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Thread: Rockford Fosgate P8002 probs |
    
New member Username: Alex711
Post Number: 1
Registered: Oct-04
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| Posted on Monday, October 04, 2004 - 01:27 pm: |
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I have a Rockford Fosgate P8002.Thought it was a good amp to get.anyway i have it pushing just 2 12" HU's briged but the amp keeps cutting off when i listen to it for awhile.Is there anyway of keeping it from doing that.Is it just getting to hot.I have a 4 gauge power wire with no fuse,i figured that was the problem.when i bought the wires they gave me a fuse holder without a fuse so i figured i would just leave off the fuse holder.If anyone has any suggestions i'd really appreciate it. |
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Silver Member Username: Pat_l
Tucson,
AZ
USA
Post Number: 633
Registered: Apr-04
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| Posted on Monday, October 04, 2004 - 07:16 pm: |
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Well you need a fuse, make sure you put one in your power wire (it will protect everything). Make sure you add the fuse and holder about 1 to 1.5 ft from the battery. So make sure you put one in there. Also check you ground, dont just look at it. Make sure it is very, very tight. Lastly, which way is the amp mounted? Air flow and operation will be better if the AMP is mounted Vertically, not horizontaly- like flat. |
New member Username: Alex711
Post Number: 2
Registered: Oct-04
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| Posted on Tuesday, October 05, 2004 - 12:23 am: |
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ok i'll try that thanx..o and by the way what size fuse should i use...120??appreciate it. |
Silver Member Username: Pat_l
Tucson,
AZ
USA
Post Number: 639
Registered: Apr-04
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| Posted on Tuesday, October 05, 2004 - 12:55 pm: |
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Use a 120, that should do it
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Gold Member Username: Jonathan_f
GA
USA
Post Number: 2034
Registered: May-04
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| Posted on Tuesday, October 05, 2004 - 03:34 pm: |
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You need a fuse, but it's obviously not the problem in this case, b/c the amps fuses would have blown if it was drawing too much current. The fuse is to protect the car's electrical system, not the amp. What impedance are the subs and how do you have them wired? That amp requires a 150 amp fuse at the battery, by the way. |
New member Username: Alex711
Post Number: 3
Registered: Oct-04
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| Posted on Wednesday, October 06, 2004 - 12:21 am: |
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o ok the manual just said 120 watt but i'll look for a 150.i have 2 Rockford Fosgate 12" Hu's briged i believe they r 800 watt..i'm not even sure if the amp is getting enough power either cuz the fosgate symbol doesn't get real bright and blinks when it hits all my other fosgate amps have always had a continious bright light.but iono..preciate all the help though |
Gold Member Username: Jonathan_f
GA
USA
Post Number: 2053
Registered: May-04
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| Posted on Wednesday, October 06, 2004 - 12:29 am: |
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If the manual says 120 use 120, I got 150A from the website. Sounds like you have a current delivery problem, and that can definately cause the amp to overheat because the voltage rails will "sag", basically it leads the amp into clipping prematurely. |
New member Username: Alex711
Post Number: 4
Registered: Oct-04
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| Posted on Wednesday, October 06, 2004 - 01:59 pm: |
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so should the fuse stop the amp from cutting off all the time?? |
Silver Member Username: Pat_l
Tucson,
AZ
USA
Post Number: 644
Registered: Apr-04
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| Posted on Wednesday, October 06, 2004 - 03:18 pm: |
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Try it and see, it wont hurt to put a fuse in the line. |
New member Username: Alex711
Post Number: 5
Registered: Oct-04
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| Posted on Wednesday, October 06, 2004 - 11:41 pm: |
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yeah i was gonna do it all along i was suppose to get a fuse when i bought the amp kit but it didn't come with one i just wasn't sure if it was gonna solve the cutting off problem or not.. |
Gold Member Username: Jonathan_f
GA
USA
Post Number: 2109
Registered: May-04
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| Posted on Thursday, October 07, 2004 - 12:09 am: |
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I doubt it. A fuse is a fuse, it's either blown or not. It has no function other than to blow on an overload. You still need a fuse for protection, though, but it's not the source of your problems. What impedance are your subs and how are they wired? |
New member Username: Alex711
Post Number: 6
Registered: Oct-04
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| Posted on Thursday, October 07, 2004 - 01:11 pm: |
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4 ohms x 2/2 ohms x 2 and i have them briged.
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Gold Member Username: Jonathan_f
GA
USA
Post Number: 2132
Registered: May-04
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| Posted on Thursday, October 07, 2004 - 02:44 pm: |
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How did you wire them to the amp? series, parallel? Also, how'd you wire the voice coils? |
Silver Member Username: Fishy
Tamarac,
FL
USA
Post Number: 382
Registered: Sep-04
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| Posted on Thursday, October 07, 2004 - 05:53 pm: |
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If you have a multimeter I'd check the voltage to the amps at zero volume with the car running(the logo is dim then right?) If you've got close to 14 volts there's probably nothing you can do to increase the "steady" brightness level.
At the moment a cap might help with the blinking, but you'd probably be better off investing in a higher output alternator(if you can't keep 13-14 volts up) and that may solve both problems. If not you could get a cap afterwards to help with the blinking.
-Fishy |
New member Username: Alex711
Post Number: 8
Registered: Oct-04
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| Posted on Thursday, October 07, 2004 - 11:37 pm: |
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i have them hooked up parallel i believe i can't remember.and ight fishy i'll check that out. |
Silver Member Username: Fishy
Tamarac,
FL
USA
Post Number: 407
Registered: Sep-04
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| Posted on Friday, October 08, 2004 - 03:57 am: |
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Are there any head units that have built in voltage gauges?
These days they have so many ridiculous bells and whistles like stupid graphics such. They oughta add something PRACTICAL like this.
-Fishy |
Gold Member Username: Jonathan_f
GA
USA
Post Number: 2167
Registered: May-04
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| Posted on Friday, October 08, 2004 - 04:37 am: |
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I encourage any potential future head unit designer to make me an EXTREMELY simple head unit  . Here goes: Volume(analog) Power that turns on and off when I push the volume button, track change, preset change for FM/AM, and source change. That's it. K grade 24 bit DACs, 96khz sampling rate. Zapco 16V Symbilink preout (1). Copper chassis. DC/DC converter leading power to it. Black faceplate that actually blends in cosmetically to a car interior. No motorized crap, no flip down faceplate. CD slot. No fancy displays either, a simple backlight in yellow and black numbers will do, and all that they read are either the station, or track number of CD and elapsed time. Is that so much to ask? |
Gold Member Username: Jonathan_f
GA
USA
Post Number: 2173
Registered: May-04
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| Posted on Friday, October 08, 2004 - 05:43 am: |
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Oh yeah, Fishy, I know the Premier DEX-P9 has a voltage readout. Not exactly a cheap head unit, though. |
Silver Member Username: Fishy
Tamarac,
FL
USA
Post Number: 418
Registered: Sep-04
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| Posted on Friday, October 08, 2004 - 07:10 am: |
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A clock.
The clock that came in my Explorer was in the stock h/u.
-Fishy |
