/ Register

Sansamp RBI & GK powered cab

Discussion in 'Amps and Cabs [BG]' started by Tarheel73, Jul 11, 2013.

  1. Jul 11, 2013 #1
    Tarheel73

    Tarheel73

    Apr 21, 2013
    Has anyone tried to run one of the Gallien Krueger MBP Powered cabs with a Sansamp RBI or RPM, if it works and sounds good this would be exactly what i am looking for, i just dont really have any way to try it out. Hoping that someone on here has, thanks
     
  2. Jul 11, 2013 #2
    raphaeldc

    raphaeldc

    Mar 24, 2010
    Porto, Portugal
    I've heard that these powered cabs will only work with GK combos, via a dedicated XLR output. Not sure though...
     
  3. Jul 11, 2013 #3
    Joe Louvar

    Joe Louvar

    Jun 6, 2011
    Santa Rosa, CA USA
    I don’t think the Sansamp will work very good - the GK powered cabs need a true balanced feed.
     
  4. Jul 11, 2013 #4
    majortoby

    majortoby

    Jul 2, 2009
    Tampa, Fl USA
    I thought some of the sansamp had a balanced XLR out? At any rate, something like a ART tube MP could be used to generate a balanced XLR out without generating too much additional noise :)
     
  5. Jul 11, 2013 #5
    B-string

    B-string

    Nov 21, 2008
    Lake Havasu City, Az USA
    The output of the Sansamp would need to be true balanced at +10db to drive the powered MBP. +10db is a pretty hot signal level.
     
  6. Jul 11, 2013 #6
    majortoby

    majortoby

    Jul 2, 2009
    Tampa, Fl USA
    Just going to throw it out there once more. The ART tube MP has a maximum XLR output of 28DB. So, it could drive the **** out of the GK powered cab, unless I've missed something completely.
     
  7. Jul 11, 2013 #7
    tech21nyc

    tech21nyc Commercial User

    Aug 17, 2010
    Manufacturer: Tech 21
    Our RPM/RBI are configured with a balanced XLR line level output. We've measured it at 3.6V rms.

    I'm not sure where you guys are getting the +10dB to drive these cabs as I found nothing in the MBP manual to suggest that. You might want to contact GK directly as there is not enough information in that manual to explain how exactly these cabs work.

    My guess is that the XLR input on the MBP's is possibly communicating digitally between the MB series heads and these cabs.
     
  8. Jul 11, 2013 #8
    B-string

    B-string

    Nov 21, 2008
    Lake Havasu City, Az USA
    The balanced +10 db signal level came from Robert A Gallien. The MBP are self powered cabs w/o a preamp. I don't remember if Mr Gallien referenced what voltage level.
     
  9. Jul 13, 2013 #9
    Tarheel73

    Tarheel73

    Apr 21, 2013
    Thanks for all the replies, I really wish that would work, I love my RBI, and a powered cab would be perfect for me, somebody should really start making powered cabs that will work with any pre amp
     
  10. Jul 13, 2013 #10
    B-string

    B-string

    Nov 21, 2008
    Lake Havasu City, Az USA
    Well is "appears" it may have sufficient drive for the MBP cabs. The unknown is what voltage the +10 db is referenced to.
     
  11. Jul 18, 2013 #11
    tech21nyc

    tech21nyc Commercial User

    Aug 17, 2010
    Manufacturer: Tech 21
    GK specifically states that the MBP cabs are only to be used with their MB amplifiers:

    I emailed them to ask if they could be used with external preamp's XLR output and received the following answer:

    My suggestion would be to contact them by phone before purchasing an MBP for use with a non GK product or try one locally.