Question about Rockford Fosgate 800.2 Car Audio Amplifier

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Melted speaker wire

I have a 800 a2 old school and my subs just quit. I noticed the speaker wires from the amp to the termanal of the box had melted. What would cause this ? The wires connected to the amp are fine?

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  • spreadhead1 Nov 01, 2007

    Its probably a 12 to 16 gage wire if that helps

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  • 105 Answers

Whats the size of the wire? If they are too small they will melt and even catch on fire. Let me know.

Posted on Nov 01, 2007

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1 Answer

I have an old school autotec xs 1500.1 and need to know how to hook up the outs to make it 1 ohm


Since it is a mono block amp, it depends on your subwoofer (s), and how you wire them to the amp.

Single 4 ohm sub would be just that, 4 ohms.
Single dvc 4 ohm sub, with both voice coils wired parallel would be 2 ohms.

2 dvc 4 ohm subs wired parallel would be a 1 ohm load.

Feb 20, 2015 | Ohm Car Audio & Video

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I have two wires coming from amp and my sub box only has one possitive and one negative for two subs how do I make this work


Your subs are set to connect as one channel... One Speaker, even though as a SET.

You can either hook them up as is. meaning to the rear amp channel or the front. which ever option your amp offers.

OR

Open the sub box, disconnect the one speaker from the other and fish the new wire through the box so you can connect them to the Amp separately.

I suggest going with the first option and connecting them on the AMPS, rear channel...


Good luck


Respectfully

Jun 10, 2011 | Car Audio & Video

1 Answer

Hi there i have just purchased two newer model type r alpine subs and a week ago i got a great deal on a rockford fosgate 800 a2 amplifier. The amp has two outputs and don't know exactly what ohms are at...


if you bridge it i believe you run at 4 ohms instead of 8 even if the subs are wired together i would not bridge it for fear of blowing the subs. if you where to bridge it it would be the left channel on one terminal and the right on the opposite terminal. but i highly advise against bridging it as they are wired together. its running at the proper impedence NOT bridged.

Mar 14, 2011 | Car Audio & Video

1 Answer

My amp has power but then immediately goes red into protect mode.


Ok, being an old-school "back yard" installer when i began, gave me 2 immediate possible diagnosis for your problem. I was running a Kicker zx550.3 amp to 2 Polk DB 12'inch Subs rated 600w max 1500w. I also used a LOC converter (Line Output Converter) in order to use my stock Bose stereo since it did not have RCA outputs. Now shortly after running this setup (approx 2 weeks) I noticed a substantial drop in sound output and also noticed some ground noise/distortion coming thru the subs. After tracing my wires that connected my LOC to the Amp, and Rear Speaker Wires of my Radio to the LOC, I noticed that by jostling the wires there was a connection issue. If you are using your factory radio to power your regular component speakers (tweeters, coax, mids) then chances are your stereo feeds into a FACTORY INSTALLED amplifier. If thats the case, then you need to access a Wiring Diagram for the Harness coming off the Factory Amplifier! Once this is viewable, check the wiring and locate the "Amplifier to Radio Signal Wires" and also the "Amplifier to Speakers Signal Wires" ... Now go back to your LOC and look at the wires you tapped to get the Line Signals to the converter, and make sure that you havent tapped your lines off of the AMPLIFIER TO SPEAKER wires. These wires carry a small electrical current because they are coming powered from the Amplifier, and most Line Output Converters are PASSIVE, which could short the signal the LOC creates thus reducing your signal gain, but does have the capability to surge back to the Factory Amplifier, which could possibly melt the shielding of the factory wiring, and thus allow your signal to cross or ground out! If you can, try running another RCA input to your Sub-Amplifier from another source other than your car, and see if your protection lights go out and the amp returns to normal operation. If so then your LOC or Factory amp is to blame. If not, then the second diagnosis is much simpler, which is your Alternator current has been reduced due to many different possibilities, and you should acquire a .5 or 1 Farad Stiffening Capacitor which will reduce the excess draw from your charging system. But due to the first solution being my problem exactly, im willing to bet your's lies along the same variables... GL to you!

Apr 21, 2010 | Sony Car Audio & Video

2 Answers

Try to install 3 12w3d6 subwoofers connecting 3 sub together to put them in box


You need to wire them according to the limitations of your amp you can pull a 1 ohm overall load just by connecting all of your coils in parallel- or you can get an overall load of 4 ohms by wiring each sub individually in a series configuration which will yield a 12 ohm load per sub -and then wire the 3 sets in parallel which will bring your ohms back down to 4. You can do a lot with that many coils it depends on your amp really-ideally a 1 ohm stable class d mono amp that is 1000-1500 watts rms would knock the **** outta those things JL is the good stuff.

Jan 16, 2010 | Jl Audio 12W3 Car Subwoofer

2 Answers

SUBS


Hi , you need to replace with thick wire , if possible attache fuse or circuit trip overload protection you may ask to thew radio store .

May 07, 2008 | Polk Audio EX12 Car Speaker

2 Answers

Not even static?!


if the flex wires are atached from the cone then the coil is disconnected.hit me up if you need more info.

Aug 09, 2007 | Dual XINBP-210 Car Subwoofer

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