Psst... Ready to join TalkBass and start posting, make new friends, sell your gear, and more?  Register your free account in 30 seconds.

Add another amp?

Discussion in 'Amps and Cabs [BG]' started by Nomadic Herder, Oct 7, 2001.


  1. Currently I have the Ampeg B3158 combo. My friend also has it but he is looking to sell his. If I bought it would there be a noticeable volume/sound difference when running the two together? Thank you.
     
  2. JMX

    JMX Vorsprung durch Technik

    Sep 4, 2000
    Cologne, Germany
    It'll give you an increase in volume of about 3 dB, which isn't that much really.

    I'd think you'll fare better with a new head and cab.
     
  3. superphat

    superphat

    Sep 30, 2001
    could you please explain why that is?
    i would assume it would be twice as loud...

    thanks.
     
  4. Oh...ok. The one amp is fine. I was just wondering if two would be better.
     
  5. JMX

    JMX Vorsprung durch Technik

    Sep 4, 2000
    Cologne, Germany
    taken from: http://hyperphysics.phy-astr.gsu.edu/hbase/sound/db.html

    As the last paragraph says you need 10 times the power to get double volume.

    When you double the intensity (power of your amp):

    10 log10 [2 I(0)/I(0)] = 10 log10 [2] = 3 dB
     
  6. Oysterman

    Oysterman

    Mar 30, 2000
    Sweden
    But with the second combo, you will also double the speaker area, right? Twice the power AND twice the speaker area WILL make a difference!
     
  7. JMX

    JMX Vorsprung durch Technik

    Sep 4, 2000
    Cologne, Germany
    ok, that will add maybe another 3 dB
     
  8. jcadmus

    jcadmus

    Apr 2, 2000
    Plus which, it'll look really cool all stacked up!

    :D
     
  9. Hmm...well if for nothing more, then Ill be able to cover more area with sound. If I set one up on one side of a stage and the other on the other side, I'd get more coverage? (I cant think of a better word)

    And how would I be able to run both amps at once? Could I get a cable with one plug on one end and 2 on the other end?
     
  10. If you are not using the effects loop, the easiest way to connect them is run a shielded cable from the effects send of amp 1 to the effects return of amp 2. Plug your guitar into amp 1. The controls on preamp 1 will be active and the master and balance controls on both amps will be active. The pre-amp controls on amp 2 should not be active.