Max. volume from GK MB150

Discussion in 'Amps and Cabs [BG]' started by gtt5, Apr 15, 2012.

  1. gtt5


    Apr 15, 2012
    I have a Gallien Krueger MB150S III and am wondering what kind of cabinet is best to use as an extension, if maximum volume is the priority?

    Any advice much appreciated.
  2. ricguy


    Jul 22, 2006
    Syracuse, NY
    Use one that is 8-ohm impedance and that's efficient (high sensitivity, like >100dB).

    I used an early GK Micro 150E head with two Eden D210t cabinets for years in a LOUD blues trio (guitarist who toured briefly w/the Nighthawk and w/Debbie Davies, and the original drummer from the Robert Cray Band) and never had a problem with keeping up with those guys w/o p.a. support.

    The only issue I had with that amp is it would sometimes shut-down momentarily when it got hot running at 4-ohms. I took care of that by using a small clip-on fan, blowing at the side of it where the vent is and across the cooling fins, to help keep it cool.
  3. RickenBoogie


    Jul 22, 2007
    Dallas, TX
    If it's the 1x12 combo, a matching 112 is the best match every time.
  4. seamonkey


    Aug 6, 2004
    In this case, the MB150S is a sealed 12" with a foam surround. It's very rare to see this because it's more of a HiFi design feature than pro-sound.

    If getting the maximum volume is the priority, then don't use the built-in driver.
    Just use an external cabinet. The 150w is plenty to get good volume out of a decent cabinet. But you could also pick up a new GK combo with a lot more volume for a lot less $$$ than you can a matching cabinet for the MB150S-112III
  5. klyph

    klyph Supporting Member

    Mar 28, 2009
    Cape Cod
    I've seen a local guy here use a Bag End S-15 as an ext. (maybe alone w/ the 12" unplugged?) and it sounded killer. But this was MOR with amplified acoustic, drum machine, etc. I doubt if it would keep up with a loud rock drummer.
  6. dave64o

    dave64o Talkbass Top 10 all time lowest talent/gear ratio! Gold Supporting Member

    Like seamonkey suggested, turn off the switch for the internal speaker and connect either a bigger (2x10? 2x12? 4x10? Etc?) 4-ohm cabinet or even two bigger 8-ohm cabinets.

    I did that once in a while with my two Dr. Bass 1x12's and got some decent volume out of the amp that way. I'd guess that with a pair of larger 8-ohm cabinets, especially if they were pretty efficient, you could probably move enough air to get some surprising volume out of it.
  7. Hammertime3


    Apr 23, 2008
    I also have one and bought a "like new" SB112 Avatar 8 ohm to help it out and it seems to be a good match.

    I can never figure out why these amps are so expensive for no more power than they have. I also have the MB200 with two GK 12's and it's all I need for what I do. Why do they cost so much compared to the other GK combo's??