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Choosing speakers for pa, HELP!!

  • 01-12-2009 12:50am
    #1
    FunkeeFresh
    Registered Users, Registered Users 2 Posts: 26 ✭


    Hey!

    Im not "educated" on this topic so i was hoping some of you could give me a bit of help:)

    My friend has just bought a behringer powered mixer for our band and I have decided to get the speakers

    Heres the Powered mixer:
    http://www.thomann.de/ie/behringer_pmp_2000.htm

    Its 350w into 4ohm or 225 into 8ohm.

    I was told when buying speakers to have the wattage rating about 35% below the rating of the amp. Is there any truth to this?

    Here are the speakers I was thinking of getting following this rule:
    http://www.thomann.de/ie/peavey_pro12_messengerserie.htm

    They are 250w RMS at 4ohm.

    This suits me better as they are quite cheap, but would they be safe to use with this amplifier without any explosions:P,
    any advice would be greatly appreciated!! Thanks!!


Comments

  • #2
    darrenw5094
    Closed Accounts Posts: 2,126 ✭✭✭darrenw5094


    'Headroom' is the key word you will hear experienced sound guys use when talking about speakers and amps. The more powerfull the watts on the amp, the clearer the sound will be. I would suggest that your power amp sound be about 50% more powerfull than what the speaker is rated at. That way, if the speakers are maxed, the power amp still has a lot of power spare. The amp will never over heat, causing feedback, and will probably live a lot longer.

    For example, if your speakers are rated at 400w @ 8oHms, you should power it with an amp that can give about 600w @ 8oHms. Clean headroom will give better sound.

    With regards to bass speakers, it's similar. I made mistakes when buying the first pa. I bought a Crown amp with 400w @ 8oHms to power the top speakers that were the same power rating. The amps were not powerfull enough to power the speakers at full volume.

    Don't worry about too much power, as the limiter you use in the pa, will make sure the speakers only get the exact power that they need.


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