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GK 2001RB and GK NEO 412 Cab

Discussion in 'Amps and Cabs [BG]' started by SuperMegaChrist, Feb 10, 2014.

  1. SuperMegaChrist


    Feb 10, 2014
    Hi everyone,

    I got the GK Neo 412 cab about two years ago. I used the GK 700RB II amp with it for about a year and a half with no issues until I damaged 3 speakers. I was told by the repair tech that the amp was underpowered (480 watts) for the cab which could handle 1200 watts. He figured I was pushing the amp so hard, it would send a distorted signal, damaging the speakers. He recommended a more powerful amp. I asked him if the 2001RB would be fine and he said yes.

    I bought the 2001RB and for about two months of using it, I was in heaven. Then, I damaged 2 more speakers. I replaced them myself. Again, about 3 months later (present day), 2 more speakers damaged. Now I'm wondering if pairing the 2001RB with the Neo 412 is a good idea.

    Am I doing something wrong? I'm on my way to paying for my cab twice. I've read here and in other forums of people using the Neo 412 with the 2001RB, and even the 1001RB II but have yet to encounter anyone dealing with the same issues I am.

    Some details on my setup:
    2001RB to Neo 412 in Bridge Mode, following instructions from manual.
    Using GK Speakon cable the cab came with which allows for bi-amp operation.
    -10 dB Pad is engaged.
    EQ is flat (12 o' clock positions)
    4 string ESP tuned to drop B.
    Sans-Amp 3 channel bass driver with light to medium distortion, connected in front of the amp (not via effects send/return).

    Hopefully someone can shed some light on my situation. I love the GK sound but hating the problems I'm having.
  2. Tractorr


    Aug 23, 2011
    Are you playing fairly loudly? A low B can damage speakers pretty easily if you aren't careful with volume.

    Also, were you using the 4/5 string button in the 5 string position? That acts as a bass boost.
  3. SuperMegaChrist


    Feb 10, 2014
    I set my volume less than half way, I guess it would be 4. Loud enough to be heard along 2 high gain guitars. The 4/5 String button is set to 4, although I also play on my 5 string bass (also tuned to B) from time to time and is really the only time the button is engaged to 5 string. The woofer control I set to around 2 and I usually leave the boost off.
  4. GK's amps are pretty loud and much powerful than they seem.
    I don't bridge my 2001RB because it's already loud enough.
    It sounds like your bass might be the culprit.

    If your pickups are too close to your strings, it can make your speaker do a popping noise and tends to make speakers flap pretty violently.

    Another is your EQ section:
    Like Tractorr said, make sure the 4/5 string button is set to 4 string.
  5. elwuss


    Feb 24, 2013
    Zagreb, Croatia
    if i'm not mistaken, GK amps are not FLAT when you put the EQ all at 12 o'clock
  6. Well I can tell you it's not the 2001RB (since it happened with a different amp) and it's not your cab either (because if the original speakers were faulty, when you replaced the ones that blew it should have fixed the problem). I have a neo 412 and a 2000RB and I have cranked it in bridge no problem, it's pants flapping stupid loud. Just for the heck of it I even once stuck my hand through a port (after disconnecting amp) after playing for a while to see if the speakers were hot, THEY WEREN'T :bassist:

    Dunno, man. Did you get the cab new?
  7. You might benefit from a Fdeck (HPF) high pass filter.
    I'm thinking about buying one myself.

    Also, after being on talkbass, there's no under powering cabs.
    I use to believe in matching ratings or watts was ideal but
    I played through my GK MB200 amp into my GK NEO 412. Nothing happened!
  8. CL400Peavey

    CL400Peavey Supporting Member

    Nov 7, 2011
    Grand Rapids Michigan
    Well your tech is an idiot. You cant underpower a cab.

    Infact you were over powering it in both cases. Repair your 412, then get a second to runn off your 2001.
  9. somegeezer


    Oct 1, 2009

    If I had anyone tell me that, I would laugh myself sore, all the way back home.
  10. BassMonstrum


    Mar 7, 2008
    Actually, if he works at the same shop as the OP bought the 2001rb, he's pretty smart. "You need to buy THIS! from us."
  11. Dave W

    Dave W Supporting Member

    Mar 1, 2007
    White Plains
    Hey now! Nothing wrong with GK or the 2001RB, it's a killer head.
  12. CL400Peavey

    CL400Peavey Supporting Member

    Nov 7, 2011
    Grand Rapids Michigan
    It isnt the amp that is the problem. Or the cab. It is in application, and the advice of a poor tech.

    The OP should add a second, or 3rd-4th 412 to gain more volume.
  13. Chef

    Chef Moderator Staff Member Supporting Member

    May 23, 2004
    Columbia MO
    Staff Reviewer; Bass Gear Magazine
    "underpowered:" Street Myth. Your tech is lame. Sorry.

    You may have over-eq'd the speakers to death though, if you're really adding a lot of bass.

    An f-deck HPF would be good for you, if you are boosting a lot of bass, as you an trim out all the sub-sonic stuff that's not needed, but can cause over driver excursion
  14. Vic Winters

    Vic Winters Supporting Member

    Apr 20, 2006
    Rochester, NY
    How aggressive do you play?
  15. AdamR

    AdamR Supporting Member

    Sep 24, 2007
    Bethel CT
    Endorsing Artist: VF Cables, Dirtbag Clothing
    If the bass is active how do you have the basses eq set ? Is the bass knob cranked ?
  16. Dave W

    Dave W Supporting Member

    Mar 1, 2007
    White Plains
    Post #10 eludes otherwise, which is what I was replying to
  17. SuperMegaChrist


    Feb 10, 2014
    Brand new.
  18. SuperMegaChrist


    Feb 10, 2014
    I think he knew more about replacing speakers. Unfortunately, I was not any smarter and bought into a new head.
  19. CL400Peavey

    CL400Peavey Supporting Member

    Nov 7, 2011
    Grand Rapids Michigan
    There is nothing wrong with any of the gear you have. It just isnt meeting your needs.

    The 2001RB can power a second 412 cab. That will give you more volume.
  20. SuperMegaChrist


    Feb 10, 2014
    Pretty aggressive, I suppose. Metal.

    Active bass, high, mid, low not cranked at all. I handle my eq on the Sans-Amp. As I recall, bass is not cranked too high.