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Will this amp do what i need

Discussion in 'Audio & Video' started by Tildenw, Feb 17, 2012.

  1. Feb 17, 2012 at 6:58 PM
    #1
    Tildenw

    Tildenw [OP] Member

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    kenwood x700-5 want to push my front comp. esk165 and my sub s2 rockford fosgate. Just did not know if i would need more power then what i have. Here are stats on AMP. BTW i am going for SQ not loudness.


    Audio section
    Rated power output (+B = 14.4V)
Stereo 4CH + SUB (4 Ω) .................... 40 W × 4 (20 Hz – 20 kHz,
    ≤0.1%THD)+300W(20Hz–200Hz,≤0.5%THD) Stereo4CH+SUB(2Ω)......50W×4(1kHz,≤0.5%THD)+ 500W(100Hz,≤0.5%THD)
    Bridged+SUB(4Ω)........100W×2(100Hz,≤0.5%THD)+ 300W(20Hz–200Hz,≤0.5%THD)
    Speaker impedance ............................... 4 Ω (2 Ω to 8 Ω allowable) (Bridged connection: 4 Ω to 8 Ω allowable) Frequency Response (+0, –3 dB)............................... 5 Hz – 50 kHz (+0, –3 dB)...............20 Hz – 200 Hz (SUB) Input sensitivity (RCA)...................................................0.2 V – 5.0 V Signal to noise ratio................................................................ 100 dB Input impedance.......................................................................10 kΩ

    CEA-2006
    RMS Watts per channel @ 4 ohms, ≤ 1% THD+N ............................................................. 40 W × 4 + 300 W (SUB) Signal to noise ratio
(Reference: 1Watt into 4 ohms) ......................80 dBA
     
  2. Feb 17, 2012 at 7:00 PM
    #2
    Tildenw

    Tildenw [OP] Member

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    If you could not tell, i know SH*T about audio systems.
     
  3. Feb 17, 2012 at 7:11 PM
    #3
    mattg43

    mattg43 Well-Known Member

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    Are you only doing the front components? If so, you can bridge the 4 channels down to 2, and have 100w going to them, and 500w (at 2ohm, if that is what you have) going to the sub.


    With that said, I dont know what the cost of that amp is, but almost any 5 channel will work for that. Or three channels, but those are more rare.
     
  4. Feb 17, 2012 at 7:11 PM
    #4
    Warhorseforever

    Warhorseforever Will The Thrill

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    Is this your amp and speakers?
    Subs, which one is it?:http://www.crutchfield.com/S-2HcUKSn1ICp/shopsearch/rockford_fosgate_punch_p2.html

    Amp:http://www.crutchfield.com/p_113KAC...l?tp=35808&nvpair=FFBrand|Kenwood#details-tab

    Speakers?:http://www.hertzaudiovideo.com/default_en.htm

    Just looking to be a little bit more specific about what you have so that I can give to a good answer. So far it's looking like it will do fine but under power everything, which is fine but there are better options that I will tell you about when you give me specifics.
     
  5. Feb 17, 2012 at 7:27 PM
    #5
    Tildenw

    Tildenw [OP] Member

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  6. Feb 17, 2012 at 7:28 PM
    #6
    mattg43

    mattg43 Well-Known Member

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    are you running 1 set of speakers or two?

    Can you give model numbers, instead?

    The links just go to the home page.
     
  7. Feb 17, 2012 at 7:37 PM
    #7
    Tildenw

    Tildenw [OP] Member

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    should be fixed now sorry

    but it is esk165 up front and the coaxil in the read doors (double cab)
     
  8. Feb 17, 2012 at 7:37 PM
    #8
    mattg43

    mattg43 Well-Known Member

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    Thanks for changing the links to the PDF.

    Would I want a bit more power - yes. Will it work and still get plenty loud - yes.

    What would I do - bridge the amp to the front speakers, and run the rears off the head unit. or no rear speakers at all, but that is up to you.

    If you truly want to amp all 4, I would probably go for something like a Kenwood XR5s, JL XD700/5, Alpine PDX 5 channel, or similar. But be aware that going from 40w to 80w is only going to give you 3db of additional output, and you wont get another 3db until you hit 160w.

    Dont obsess about matching power. Anything between 64 and 128w will be about the same output for the speakers, and anything between 250 and 500w is going to be close enough on the subwoofer output that you dont need to sweat it unless you are competing...
     
  9. Feb 17, 2012 at 7:40 PM
    #9
    mattg43

    mattg43 Well-Known Member

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  10. Feb 17, 2012 at 7:41 PM
    #10
    Tildenw

    Tildenw [OP] Member

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  11. Feb 17, 2012 at 7:43 PM
    #11
    Warhorseforever

    Warhorseforever Will The Thrill

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    Your speakers are rated for 100w RMS and the amp will be putting out 40w rms for those speakers, this is fine. However your sub channel will be over powering your sub at full tilt, but you can turn down the gains until you are at your max rms. You should be fine with that sub but you will need to turn the bass gains down so that you will not blow the sub up.
     
  12. Feb 17, 2012 at 7:51 PM
    #12
    Tildenw

    Tildenw [OP] Member

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    Thanks for the info on the sub, i will make a note of that and make sure it is done. Thank You
     
  13. Feb 17, 2012 at 8:00 PM
    #13
    Warhorseforever

    Warhorseforever Will The Thrill

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    An easy way to do this is to get a mulitmeter and before you hook any speakers up, to keep the neighbors happy, put power to the amp and measure the amps and volts that it is pumping out on your sub channel. Using the formula Watts=Amps x Volts set your gains so that your watts are under the rms for the sub.(200) Then run your wires and hook everything up. Also when you're doing this make sure your Bass Boost and equalizer on the amp and head unit are at zero
     
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