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Hi-Gain, Lo-Gain?

Discussion in 'Amps and Cabs [BG]' started by dukeandrews, Mar 17, 2014.

  1. dukeandrews


    Jan 24, 2014
    I just picked up a 1970s Ampeg B-110 120 w 8ohms and it has a "Hi Gain" input and "Lo Gain" input. What is the difference? I have noticed the lo gain is warmer and louder. Can I do damage to the speaker by playing my passive P bassin the lo gain input? There is also a three way switch at the top of the control panel that says "300 hz 800 hz 3000hz" What does this mean? There is also a two way switch next to that that says "Ultra Hi." I'm not sure what that means either. I cannot find much info about this amp online. I guess it was not very popular. It is pretty big for a combo amp. Thanks for any help!:)
  2. Guessing the hi gain would be for active basses & will cut maybe 12db from the signal. I switch between active & passive in a set & being able to plug the active into a padded input helps to make the switch easier with a minimum of volume adjustments. It won't hurt the speaker for you to play a passive bass through the lo gain input.
  3. The ultra high will boost higher frequencies.
  4. JimmyM


    Apr 11, 2005
    Apopka, FL
    Endorsing: Ampeg Amps, EMG Pickups
    The B110 wasn't as popular as their tube amps so there's not as much about it around. But the hi gain/lo gain thing is pretty much what bachlover said, an early version of active and passive inputs. And you can plug any bass into either input..choose the one that has the sound you like best.

    The "300 hz 800 hz 3000hz" is the first part of the famous Ampeg mid control. You select the frequency center that you like best and use the mid knob to adjust it. Turn the mid knob up and down all the way at the different frequencies to hear what it does then decide which you like best. I prefer 800hz but used to use 3000hz a lot when I was a kid.
  5. dukeandrews


    Jan 24, 2014
    Thank you gentlemen. Now to just find that rattle...