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

Posted by on

  • 3 more comments 
  • Josh 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...

  • Josh 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.

  • Josh 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?

  • Josh 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?

  • Josh 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.



1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 5 achievements.


    An expert who has written 50 answers of more than 400 characters.


    An expert who has written 20 answers of more than 400 characters.

  • Expert
  • 85 Answers

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)



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Have changed headunit and also speakers..but still got my problem..plays ok till i up the volume then the headunit reboots by itself ... help please

Check the DC voltage at the Yellow and red wire to see whether it falls down when you raise the volume. If you have no meter to check, then buy a battery tester from auto parts shop. If the voltage falls down with volume, check the fuse or contacts in the fuse box.

Feb 27, 2012 | JVC KD BT11 CD MP3 CAR RADIO IPOD AUX...

1 Answer

The radio is getting power and the blue light around the the volume knob is staying on but the rest of the unit isn't powering on

I would try and check two different items. First, using a multimeter or test light ensure that there is correct voltage going to each of the sources and you have a good solid grounding source. Second is trying a reset to the unit.

Nov 11, 2010 | JVC KD-SH1000 CD Player

1 Answer

How to connect a pioneer amplifier to sony cd player in car

easy as matey!

connect RCA leads to the preout in the back of the sony headunit run it down one side of the car into the boot and connect the RCA leads to the amp

You will need to wire in the power earth and remote

Remote lead connects to the BLUE N WHITE wire on back on head unit

Run the power lead and remote down one side of car and the RCA leads down other side which will stop interferance

then just connect the ground and that should be you done

Upfront Audio

May 08, 2009 | Car Audio & Video

1 Answer

Turns on no sound

Check the iso connector at the back make sure the speakers are all plugged in if they are then you have a faulty headunit there mate.

Best solution i can offer is to buy a cheap basic cd player for it

Hope this helps
Upfront Audio

Please rate and leave feedback :)

Apr 17, 2009 | Car Audio & Video

1 Answer

Remote wire?

The remote wire on the jvc unit is blue/white stripe if that isn't there it's the blue wire

Apr 08, 2009 | JVC KW-AVX800 CD Player

1 Answer

Is this ok?

Yes it sounds like it should work.

Jan 06, 2009 | Car Audio & Video

1 Answer

I have a sega genesis. i hae no look how to hook it up. please help me.

well a sega genesis there are 3 different models all either using RF adaptors or AV cables

if RF adaptor please follow this

plug the RF adaptor into the back of your tv the coaxal cable for your tv service ushally runs through this, and plug it into the the back and you can also plug the service into the RF adaptor for the sega genesis. plug the power in and make sure you are on the correct channel (3or4)

If you are using AV cables please advise and I will post the following for that.

Aug 11, 2008 | Video Game Consoles & Games

1 Answer

P4004 - Blown Components

if burned components are on output stage or amplifier section on board..Then look at the oposite side of amp..Both amplifier section should be a mirror image oof componentc from other..that way you can know the values of parts.If they are on power supply section ..Then you might need manual if available..

Dec 23, 2007 | Rockford Fosgate Punch P4004 Car Audio...

Not finding what you are looking for?
Rockford Fosgate Punch P4004 Car Audio Amplifier Logo

Related Topics:

195 people viewed this question

Ask a Question

Usually answered in minutes!

Top Rockford Fosgate Car Audio & Video Experts


Level 1 Expert

53 Answers


Level 2 Expert

150 Answers

Tygh Duval
Tygh Duval

Level 2 Expert

300 Answers

Are you a Rockford Fosgate Car Audio and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides