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Dont know what power amp to get

Discussion in 'Audio & Video' started by TheMrGExperience, Jul 7, 2011.

  1. Jul 7, 2011 at 1:31 PM
    #1
    TheMrGExperience

    TheMrGExperience [OP] Because Tacos are too mainstream...and Im poor.

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    Debadged, 4x6 to 6x9 rear speaker conversion
    I just ordered a polk audio sr124 sub but dont know what amp to get. peak power is 1400watts and the rms is 700watts. impedance is 4ohms

    Does that mean i need at least a 1400 watt amp or can i get away with running a high quality JL or PA 500watt amp? I have very little knowledge about wattage and i dont even know how the eff ohms fit in to this equation so could some one enlighten me please? Thanks!
     
  2. Jul 7, 2011 at 2:34 PM
    #2
    lbridges

    lbridges Well-Known Member

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    Lee
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    Wow, almost 7-1/2" deep with a vented pole piece (8-1/2" deep box?) - where you putting that?

    Even if you don't need the following info, it might be handy for others...

    700 Watts RMS is the power rating that will cause the motor to safely avoid thermal damage from long term use at that level.

    1400 Watts peak is the power rating that will cause the motor to safely avoid mechanical breakdown from over extending itself.

    A high quality 500 Watt amp will easily under the RMS rating, and it's highly unlikely (IMO) to exceed the peak of 1400. Going from 500 to 700 RMS Watts will not be all that much difference in volume - would probably have to have two running side-by-side for an A-B comparison to really detect the difference.

    If it were me, and the price was about the same, and I could afford it, I would go for the JL Audio HD 750/1. Driving the PA SR124 - with two 4-Ohm voice coils):

    JL 750/1=750 Watts at 2 Ohms with THD <0.03% at 12 up to 14.4 volts

    PA 1200.1=800 Watts at 2 Ohms with THD <1.0% at 14.4 volts power (not spec'ed, but probably around 600 at 12Volts).

    So at the 13.5Volts I typically see on my Scanguage, the JL Audio amp will deliver the same or more RMS power at a lower distortion level. And since the JL uses a more highly regulated power supply, it will be capable of driving the sub louder when the engine is at idle. Hence my vote for the JL.
     
  3. Jul 7, 2011 at 3:47 PM
    #3
    ItalynStylion

    ItalynStylion Sounds Gooooood

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    What type of box is it going in?
     
  4. Jul 7, 2011 at 5:34 PM
    #4
    shane100700

    shane100700 Look'n like a fool with your pants on the ground..

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    Sub'd out of curiosity... :popcorn:
     
  5. Jul 8, 2011 at 10:34 AM
    #5
    brian

    brian Another Traitor

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    +1 :violent:
     
  6. Jul 8, 2011 at 12:10 PM
    #6
    pinktaco808

    pinktaco808 Hot Steppa

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    in the bed ehhh
     
  7. Jul 8, 2011 at 8:41 PM
    #7
    TheMrGExperience

    TheMrGExperience [OP] Because Tacos are too mainstream...and Im poor.

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    Debadged, 4x6 to 6x9 rear speaker conversion
    Back seat of the access cab:) thanks for the info!

    slant ported
     
  8. Jul 8, 2011 at 8:51 PM
    #8
    TheMrGExperience

    TheMrGExperience [OP] Because Tacos are too mainstream...and Im poor.

    Joined:
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    Male
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    Garrett
    Slidell, LA
    Vehicle:
    01 GMC Sierra z85 4x4 4.8L RCLB
    Debadged, 4x6 to 6x9 rear speaker conversion
    would the JL 750 have enough power for a sealed box if i went that way?
     
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