter/car/subwoofers_wiring.html?subs =2&impedance=DVC2x2 Can you tell me which one to do? |
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Gold Member Username: Dustin3Tigard, OR U.S. Post Number: 3168 Registered: Oct-05 | yes they are.. so you want to bridge the subs to the amp @ 4 ohms:  |
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Gold Member Username: IlluminatorUSA Post Number: 4451 Registered: Apr-05 | According to the user's manual online(http://mobile.jlaudio.com/pdfs/7876.pdf):
They have a picture of it in the manual, I highly suggest you look at it, the .pdf itself is hardly 1mb I believe. |
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Gold Member Username: Dustin3Tigard, OR U.S. Post Number: 3169 Registered: Oct-05 | so the + and -(that are coming from the amp om that picture) are going to be hooked into the "bridged" terminals on the amplifier it should be marked "bridged" and point to a + and - terminal, thats where you want to hook the subs from |
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Gold Member Username: IlluminatorUSA Post Number: 4452 Registered: Apr-05 | It is completely unnecessary to bridge the amp! Keep each sub running off each channel, then just swap the jumper cables, it will be a LOT easier. |
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Gold Member Username: Dustin3Tigard, OR U.S. Post Number: 3170 Registered: Oct-05 | jexx the amp is 900 x 1 @ 4 ohms bridged... it would be easier just to bridget it... |
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Gold Member Username: Dustin3Tigard, OR U.S. Post Number: 3171 Registered: Oct-05 | yu just put the speaker wires into the birdged terminal, not hard..., plus you would get 450 watts to each sub |
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Gold Member Username: IlluminatorUSA Post Number: 4453 Registered: Apr-05 | Then he has to cut and swap more cable than necessary. Literally, all he has to do to correct this problem is move four 2 inch jumper cables around. Plus he would probably gain a better dampening factor from running off each channel. |
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Gold Member Username: Dustin3Tigard, OR U.S. Post Number: 3173 Registered: Oct-05 | what are jumper cables?? i just use my speaker wire, it takes less than a minute to strip all the wires off for me |
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Bronze Member Username: TheforgottenmanPost Number: 17 Registered: Aug-06 | Crap, I have a problem. I don't have 2 extra jumper cables aroudn because I got the subs as series from a private owner. |
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Bronze Member Username: TheforgottenmanPost Number: 18 Registered: Aug-06 | Can you use speaker wires as jumper cables? |
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Gold Member Username: Dustin3Tigard, OR U.S. Post Number: 3174 Registered: Oct-05 | dampening factor just depends on the output impedence...and the power supply that feeds the amp |
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Gold Member Username: IlluminatorUSA Post Number: 4454 Registered: Apr-05 | The JLw6v2 isn't your run of the mill sub, it has a simple jumper system:  Wire each sub like that. That's all you have to do. |
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Gold Member Username: Dustin3Tigard, OR U.S. Post Number: 3175 Registered: Oct-05 | is that wut ur sayin jexx? cause of the 2 ohm per channel? and yesm you can just use speaker wires as he jumpers. thats what most people do |
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Gold Member Username: Dustin3Tigard, OR U.S. Post Number: 3176 Registered: Oct-05 | i know jexx, but using speaker wires will do the same, |
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Bronze Member Username: TheforgottenmanPost Number: 19 Registered: Aug-06 | my speaker wires are 16AWG. Will it still work? |
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Gold Member Username: IlluminatorUSA Post Number: 4455 Registered: Apr-05 | "my speaker wires are 16AWG. Will it still work?" Yep! Bassman, I just didn't want him to end up having to do more work than is necessary, it really shouldn't matter if he bridges the subs or runs them off each channel, they will still receive the same amount of power with the same damping factor(had to go back and read on that heh, my bad). |
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Bronze Member Username: TheforgottenmanPost Number: 20 Registered: Aug-06 | So hey Jexx, I do what you just showed me by doing the parallel. Then run each sub as the same for EACH channel right? |
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Gold Member Username: Dustin3Tigard, OR U.S. Post Number: 3178 Registered: Oct-05 | lol. dont matter jexx, we are just having an intelligent convo man lol gogoman, it doesnt matter, do what you want. bridge or each channel, it wil both be the same. i like the bridge tho |
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Gold Member Username: IlluminatorUSA Post Number: 4456 Registered: Apr-05 | Yeah, just keep them wired as they are, if you have them wired in parallel via jumpers, you're done. You might need to adjust the gains now. Turn it up and tell us how it sounds. |
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Gold Member Username: Dustin3Tigard, OR U.S. Post Number: 3180 Registered: Oct-05 | ur wiring to 2 ohms each channel correct? |
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Bronze Member Username: TheforgottenmanPost Number: 21 Registered: Aug-06 | Ok, wierd sh*t... i just opened up the sub and checked. They were parallel all along. |
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Gold Member Username: Dustin3Tigard, OR U.S. Post Number: 3181 Registered: Oct-05 | i mean,,, wut did u have it wired to before?? 8 ohms series?? sry, i didnt read any of the other posts, lol |
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Bronze Member Username: TheforgottenmanPost Number: 22 Registered: Aug-06 | How do I know or check if I am wiring to 2 ohms each channel? |
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Gold Member Username: Dustin3Tigard, OR U.S. Post Number: 3182 Registered: Oct-05 | lol. hmmm are you sure??? i dont know then, try runnin the sub in the pic i gave you before and see if you could hear a diff.. even tho u sholdnt have you checked ur gain? |
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Bronze Member Username: TheforgottenmanPost Number: 23 Registered: Aug-06 | Yeah i checked my gain... still the same. |
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Bronze Member Username: TheforgottenmanPost Number: 24 Registered: Aug-06 | I even messed with the gain... still the same. |
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Gold Member Username: IlluminatorUSA Post Number: 4458 Registered: Apr-05 | Get a multimeter, set it on ohms, touch it to each of the ends of the speaker wires and you should be getting around 2 ohms for each speaker. |
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Bronze Member Username: TheforgottenmanPost Number: 26 Registered: Aug-06 | I'm pretty sure it is 2 OHMS because I did it as that diagram you showed me. |
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Gold Member Username: IlluminatorUSA Post Number: 4461 Registered: Apr-05 | What box are you using? Do you know the specs on it? |
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Bronze Member Username: TheforgottenmanPost Number: 27 Registered: Aug-06 | 2 12" Enclosed that fits in my JEEP GRAND CHEROKEE 97 (With a spare tire on the side) |
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Bronze Member Username: TheforgottenmanPost Number: 28 Registered: Aug-06 | Well, before I borrowed my friends amp (Crappy brand name; American Legacy) 1200 WATT amp. I connected it as regularly and it worked and thumped hard. When I connected to the SX900.2 (Same installment) the subs move but doesn't thump. You can't even hear the thumping or barely any sound comming out of it. I gotta max the sub woofer level on my head unit and turn the BASS to max on the control and turn the volume up in order to hear a LITTLE BIT of thumping. |
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Gold Member Username: Dustin3Tigard, OR U.S. Post Number: 3183 Registered: Oct-05 | hmm. what kind of box you got it in? just to try another alternative, i would wire it like i told you, bridge from the amp, and wire lkikr that diagram i gave you. when you done with that, get back to us on what it sounds like. also, do you have a bass boost on your amp? |
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Bronze Member Username: TheforgottenmanPost Number: 32 Registered: Aug-06 | Yeah there is a bass boost. I maxed that out and my alpine head unit maxed out (subwoofers) and you can hear the subs a LITTLE BIT. |
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Gold Member Username: Dustin3Tigard, OR U.S. Post Number: 3187 Registered: Oct-05 | wel, wire it like the diagram to the bridged terminals, and turn it on to see how it sounds. then come back |
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Gold Member Username: James1115Ct Post Number: 6307 Registered: Dec-04 | dont max out your bass boost's that will onl cause your amp to clip. There has to be something wrong here. so you haev 2 wires on each sub as jumper's? just to ensure that you do have it wired to a 2 ohm load. Turn both gains to 4 volts for starter's. Wire them up as you have them but with both gains at 4 and 4.0 and what do you get? Let's take this step by step. |
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Gold Member Username: Dustin3Tigard, OR U.S. Post Number: 3189 Registered: Oct-05 | he only has one amp... |
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Gold Member Username: James1115Ct Post Number: 6309 Registered: Dec-04 | I know bass but they have 2 gains |
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Gold Member Username: Dustin3Tigard, OR U.S. Post Number: 3191 Registered: Oct-05 | o really? the amp does? |
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Bronze Member Username: TheforgottenmanPost Number: 34 Registered: Aug-06 | Yeah the amp has 2 gains. "Gain Range" and regular "Gain". |
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Bronze Member Username: TheforgottenmanPost Number: 35 Registered: Aug-06 | Yeah the amp has 2 gains. "Gain Range" and regular "Gain". Oh the 4v and 4.0 doesn't work |
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Gold Member Username: James1115Ct Post Number: 6310 Registered: Dec-04 | take out your subs and wire them with one jumper wire to a series configuration. next take the pos of both speakers put them together and into the Left + terminal. Now take both negative's put them together and go into the right - terminal. You are now bridged for a 4 ohm load. Does this make a difference? |
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Gold Member Username: Dustin3Tigard, OR U.S. Post Number: 3193 Registered: Oct-05 | or just look at the diagram above |
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Gold Member Username: James1115Ct Post Number: 6316 Registered: Dec-04 | hey first before you do that make sure the Mute button isnt on on the amplol seriously |
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Gold Member Username: James1115Ct Post Number: 6317 Registered: Dec-04 | then put the gain range to 4.1 and the gain to 4 if mute is off this should work. |
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Bronze Member Username: TheforgottenmanPost Number: 45 Registered: Aug-06 | Well, i took it to an electrical engineer for car stereo and he got it working for me. I still do not know how to work it still but i don't want to mess with it. Hehe.. thanks for trying to help though guys! |
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Gold Member Username: IlluminatorUSA Post Number: 4511 Registered: Apr-05 | I wish we knew what happened to it...can you ask him what he did? |
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Bronze Member Username: TheforgottenmanPost Number: 47 Registered: Aug-06 | Yeah sure. I gotta go back there anyways. I'm thinking about buying a new amp or rear speakers. |
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Gold Member Username: Safe_crackerChicago, IL US Post Number: 1396 Registered: Jan-06 | Ummm, I own several sx amps and the gain shouldn't be at 0. Set the amp gain to 4V then bring the amp gain up to around 6, then back to us. Polo.. |
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Gold Member Username: Safe_crackerChicago, IL US Post Number: 1397 Registered: Jan-06 | Ummm, I own several sx amps and the gain shouldn't be at 0. Set the amp gain range to 4V then bring the amp gain up to around 6, then back to us. Polo.. |
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