1. Please take 30 seconds to register your free account to remove most ads, post topics, make friends, earn reward points at our store, and more!  
    TalkBass.com has been uniting the low end since 1998.  Join us! :)

Speaker problems? Pt. 2 Ampeg B25B 2x15

Discussion in 'Amps and Cabs [BG]' started by Jords1984, Mar 23, 2014.

  1. Jords1984


    May 30, 2008
    Asheville, NC
    So my other cab is busted right now, too. Long story short, I let a band use my Ampeg B25B. It's rewired from 16ohms to 2ohms (my GK1001RB is good for it). Dude's amp was 4ohms, and midway through their set, my cab dies. No sound. Nothing. Until after this incident, I was not very knowledgable on resistance. To be fair, I'm still not. But I know a lot more now than I did then, and which means I know that I made a bad call when I let them run a 4ohm amp through my 2ohm cab.

    So, burning question: what should I replace my speakers with? Any and all suggestions would be greatly accepted.
  2. Test the cab again with your amp.

    If anything, sounds like the guy killed his own amp (4 ohm head run at 2 ohms = fried head).
  3. Jeff Scott

    Jeff Scott Rickenbacker guru.......... Supporting Member

    :D :bassist: That band won't be asking to borrow gear, anymore!
  4. a 16 ohm, 2 speaker cab CAN'T be wired for 2 ohms.

    If it is 2 8 ohm speakers in series, running them instead in parallel fashion would yield a 4 ohm cabinet.
  5. Good catch
  6. Ditto. If the speakers were original and are indeed blown, it s probably from being over powered. The old CTS speakers do not handle much power. My B25b protested loudly when I tried it w/ my SVT.
  7. Jords1984


    May 30, 2008
    Asheville, NC
    Interesting! I did not rewire it myself (obviously), this is simply what the guy who did it for me told me. Weird.

    Anyway, that definitely changes things a bit and would explain why it happened so quickly.

    Also, it's definitely my speakers that don't work. Tested my amp on it right after and a few days later, still no boom-boom.