do you leave an open space when you rack your GK 700RBII?

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

  1. armybass


    Jul 19, 2001
    I racked my GK RB 700II some time ago and just realized that the fan was on top. I had another preamp right on top of it. Anyone else do that or is it suggested to leave an open space on top.
  2. lowfreq33


    Jan 27, 2010
    Endorsing Artist: Genz Benz Amplification
    If the fan's on top, then yes there should be a space.
  3. dave64o

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

    Probably best to leave a space at the top.

    My 1001RBII is in the middle two spaces of a four-space rack and I leave the back cover of the rack off so there's always plenty of room for air to flow through. Other than an occasionally scratchy sounding pot that it had when I first bought it, that amp has been trouble free the entire time I've had it.
  4. GigJones


    Jun 10, 2009
    I do.

    When the manufacturer recommends leaving one rack space (1.75”) clearance above the unit (page 4, 700RB-II & 1001RB-II Owner’s Manual), then you should do it. They designed and built the thing – they know best.
  5. georgestrings

    georgestrings Inactive

    Nov 5, 2005

    IME, it depends on how deep the preamp is - I had my 700rb-II racked with a Korg DTR-2000 tuner directly above it, which covered less than 1/4 of the fan opening, and I never had any problems...

    IIRC, the manual for the 700rb specified 1/2" of fan clearance - one of my 700rb-IIs has been in this SKB 2U rack for years, and has never given me any troubles:

  6. armybass


    Jul 19, 2001
    A very big thanks folks for the replys....I just totally missed the fan when i was racking it...don't know how I missed that. Not only did I put a preamp on top of it...I put either an Alembic F1-X that totally covered it or an Ampeg pre with multiple tubes in it.... Ummmmm, needless to say I was having a few problems with the rack..... which I think actually were due to the preamps getting warmed up as opposed to the GK giving me problems.
  7. George, who makes the tuner that's plugged into the top right 700RB II amp - and does it track bass well, easy to see in sunlight?
  8. wcriley


    Apr 5, 2010
    Western PA
    Actually, your problem was likely caused by the fan drawing the heat from the preamp tubes into the G-K.
  9. georgestrings

    georgestrings Inactive

    Nov 5, 2005
    That's a Korg Pitchjack - it tracks pretty well, even down to low A... Regarding sunlight - I don't know, but I'll try it out on our next sunny day, and let you know... My gut feeling is, sunlight will be a hindrance - but then, it is to most tuners without an LCD display...

    - georgestrings
  10. Loel

    Loel Blazin' Acadian

    Oct 31, 2004
    I rack mine in a two space wood case,with a space cut out
    over the fan area,attached a small piece of grill material
    over the cut out for a clean look,sorry not vsable in this pic..

    Attached Files:

  11. tdub0199


    Mar 4, 2010
    Atlanta, Ga.
    I leave an empty space above my 1001RB II....