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Newbie to car audio, got a basic question!

Discussion in 'General Car Audio Discussions' started by rs-ross, Dec 23, 2007.

  1. rs-ross

    rs-ross Full Member

    Hey guys, im new to all this car audio stuff, so have a basic question that im sure someone will be able to answer!:p

    My headunit has a 4x45 watt amplifier built in - if i want to upgrade my standard front and rear speakers to full range coaxials which will be powered by the headunit, what should i be looking at in terms of "RMS" etc etc.

    All help is much appreciated,

    Cheers :lol:
     
    rs-ross, Dec 23, 2007
    #1
  2. jonnyv713

    jonnyv713 The Young Gun of CAT

    I would actually recomend that u just buy ureself a good but still cheap amp. U would be much more happy with how it sounds. What speakers were u looking at, and what size do they have to be?
     
    jonnyv713, Dec 23, 2007
    #2
  3. rs-ross

    rs-ross Full Member

    well the thing is i really am on a budget, just need something that will be ok for the time being. Just a set of speakers that goes directly in place of the original ones. I will be going into more detail with my car audio later, but at the moment the engine is where most of my funds are being used.:cool:

    I need 2 x 10cm and 2 x 13 cm
     
    rs-ross, Dec 23, 2007
    #3
  4. jonnyv713

    jonnyv713 The Young Gun of CAT

    Well i am always on a budget too but it still can be done. Trust me.
    Get maybe this for an amp, maybe a lil bit more power but ya
    Power Acoustik PS4-300 - 4 ohms: 40 watts x 4 • 2 ohms: 50 watts x 4 • PWM MOSFET power supply • High or low level inputs with floating ground • Tri-Mode capable • S/N ratio: 97 dB • Frequency Response: 10 Hz - 30,000 Hz - , Car Amplifiers, Multi-cha
    maybe this one depending on how the budget is
    Crunch PZi 100.4 - 600W 4-Channel Amplifier • 100W x 4 chan. @ 4 Ohms • 150W x 4 chan. @ 2 Ohms • PWM power supply • illuminated logo • silver RCA line inputs/outputs • silver power connectors • powered by Maxxsonics - , Car Amplifiers, Multi-channel

    then the speakers will depend on the size. when u can tell us that we can help even more.
     
    jonnyv713, Dec 23, 2007
    #4
  5. aznboi3644

    aznboi3644 Full Member

    your head unit wont push more than 16 watts x 4 channels.

    Any decent quality speaker will sound fine if installed correctly
     
    aznboi3644, Dec 23, 2007
    #5
  6. rs-ross

    rs-ross Full Member

    The speaker sizes i will be fitting will be 10 cm in the front and 13 cm in the rear. I live in the UK, but that amp looks very good for that low price. If i were to get an amp, how would i wire it so it could power the speakers which will be connected to the original wiring?
     
    rs-ross, Dec 23, 2007
    #6
  7. jonnyv713

    jonnyv713 The Young Gun of CAT

    what are the speakers in inches 3.5, 4x10, 4,5.25, 6x9, etc, etc
     
    jonnyv713, Dec 23, 2007
    #7
  8. jonnyv713

    jonnyv713 The Young Gun of CAT

    o so 4in and 5.25 i am guessing lol
     
    jonnyv713, Dec 23, 2007
    #8
  9. jonnyv713

    jonnyv713 The Young Gun of CAT

    jonnyv713, Dec 23, 2007
    #9
  10. rs-ross

    rs-ross Full Member

    yes thats absolutely correct lol
     
    rs-ross, Dec 23, 2007
    #10
  11. rs-ross

    rs-ross Full Member

    thnx jonny, i have seen these for sale here in the uk at all the car audio stores. So if i got those speakers, would i need to get an amp to power them, or would they be ok being powered by my headunit?
     
    rs-ross, Dec 23, 2007
    #11
  12. jonnyv713

    jonnyv713 The Young Gun of CAT

    i would use this
    Power Acoustik PS4-300 - 4 ohms: 40 watts x 4 • 2 ohms: 50 watts x 4 • PWM MOSFET power supply • High or low level inputs with floating ground • Tri-Mode capable • S/N ratio: 97 dB • Frequency Response: 10 Hz - 30,000 Hz - , Car Amplifiers, Multi-cha

    maybe wired with this
    DHD NTX-5570 - 8 Gauge Single Amp Installation Kit • 20' 8 AWG Power Wire • 4' 8 AWG Ground Wire • 20' 16 AWG Remote Lead • 20' Twisted Pair RCA Cable • 20' 12 AWG Speaker Wire • 6' Split Loom Tubing • 60A AGU Fuse and In-Line Holder • Mounting Screw
     
    jonnyv713, Dec 23, 2007
    #12
  13. rs-ross

    rs-ross Full Member

    rs-ross, Dec 23, 2007
    #13
  14. rs-ross

    rs-ross Full Member

    what figure must you look at on amps and speakers so u can match them together correctly?
     
    rs-ross, Dec 23, 2007
    #14
  15. jonnyv713

    jonnyv713 The Young Gun of CAT

    watts and how many channels
     
    jonnyv713, Dec 23, 2007
    #15
  16. rs-ross

    rs-ross Full Member

    so on an amp would you look at peak output and compare that to peak output of speakers? eg

    A 300w amp with 2 channels would be suited to 2 speakers that have an output of 150w each?
     
    rs-ross, Dec 23, 2007
    #16
  17. jonnyv713

    jonnyv713 The Young Gun of CAT

    well sorta lol i just dont really know how to explain it. Umm azn would prolly love to explain lol
     
    jonnyv713, Dec 23, 2007
    #17
  18. aznboi3644

    aznboi3644 Full Member

    peak output means NOTHING.

    the power you want to look at is CONTINUOUS or RMS output.

    Also you must look at quality brands...cheap brands over-inflate the output ratings.

    To power the speakers using the factory wiring you can run speaker wires from the amp to behind the head unit and splice them to the factory harness.

    As for looking for an amp to push the speakers...I would look at an amp that can put out more power than your speakers can handle...headroom is good. It will be less likely for your to clip the amp and blow the speakers by cranking it up to get some volume
     
    aznboi3644, Dec 24, 2007
    #18