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Cab Configuration and wattage

Discussion in 'Amps and Cabs [BG]' started by Happy MurphDay, Jan 13, 2005.


  1. Happy MurphDay

    Happy MurphDay

    Mar 9, 2004
    around
    I am looking at completing my rig and I have a few questions:

    I am looking at cabs with mismatched speakers and something is puzzling me...

    **example**
    If a cab like the berg 322 has 2 10s and a 12 and each 10 can take 100 watts, and the 12 can take 200 watts, the total of the cabs watts are 400, but shouldn't it be advertised as a 300 watt cab because even though the 12 can take 200, dosen't the tens limit the 12s power?
     
  2. IvanMike

    IvanMike Player Characters fear me... Staff Member Supporting Member

    Nov 10, 2002
    Middletown CT, USA
    not necessarily. the 2 tens could be 16 ohm speakers wired in parallel with an 8 ohm 12 resulting in a net 4 ohm load. IIRC, the tens and the twelve get teh same frequencies.

    where cabs run into trouble is rating multiway enclosures. Back in the day a popular company had a 3 way speaker with a fifteen rated at 250 watts, a ten rated at 150 watts, and a horn tweeter. The 15 got all the lows and the 10 got the mids. The cab was rated at 400 watts. problem was, in the real world those watts were being used to amplify the lower frequencies and the 15's were being blown all the time.
     
  3. Happy MurphDay

    Happy MurphDay

    Mar 9, 2004
    around
    thanks, I have another question,
    would it be safe/worth it to run this scenerio?:
    6x10 and a 2x10, both 8 ohm and a 1000 watt 4ohm head:
    total the 8 10s could handle 1000, but would the 2x10 get 500 watts and blow while the 6x10s 500 watts not be loud?(yes i know 500 watts and a 6x10 would be loud, im just using the example watts)
     
  4. IvanMike

    IvanMike Player Characters fear me... Staff Member Supporting Member

    Nov 10, 2002
    Middletown CT, USA
    i've never gone that extreme. many of us have used an 8 ohm 4x10 and 8 ohm 2x10 with good results. both cabs get equal wattage as long as they are the same impedance.
     
  5. Happy MurphDay

    Happy MurphDay

    Mar 9, 2004
    around
    well im looking imparticulary at a mesa rr1516b, which has a 15, a 10, and 2 6's, im thinking of upgrading and i found on used at a good price, and the thought of adding another cab if its not enough, like a rr18 or a rr 2x10 on top paired with a 400+, I was just thinking in general and was looking for some answers
     
  6. Happy MurphDay

    Happy MurphDay

    Mar 9, 2004
    around
    so if you had a 2 ohm capable head, and a 8ohm 4x10 and a 4ohm 2x10, each "pair" of tens should get equall wattage and be equall in volume, the sense of each pair of tens(think of dividing the 4x10 in half)