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power amp and 15 driver...sounds really low

Discussion in 'Amps and Cabs [BG]' started by valleybass94, Aug 4, 2012.

  1. valleybass94


    Jul 30, 2012
    hi all, i got a question, i decided to go with a poweramp, bass preamp instead of a pre-made bass head. i havent got my bass preamp yet but i got my poweramp (575 watts per channel@4 ohms and bridged-1570 watts at 4ohms.) and plugged it to my 15" cab. the 15 is a carvin 600watt driver at 4ohms. and i have my bass is an active ibanez soundgear. i didnt know what to expect but i expected to be loud with no eq of course, but its not loud. i tried both, on one side stereo and on bridged and i got just about the same low volume. am i just missing the preamp or do i simply need another cab of speakers??help...
  2. You are missing the preamp to step up your signal to the correct level. As you noticed, an active bass can put some signal into the poweramp, just not nearly enough.
  3. CnB77


    Jan 7, 2011
    yup, this. Even though your bass has a preamp, it's a preamp that just boosts the signal a bit into another preamp. Onboard preamps are pretty much universally not hot enough to properly drive a power amp
  4. valleybass94


    Jul 30, 2012
    ...so once i getmy basspreamp i should be good to go then?.... and shuld i run my amp bridged at 1570 watts @4ohms for my 15cab-600watt @4ohms? or do i run it with 1 channel at 575 watts?
  5. 5port


    Oct 14, 2009
    LI,new yawk
    "or do i run it with 1 channel at 575 watts?"

  6. JimmyM


    Apr 11, 2005
    Apopka, FL
    Endorsing: Ampeg Amps, EMG Pickups
    Dude, hate to break it to you, but if that cab takes anymore than 200-250w without either exploding or sounding like a fartbox, consider yourself lucky. 600w is the wattage it takes to blow the voice coil. You can count on losing at least half that due to other factors like box size, port tuning, and how much lows you're pushing. Seen a lot of people blow cabs and say, "Well they told me I could do it!"

    Common sense goes a long way when running your gear, and if it sounds like it will explode, I don't care what they tell you it'll handle, it will explode.
  7. RickenBoogie


    Jul 22, 2007
    Dallas, TX
    +1 go easy there, you'll have enough power to shred that 15 quick. It'll take maybe 200-250 watts bofore it rips to shreds.
  8. valleybass94


    Jul 30, 2012
    thanks guys, i knew it was a stupid question, 1570watts into 600watts even looks horrible. thanks :)
  9. Yep, you don't want a bar of bridging.

    When you get it all set give it all it can take until it farts out, then lower the bass eq and see how much more it will take. If you lower the bass eq enough you should have enough amp power available to get into trouble with heat instead, at that point you will be hearing little increase in volume as you wind on the loud knob. Capiche?

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