Question about Kicker SX1250.1 Car Audio Amplifier

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I have an sx1250.1 with two dual voice coil 4 ohm L7 12's. i am just wondering what i should set the settings too. my head units output is 2.5.

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  • Anonymous Nov 11, 2008

    sx1250.01 light up and will not play

  • jasons247 Jan 13, 2009

    Mine flashes "Service"

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  • 68 Answers

To revolveri, You need to turn your head unit up to about 3/4 of the way up the set your input gain of your amp or amps to the point where the output is distored, then turn it back down a little till the distorion is gone. Then adjust the other settings to your liking. It's a good Idea to keep your lows, mids, and highs crossed over correctly so you dont miss out on any of those frquencies. It's basicly how you like it to sound, it's your car and your system.
To jasons247, when that happens try going into the diagnostic mode to see any trouble code faults. This amp will store fault codes then I do beleive in the manual you can look up those fault codes for the problems. If you can't get into the diagnostic mode then your amp needs servicing like it says. If you have a warranty use it if not take it to a repair shop and have them trouble shoot it, They will charge a bench check charge to see what's wrong with it, so find that out first. If they do figure out what's wrong with it chances are they will charge you big bucks to fis, but find out first. If you need it repaired at a cheap price I repair car amps everyday and have repaired 2 of these amps that had blown output transistors the other amp is a different story. A guy shipped me one from Ohio, and the other guy shipped me the amp from Wisconsin. I don't charge like the other online repair shops do. I have my own shop and have 2 degrees in electronics. I have a young man from E-bay that sends all his broken amps he buys from auctions to and I repair them. He pays for parts and shipping both ways. I just keep track of what I fix for him then if I need some mone he puts it into my pay-pal account or if I see something I want from his store, we wor out a deal. I tell you this just to give you some insight as to what I can do for you. This paticular amp you do not want to try and repair yourself. That's what happend to one of these amps I repaired, the kid tried repairing it himself and I had to order a board from kicker to fix it cause of the digital circuitry it uses. If interested let me know. Leave me an E-mail.
To Guest, same thing applies to you, check your diagnostics out on the amp. If you lost the manual you can download it from kickers site. Good luck to all and if you need any further assistance let me know. Thanks.

Posted on Mar 07, 2009

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Depending on the PA FUBAR you have. The voice coil on those subs are DVC. Dual Voice Coil. You need to know a couple things. What kind of amp are you going to run on it. And what is the resistance (OHM) rating of each voice coil. MY two 12's are dual 4 ohm. Meaning that there are essentially 4 speakers to hook up. My amp currently is not 2 ohm stable in bridged. So what I did is run each speaker in parallel (red2red,black2black) then run to the box terminal. So now the dual 4 ohm voice coils are basically 2 ohm. I have 2 speakers. Now I hook the box up in series. To bring the now two 2 ohm speakers into one 4 ohm speaker. This is called series/parallel setup. My amp sees this box as 1 channel @ 4ohms. The downfall to this is the output of the amp is divided up into each speaker. So instead of sending all 1400 watts to one sub. I will send 700 to each sub. But here is a catch. even though each speaker is half the total wattage it will still be 3db louder. Meaning it will be as loud as 1 sub running 1400 watts. To conclude i need to know how many of those subs you are going to run on the amp.. And the model number of the amp so I can match up your wiring.

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Hi Adrian,
To be honest, it depends on your amp, also on whether this is a dual voice coil sub or a single.

As a rule, if the sub has a dual voice coil (2 sets of connections) then connect the 2 positives together and the 2 negatives and run the 2 sets of cables to one output on the amp.

Check your amp specs to make sure that it will run @ 2 Ohms as this is what will result.

If your amp isn't 2 Ohms stable then you will have to wire each voice coil to a separate output on the amp.

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Hi there,
This amp should run comfortable at 2 ohms/channel. However, your dual voice coil subs are rated at 4 ohms. This means when you connect the 2 voice coils together in parellel (positive to positive and negative to negative both coils wired to one output) the amp will see 2 ohms. So if you connect both subs to one output then your amp will see 1 ohm (not good) If you run the voice coils in parellel but the subs in series then the 2 resistances (ohms) will be added together. So that way the amp will se 4 ohms. This is fine but the amp would push more power into 2 ohms. You can run one sub on each channel if you can split the head unit output to 2 outputs, problem is then you will be halving the amount of power to each channel. Personally I would probably be more inclined to run 1 sub on this amp and run another amp from the pre-outs on the first amp for the 2nd sub. Try to find another amp the same to run the second sub. Mind you, 2 of these amps will need some big power cable to run them but should shake your teeth out!
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http://www.hometheaterhifi.com/volume_1_1/v1n1spk.html

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The easiest way to think of wiring voice coils and subs is this:
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    • 4 ohms in parallel with 4 ohms = 2 ohms
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    • 4 ohms in series with 4 ohms = 8 ohms
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In this case, you want to wire two subs, each with dual 4 ohms voice coils, so that the total equals 2 ohms. Your options are:
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With two, dual 4 ohm subs, you can only have 1 ohm or 4 ohm total impedance.

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