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Ohms

Discussion in 'Amps and Cabs [BG]' started by Steve S, Jul 22, 2001.


  1. Steve S

    Steve S

    Jul 26, 2000
    I have an old Peavey Century 120 amp. It has two input jacks in the back with 4 ohm stamped on them. Can I plug in my Bag End S15D? It's an 8 ohm speaker.
     
  2. JMX

    JMX Vorsprung durch Technik

    Sep 4, 2000
    Cologne, Germany
    That should be ok. You just should connect a speaker load with less than 4 ohms.
     
  3. EString

    EString

    Nov 20, 2000
    Los Altos, CA
    I think what JMX meant to say is "you shouldn't connect any speaker that is less than 4 ohms."
     
  4. JMX

    JMX Vorsprung durch Technik

    Sep 4, 2000
    Cologne, Germany
    Oops, yeah, typos at 3 AM, I should get some sleep :D
     
  5. Steve S

    Steve S

    Jul 26, 2000
    I'm not sure about the ohms of the Peavey cabinet. It's also a 15. Can I plug in my Bag End at the same time?
     
  6. EString

    EString

    Nov 20, 2000
    Los Altos, CA
    Is "4 ohms" written over each input jack, or is there just one "4 ohms" written for both jacks?
     
  7. Aaron

    Aaron

    Jun 2, 2001
    Bellingham, WA
    if the speaker is an 8 ohlm speaker (it probably is), then you can add an other 8 ohlm speaker to make 4 ohlms.
     
  8. Steve S

    Steve S

    Jul 26, 2000
    It has "4 ohms" stamped for both jacks.
     
  9. The jacks are in parallel if it just has "4 ohms" printed once over the pair of jacks. The combined load should be 4 ohms or greater, with 4 ohms giving full power.

    (2) 8 ohm cabs in parallel will be a 4 ohm load.

    Plug (1) 8 ohm cab into a jack = legal, but only half power.

    Plug (2) 8 ohm cabs into the jacks = legal, full power.

    Plug (1) 4 ohm cab into 1 jack = legal, full power

    Don't plug in another cab, be it 8 or 4, if you already have a 4 ohm load on a jack.

    Dig? :D

    Chris
     
  10. Steve S

    Steve S

    Jul 26, 2000
    Thanks for the replies guys. I now understand what I can do with my speakers.