Line 6 MM4 DL4 Volume Fix (Documented)

Discussion in 'Effects, Pedals, Strings & Things' started by drgonzoguitar, Jan 23, 2008.

Page 1 of 2
  1. Jan 23, 2008 #1
    drgonzoguitar

    drgonzoguitar Member

    Messages:
    4,710
    Joined:
    Aug 23, 2007
    Location:
    Twin Cities
    I have read on this board how to fix the volume drop on the Line 6 MM4/DL4 Modeler pedals. I finally decided to crack mine open and do it. I documented (with pictures) the procedure here:

    http://royfinley.com/?page_id=1262

    Hope this helps the quest for tone...
     
    Last edited: Aug 8, 2015
    drgonzoguitar, Jan 23, 2008
    drgonzoguitar, Jan 23, 2008
    #1
  2. Jan 23, 2008 #2
    Angle Loss

    Angle Loss Supporting Member

    Messages:
    1,497
    Joined:
    Oct 18, 2004
    Location:
    Orange County, CA
    I don't have a DL-4 anymore (gone to Eventide), but I wanted to congratulate you on the excellent tutorial on this project. I believe many people can benefit from it. I wish that I had been able to do the volume drop mod when I had it. The TL072 (in my opinion) would not need to be replaced--in fact, I like the sound of them better than the Burr Brown opamps. Those RF caps and gain resistors would be a must! Again, great photo essay (and funny too!).
     
    Angle Loss, Jan 23, 2008
    Angle Loss, Jan 23, 2008
    #2
  3. Jan 23, 2008 #3
    clothwiring

    clothwiring Supporting Member

    Messages:
    6,729
    Joined:
    Jan 26, 2006
    Location:
    Central NY
    When I had my DL-4 I just switched it so that it decayed the delay after turning it off and that seemed to "fix" the volume issue. Plus being in that mode always made more sense to me. I forget what it's called but we've talked about it here before.
     
    clothwiring, Jan 23, 2008
    clothwiring, Jan 23, 2008
    #3
  4. Jan 23, 2008 #4
    drgonzoguitar

    drgonzoguitar Member

    Messages:
    4,710
    Joined:
    Aug 23, 2007
    Location:
    Twin Cities
    I might have to pick up a DL4. I love my BOSS DD-20, so I have not felt a need to get the DL4. I use my MM4 in my pedal board for 99% of the gigs I play, so something had to be done.

    I always hated the volume drop you get when using a distortion in the MM4. If you turn the effect all the ways up, you would get massive flange/chorus/vibe stuff---but no volume drop. I like to use my MM4 in my effects loop. I also like flange and phase effects to be subtle. Now I can get subtle without a 6dB drop in volume.

    Thanks for the comments.
     
    drgonzoguitar, Jan 23, 2008
    drgonzoguitar, Jan 23, 2008
    #4
  5. Jan 23, 2008 #5
    WarofGhosts

    WarofGhosts Member

    Messages:
    251
    Joined:
    Dec 11, 2006
    Location:
    Wilmington, NC
    Glad you documented it since it seems like every time I have posted these instructions nobody has seemed to pay attention.
     
    WarofGhosts, Jan 23, 2008
    WarofGhosts, Jan 23, 2008
    #5
  6. Jan 23, 2008 #6
    mild

    mild Member

    Messages:
    2,117
    Joined:
    May 11, 2006
    Location:
    Bottom of the World
    Is this the same as the "Keeley/Tripps Mods"?
     
    mild, Jan 23, 2008
    mild, Jan 23, 2008
    #6
    drgonzoguitar likes this.
  7. Jan 23, 2008 #7
    drgonzoguitar

    drgonzoguitar Member

    Messages:
    4,710
    Joined:
    Aug 23, 2007
    Location:
    Twin Cities
    I had to dig through the archives to get them. Some people on a effect mod board were curious how to fix this. I had saved it somewhere and finally decided to do the mod. I will eventually change the LEDs to make the MM4 uber-hip.
    :)
     
    drgonzoguitar, Jan 23, 2008
    drgonzoguitar, Jan 23, 2008
    #7
  8. Jan 23, 2008 #8
    drgonzoguitar

    drgonzoguitar Member

    Messages:
    4,710
    Joined:
    Aug 23, 2007
    Location:
    Twin Cities
    I believe so. I am not 100% for sure. I do know that the volume drop problem is now gone.
     
    drgonzoguitar, Jan 23, 2008
    drgonzoguitar, Jan 23, 2008
    #8
  9. Jan 23, 2008 #9
    bduguay

    bduguay Member

    Messages:
    1,205
    Joined:
    Jun 16, 2006
    Location:
    Ontario, Canada
    I did this mod for a guy. The results were as if someone removed the heavy wool blanket that draped over the amp. The owner was certainly happy.
    B.
     
    bduguay, Jan 23, 2008
    bduguay, Jan 23, 2008
    #9
  10. Jan 23, 2008 #10
    WarofGhosts

    WarofGhosts Member

    Messages:
    251
    Joined:
    Dec 11, 2006
    Location:
    Wilmington, NC
    Its the Tripps designed mods.
     
    WarofGhosts, Jan 23, 2008
    WarofGhosts, Jan 23, 2008
    #10
    drgonzoguitar likes this.
  11. Jan 23, 2008 #11
    Mincer

    Mincer Member

    Messages:
    3,406
    Joined:
    Nov 25, 2006
    Location:
    Tampa Bay area, FL USA
    Is there a part number for the LEDs? I have to replace a few switches in my DL4, so I might as well geek it out.
     
    Mincer, Jan 23, 2008
    Mincer, Jan 23, 2008
    #11
  12. Jan 23, 2008 #12
    drgonzoguitar

    drgonzoguitar Member

    Messages:
    4,710
    Joined:
    Aug 23, 2007
    Location:
    Twin Cities
    drgonzoguitar, Jan 23, 2008
    drgonzoguitar, Jan 23, 2008
    #12
  13. Jan 24, 2008 #13
    Mincer

    Mincer Member

    Messages:
    3,406
    Joined:
    Nov 25, 2006
    Location:
    Tampa Bay area, FL USA
    Mincer, Jan 24, 2008
    Mincer, Jan 24, 2008
    #13
  14. Jan 24, 2008 #14
    drgonzoguitar

    drgonzoguitar Member

    Messages:
    4,710
    Joined:
    Aug 23, 2007
    Location:
    Twin Cities
    I know the MM4 LEDs are 3mm. I am not for sure about the DL4 (I do not own it).
     
    drgonzoguitar, Jan 24, 2008
    drgonzoguitar, Jan 24, 2008
    #14
  15. Jan 24, 2008 #15
    WarofGhosts

    WarofGhosts Member

    Messages:
    251
    Joined:
    Dec 11, 2006
    Location:
    Wilmington, NC
    I'm pretty sure all of the line 6 4 stompswitch modelers are 5mm leds.
     
    WarofGhosts, Jan 24, 2008
    WarofGhosts, Jan 24, 2008
    #15
  16. Jan 24, 2008 #16
    Mincer

    Mincer Member

    Messages:
    3,406
    Joined:
    Nov 25, 2006
    Location:
    Tampa Bay area, FL USA
    They are definately bigger than the Boss LEDs. When choosing LEDs, are there any specs to consider?
     
    Mincer, Jan 24, 2008
    Mincer, Jan 24, 2008
    #16
  17. Jan 24, 2008 #17
    drgonzoguitar

    drgonzoguitar Member

    Messages:
    4,710
    Joined:
    Aug 23, 2007
    Location:
    Twin Cities
    No...they are 3mm. See the comparison photo with a 5mm in my hand. I think a 5mm would fit!

    [​IMG]
     
    drgonzoguitar, Jan 24, 2008
    drgonzoguitar, Jan 24, 2008
    #17
  18. Jan 24, 2008 #18
    drgonzoguitar

    drgonzoguitar Member

    Messages:
    4,710
    Joined:
    Aug 23, 2007
    Location:
    Twin Cities
    Your forward voltage should be over 3.2V and reverse current less than 30mA, but most LEDs fit this description. It is how bright you want it.

    Luminous Intensity(mcd) : 4000(Typical) ~ 5000(Max) [...or bright to "blind me"]
     
    drgonzoguitar, Jan 24, 2008
    drgonzoguitar, Jan 24, 2008
    #18
  19. Jan 24, 2008 #19
    WarofGhosts

    WarofGhosts Member

    Messages:
    251
    Joined:
    Dec 11, 2006
    Location:
    Wilmington, NC
    Yep you are right. Just looked at my DL-4 and damn if it ain't 3mm. I swear I thought they were 5mm....
     
    WarofGhosts, Jan 24, 2008
    WarofGhosts, Jan 24, 2008
    #19
  20. Jan 24, 2008 #20
    Mincer

    Mincer Member

    Messages:
    3,406
    Joined:
    Nov 25, 2006
    Location:
    Tampa Bay area, FL USA
    3mm they are!! Now, what color to pick?
     
    Mincer, Jan 24, 2008
    Mincer, Jan 24, 2008
    #20
Page 1 of 2

Share This Page