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Thread: will a 700watt 2 channel amp be ok for

  1. #1
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    will a 700watt 2 channel amp be ok for

    will a 700watt 2 channel amp be ok for 2 12" dual coil 400 watt dubs ?

    to gather they are 800w the 700watt amp would put out 350 watt per channel will this be ok and not blow the subs ?

    and what would be a good quality amp be that wont coast an arm and a leg

    i was looking at JL audio but cant find a 700/2 amp

    thanks

  2. #2
    Newbie NiceLyphe's Avatar
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    A Higher wattage amp should not technically "Blow" your subs, Always better to overpower than underpower. Are those true RMS numbers? or just MAX wattage numbers?

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    the Manuel says rms 400 and right now there hooked to a 280 4 channel amp way under powered 70watts per channel

  4. #4
    Newbie NiceLyphe's Avatar
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    I see, Yea I would def go with more power..If the 700/2 is in your price range i say go for it.

  5. #5
    MySQL Error soundman98's Avatar
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    what is the rms specs of the speaker and the amp? or better yet, could you post the models that you are talking about?


    a higher wattage amp will not blow lower wattage speakers-- at least not right away.

    i ran 150w max(75w rms) subs off a 300w rms amp for 3-4 years-- the amp is still in use in my car, and the subs still work..

    it all depends on how they are setup, and how hard you run them.

  6. #6
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    all i could find is

    12" Dual 4 Ohms Performer Series Subwoofer
    Power Handling:

    Peak: 800 watts
    RMS: 400 watts

    Impedance: Dual 4 ohms
    Carbon glass fiber cone
    EPDM rubber surround
    2 ohm or 8 ohm operation


    Multi-connect lug lock terminals
    2" Dual 4 ohm voice coil
    Frequency response: 20-500 Hz
    Sensitivity: 93 dB

    remember i have 2 of them

    what about getting a 500/1 mono amp and having them wired for 4ohms i was just thanking about JL audio JX500/1
    Rated Power 14.4 V: 340W x 1 @ 4 ohm - 500W x 1 @ 2 ohm
    Last edited by rickybennett; 08-18-2011 at 11:24 PM.

  7. #7
    Variable Bitrate chris350's Avatar
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    speakers are underpowered with the amp. you will not get 14.4 volts in your car, 13 volts maybe... you can run ONE speaker on the amp efficiently .. if you run both 12 inch subs.. you risk burning something out.. speakers first...

    the speakers are 400 watts RMS.. which mean 400 watts is where the speaker will play at optimum levels
    800 peak power is the highest power it can take momentarily not steadily. ..

    if you bridge that 700 watt amp to those two speakers, the ohms will be 2 ohms load.. and thus you will have 800 watts rms that you have to push to those speakers
    and being that the amp is peaking at 700watts.. its about 350 rms ( if you got 14.4 volts).... so you are seriously under powering the speakers and straining the amp..
    just my 2 cents...
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  8. #8
    Raw Wave
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    Quote Originally Posted by chris350 View Post
    ...( if you got 14.4 volts)....
    If only it had a quality SMPS.

    I find it strange that so many (high power) amps claim output powers that are proportional to the supply voltage-squared.
    Strange indeed!

    FYI - I just butchered some kicker amp - it used a typical TL494 SMPS chip.


    But I learned something from the above - unless I turn my amp volume up to full, I am straining the amp, or wrecking my speakers.
    That's news to me. ( )

  9. #9
    Variable Bitrate chris350's Avatar
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    Lol. You can turn the gain down but that's like having a pools table and only bring able to use one pocket. The speaker is not being used to it's full potential. Might as well get speakers that the amp can handle. Kinda like our brains, scientist
    Say we only use about 10% of it, the rest is just a waste lol. I can go on and on with the analogies lol
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  10. #10
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    Quote Originally Posted by chris350 View Post
    Kinda like our brains, scientist Say we only use about 10% of it, the rest is just a waste
    Alas a common misconception and quote, but totally false. It's like saying that computer memory is wasted because it only uses one byte or word (at a time).

    The correct statement is that we use ALL our brain, but only 10% at a time. (ie - average instantaneous brain utilisation is 10%)
    The becomes evident if you have seen enough brain activity mappings etc.



    Too late to nip that one in the bud (like the flat earth crap), but I do try to dispel such myths.


    PS - not that I used any analogies in my previous reply(s).
    Last edited by OldSpark; 08-19-2011 at 02:17 AM. Reason: PS...

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