Combo Amps

Discussion in 'Amps and Cabs [BG]' started by free4rm, Feb 23, 2004.

  1. free4rm


    Feb 23, 2004
    Ok, a couple of questions about combo amps and their impedance. Which is the better choice as far as going with 4 ohms or 8 ohms when using both active and passive eq on a bass? For example, I have an Ibanez BTB 400QTM with 18 volt active eq, a Washburn and Fender P-bass (both with passive eq). How does the impedance effect the overall tonal qualities if any? Any help is appreciated.
  2. seanm

    seanm I'd kill for a Nobel Peace Prize! Supporting Member

    Feb 19, 2004
    Ottawa, Canada
    The 4 and 8 ohms impendance would refer to the speaker output, not the bass input. Most amps have a passive and an active input (may also be called high and low gain amoung other things), but all the active input does is lower the signal. So plugging a passive bass into the active jack means that the bass might be too quiet (some people do this on purpose with really hot passive pickups). Plugging an active bass into the passive input will overdrive the preamp.