What is Gain? Some asked me so here we go.!!

Discussion in 'The Workbench' started by superleadfixer, Dec 8, 2006.

  1. USAPatriot

    USAPatriot New Member

    Joined:
    Mar 22, 2014
    Messages:
    1,883
    Likes Received:
    1,313
    Here's an interesting question. At least to me.
    I have an MXR-108 EQ that I run in the loop of my DSL40C. On one side of the pedal is a slider that says volume. On the other side there's one that says gain. I don't see how the two can be different. What's up with that? -Rod-
     
  2. mickeydg5

    mickeydg5 Well-Known Member VIP Member

    Joined:
    Sep 30, 2011
    Messages:
    16,265
    Likes Received:
    5,581
    Location:
    US of A
    A volume control can be used to describe various types of signal level adjustment.
    A gain control is a type of volume control in that it controls the signal level more or less at the input prior to gain blocks. Lower levels will produce less gain which equates to a lower level signal at the output.

    The M-108 from what I can tell has gain modules for input, each EQ band and output. So raising the dB of the input will increase overall gain of the unit, which may result in more distortion, whereas the volume slider will only affect what is being output post input and EQ gain blocks.
     
    USAPatriot likes this.
  3. USAPatriot

    USAPatriot New Member

    Joined:
    Mar 22, 2014
    Messages:
    1,883
    Likes Received:
    1,313
    That makes at least some sense to me. Could I assume that with the MXR's gain on max, the amount of gain would equal the amount of gain on the amp alone? Volume is basically dry signal pass-thru? -Rod-
     
  4. mtm105

    mtm105 Well-Known Member

    Joined:
    Feb 11, 2014
    Messages:
    3,181
    Likes Received:
    2,446
    Location:
    NW NJ
  5. Leigh

    Leigh New Member

    Joined:
    Aug 31, 2017
    Messages:
    15
    Likes Received:
    10
    GAIN-noun- the amount of voltage amplification in the preamp section of an amplifier. This voltage amplification ultimately drives the power tubes which do not add any more gain. The power tubes add current ( power)
     
  6. BanditPanda

    BanditPanda Well-Known Member

    Joined:
    Oct 19, 2015
    Messages:
    1,597
    Likes Received:
    835
    Location:
    Montreal
    Leigh...that has just confused me ! ( not hard to do ) I thought gain was a term used to describe the over driven or distorted sound which happens when pre amp or power tubes are over driven.
    Most prefer the sound of power amp over drive to pre amp tube over drive.
    When you say ..."power tubes which do not add any more gain "....when power tubes are over driven do they not produce gain i.e. O/D tones ?
    BP
     
  7. Matt_Krush

    Matt_Krush Well-Known Member

    Joined:
    Dec 14, 2015
    Messages:
    639
    Likes Received:
    338
    Location:
    Saginaw MI
    Gain (voltage) = Voltage out/Voltage in

    Distortion/overdrive isn't always an effect of high gain. You can design circuits to go into saturation/cutoff without much 'gain'
     

Share This Page