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Advice on adding bass bins to my passive speaker PA system

  • 24-01-2017 8:01pm
    #1
    Comer1
    Registered Users, Registered Users 2 Posts: 1,100 ✭✭✭


    Hi

    I currently have a pair of peavey messenger pro 15 mkii 8 ohm speakers which I think are rated at 300w each. Powering these is a Thomann TA 2400 rated at 2x 1200 W @ 4 Ohm, 2x 650 W @ 8 Ohm. I want to add a pair of bass bins but am unsure of what I should be looking for.

    Am I correct on saying that at 4ohms, I should not have speakers that exceed 3/4 the power output of the amp, that is 1800w for the total of the tops and bins?

    So should I be looking for two 600w bins at 8 ohms if I plan on running a cable from the amp to a bin and then into the top speaker (ie, in parallel) so that the impedance is 4 ohms per side?

    I'm using the PA for vocals and a full backing track with bass and drums and a microphone up to an electric guitar amp. Also, do I need to worry about crossover or will most bass bins have one built in?

    As can be guessed from my post, I'm really clueless about this so any help greatly appreciated.


Comments

  • #2
    godfrey
    Registered Users, Registered Users 2 Posts: 417 ✭✭godfrey


    The power of the speakers doesn't matter. 2 x 8ohm speakers in parallel will result in a 4ohm load, which is ideal for your amp. Unfortunately a full-range signal will also go to your bass bin, and may sound like pants! Ideally, find a pair of bins with a passive crossover inside, which will give a hi-pass output for the speakers you already have. They're not all that common and it's a crude method but much better than no crossover.

    g


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