How to use a preamp with my SM400s?

Discussion in 'Amps and Cabs [BG]' started by Cantstandsya, Mar 5, 2002.

  1. Cantstandsya


    Jul 27, 2001
    Fontana, CA
    Does anyone know how I would bypass the preamp section on my 400S and just use the power section with another preamp.There are no preampout /poweramp in jacks.Anyone?
  2. mgmadian


    Feb 4, 2002
    Austin, TX
    Simple solution: use the Effects Return (In) on your SM400. I do this (temporarily) with my brand-new Kern pre-amp and my soon-to-be-on-the-market-once-the-QSC-arrives Eden VT-.40 head.

    Simply run a short patch cable from the Main Out of your preamp into the Effects Return (In) on the SM-400. Now plug your bass into the preamp, and adjust the preamp gain on the preamp, and the power amp gain on the SM-400. The SM400's pre-amp has been bypassed.