Question about Rockford Fosgate Punch P4004 Car Audio Amplifier

1 Answer

Is this ok?

Hae im running a Kd Sh1000 headunit to RF p4004 its running RF FNX2614 6.5 components upfront and a RF HX2 12" in the back, the hx2 is running 2ohm bridged and in parallel (dual voice coil) with gain up pretty high

is this ok for the amp?

i know its rockford nd i havent had any trouble but yeah just wondering?

thanks heaps

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  • 3 more comments 
  • J Perkins Dec 08, 2008

    Ok now im looking at going into the back doors with the fanatics and putting t162s into the front,
    the back doors have not got enclosures for speakers, what do you suggest? this is a Mitsubishi lancer wagon so no parcel shelf...

  • J Perkins Dec 09, 2008

    *JVC KD SH1000 head unit 3 sets of 4v rcas Rear, Front, Sub
    *RF FNX2614 6.5 components 70watts RMS running at 4ohm off amp
    *Stock 20watt Mitsubishi 4" running of head unit in front parcel shelf also
    *RF p4004 Amplifier brand new
    *RF HX2 12" dual voice coil punch model running 2ohm bridged from amp in parrallel
    *RCAs top of the line fusion gold plated
    *Cabling is more than capable from battery about as thick as black knight licorice (had entire system installed properly by friend who was a professional).
    The box for sub is a sealed tuned 50cm x 50cm wedge behind rear seat. Yes i do not want to take up any more room in rear cargo space.
    Only place for rear speakers / components is the back doors.

  • J Perkins Dec 19, 2008

    gee urs looks sick as thats cool
    just picked up a RF 5002 to run the sub so all should be good
    brand new for 199 NZ dollars!
    btw do you run any sound deadening?
    if so any tips?

  • J Perkins Dec 20, 2008

    Ohk true, don't know if we have dynamat in NZ but ive heard its like the coca cola of the sound deadening market except expensive.
    yea forsure ill put up some pics, every things in except the 2nd amp, when that is about to go in im going to pull out the floor air vents under the seats so they both sit discretely away from prying eyes, but they will look sick when i push the seats forward to show anyone haha. I don't run my system loud its all about quality, capacitor needed do you reckon?

  • J Perkins Dec 21, 2008

    yeah im pulling out the under foot aircon under the front seats so it will all fit even neater and leave leg room.


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Yes 2ohm should be fine for that amp no problem

But dont bridge it any lower than 2 ohms.

Posted on Nov 26, 2008

  • 3 more comments 
  • Darren Kessinger
    Darren Kessinger Dec 08, 2008

    Ok im a little confused on exactly what equipment your installing

    could you possibly give me a list of everything your installing so i can give more detailed sugesdtion?


    like how many speakers total and ohms for each one would be great and are you still just using the one 4ch amp? and is cargo space in the rear of the car a concern ?

  • Darren Kessinger
    Darren Kessinger Dec 09, 2008

    Ok it looks like you've got the right idea so far and if your friend that installed it is a pro than cool!

    But if the only place to put the rear speakers in in the doors than it might be a good idea to have custom enclosures made for them.

    But about the dual voice coil 12" (nice speaker btw) but if it is 4ohn per voice coil and you have them run parallel that drops it to 2ohm and then if you have that bridged on the amp also it then drops it to 1ohm so I would check the owners manual and see if that amp is 1ohm stable or not and if it says 2ohm max then i would considers a series parallel wiring job instead where you wire the voice coils in series so that its 8ohm then when you bridge that to the amp it will be at 4ohm (which is no where near as loud but at least the amp will handle it) unless your voice coils are 8ohm each then wiring them in parallel would drop it to 4ohm and then bridging it at the amp will drop it in half again to 2ohm

    But the rear speakers should be ok wired in parallel with the fronts in stereo since that will be 2ohms per side and no problem

    this is my current system in my BMW ive had it for 10 years now.

    I know ive got all PPI equipment but ive always been a fosgate person myself (I got the PPI stuff on employee accommodation program when I was an installer)

  • Darren Kessinger
    Darren Kessinger Dec 19, 2008

    Ya I have some dynamat installed in the trunk but not allot since that stuff is expensive and its not the funniest thing to install. But of course the ideal thing would be to pretty much remove the interior and put dynamat everywhere but that is an insane project and cost quite a bit

    But it looks like you should have a pretty solid car so you might not have to many rattles but it couldn’t hurt to maybe put a small piece of dynamat (that’s the only kind ive ever used) like every few feet or so and when i say small piece it probably only would need to be like a 3"x3" little square since that will work for a good sized area and i package of it will pretty much do the whole car if you install it every few feet or so

    But I guess you will just have to install everything and see how it goes and if you come across and major rattles on the outside and have trouble getting rid of them just let me know and ill try to help since ive learned allot of little tricks over the years to eliminate them

    But do kind of realize that powerful system = loose parts in car after a while which is main reason i got a BMW this time since they are such solid cars.. (my Nissan literally started falling apart after a few But no biggie its worth it to have the system...

    Oh and by the way that was a smart idea to get that RF 5002 amp to add to your system...since that amp for the sub and the other RF 4ch amp for the mids will sound good..

    I had a fosgate system once with RF punch amps and boston acoustic pro series seperates 6.2 in the front and 4.2 set in the rear and it seems like nothing has ever compared to the sound quality that i had with that system. (sure the system i have now hits way harder and has way more power but there is just no comparison to the sound quality I had with Boston Acoutic Pro series speakers and RF amps

    Are you going to do a custom install? if so then maybe you can post pics of your system after it is finished but thats up to you

  • Darren Kessinger
    Darren Kessinger Dec 19, 2008

    Ok just a quick added note about sound deadening.. When i mentioned installing it every few feet that is just for basic tiny vibrations. But if your trying to eliminate all rattles in the car then the more dynamat you can use the better..

    But unless you want to sound proof the car then covering every square inch is not necessary...

    Like this pic here:

    This amount of dynamat will probably have the same effect as .....

    this pic here: (this is really not necessary to just eliminate vibrations

    but to seal the door for speakers with allot of power then it would a good idea.

  • Darren Kessinger
    Darren Kessinger Dec 21, 2008

    Ya that will look pretty sick...And I don’t play mine really loud locally around town since they always say its a bad idea to boom the system near your house if you don’t want it to get stolen.

    And yes a capacitor might be a good idea. and a RF cap with the digital readout on it would look pretty sick to mounted near the amps, or right in between them or something.

    (I’m just lucky that BMW comes with the car battery in the trunk so amp power wires are like 2 feet long. or i would use a cap for sure)

    wow man i just thought id check for you real quick to see if you could order dynamat online and i just noticed something they have now called "DYNASPRAY" I guess its in liquid format and covers a 54sq ft area...and cost like $200 (54 sq ft is allot of area but ive never seen it before so it might be hard to install but I bet it would work great)

    Here is a link to the dynamat website online store

    But you might want to check eBay for better prices)


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