GK MB-115 1st generation - How do I pull the grille off ?

Discussion in 'Amps and Cabs [BG]' started by 4Mal, May 29, 2019.

  1. 4Mal

    4Mal Gold Supporting Member

    Jun 2, 2002
    Columbia River Gorge
    Safely ;-)

    I want to pull the driver and check for liner/stuffing. I suspect it is bare...

    Thanks!
     
  2. Passinwind

    Passinwind I know nothing. Commercial User

    Dec 3, 2003
    Columbia River Gorge, WA.
    Owner/Designer &Toaster Tech Passinwind Electronics
    A Hilti hammer drill is the time honored solution. HTH...[​IMG]
     
    S-Bigbottom likes this.
  3. BassmanPaul

    BassmanPaul Inactive

    Does the cabinet have handles that you can remove to take a look inside?
     
  4. If this is the first generation MB-115 combo, just remove two screws on each side. Then hook a large allen wrench through the grill at one corner and pull. You may need to do this at two corners before it comes free. When you install the grill make sure those screws are in pretty tight to avoid grill vibration.
     
    nolezmaj likes this.
  5. 4Mal

    4Mal Gold Supporting Member

    Jun 2, 2002
    Columbia River Gorge
    Thanks!
     
  6. 4Mal

    4Mal Gold Supporting Member

    Jun 2, 2002
    Columbia River Gorge
    Sweet! Cab was bare as expected. Now has 1 layer of poly batting. I’m going to button it up in the morning and gig it tomorrow night. Then decide another layer or not...
     
  7. Passinwind

    Passinwind I know nothing. Commercial User

    Dec 3, 2003
    Columbia River Gorge, WA.
    Owner/Designer &Toaster Tech Passinwind Electronics
    Bob Gallien has mentioned that he feels it works better without, FWIW.
     
  8. BLDavis

    BLDavis May the Tort be with you.

    May 21, 2009
    Ellenboro, NC
    I had a NEO 210 a few years ago that was un-lined. I contacted GK and was told it was designed that way. I lined it anyway and was pleasantly surprised. It had more clarity and better mid presence. I don't in any way to claim to know more than Mr. Gallien, but I trust my ears.
    B.
     
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  9. Passinwind

    Passinwind I know nothing. Commercial User

    Dec 3, 2003
    Columbia River Gorge, WA.
    Owner/Designer &Toaster Tech Passinwind Electronics
    I don't necessarily trust anyone's ears, including my own. [​IMG]
     
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  10. Passinwind

    Passinwind I know nothing. Commercial User

    Dec 3, 2003
    Columbia River Gorge, WA.
    Owner/Designer &Toaster Tech Passinwind Electronics
    All good, just wanted to get that out there though.
     
  11. 4Mal

    4Mal Gold Supporting Member

    Jun 2, 2002
    Columbia River Gorge
    I lined an mb-112 that I had briefly. I felt it dropped the tuning - or maybe suppressed the low mids. Either way I felt I had a more solid low end, or something less boomy. Now, that could also lead to maybe overpowering the driver and Bob’s concern may have been based as much in reliability as tone. IIRC later generations of the amp are delivered lined. I reserve the right to be wrong there however. I haven’t been following closely for a long time.

    Anyhow, I’ll give it a test and either add more, pull it out or leave it as is...
     
    Passinwind likes this.
  12. Passinwind

    Passinwind I know nothing. Commercial User

    Dec 3, 2003
    Columbia River Gorge, WA.
    Owner/Designer &Toaster Tech Passinwind Electronics
    Cool. Not sure if I can make it to your gig tonight, but it's on my radar at least.
     
  13. 4Mal

    4Mal Gold Supporting Member

    Jun 2, 2002
    Columbia River Gorge
    Well it’s also the first outdoor open mic of the White Buffalo season. If it’s dry then that might be fun. At least an opportunity to catch up with the Baja returnees ;-)
     
  14. Passinwind

    Passinwind I know nothing. Commercial User

    Dec 3, 2003
    Columbia River Gorge, WA.
    Owner/Designer &Toaster Tech Passinwind Electronics
    Thanks for the heads-up. If I don't play the open mike I could do both for a while. Or I could just take a nap...snerk, zzzzzzzzzz.
     
  15. While taking the driver out of my MB115 to measure the TS parameters (out of curiosity) I found that the cab had no acoustic damping material. Appalled, I lined the entire interior with dacron and eagerly anticipated hearing the improvement. I was indeed amazed... at how the change had sapped the tone of energy and aggressiveness, taking much of the 'life' out of the sound. I reduced interior coverage by half - still lifeless. Reduced to 1/3 coverage, including behind the driver and had a satisfying compromise. IMO, this is strictly a personal preference issue. Bob Gallien's design choice is perfectly valid. Fortunately, if you disagree, it's easily adjusted.
     
    nolezmaj, 4Mal and Passinwind like this.
  16. Passinwind

    Passinwind I know nothing. Commercial User

    Dec 3, 2003
    Columbia River Gorge, WA.
    Owner/Designer &Toaster Tech Passinwind Electronics
    Thanks. I thought I remembered all of that, save that you were the one who posted it.
     
  17. 4Mal

    4Mal Gold Supporting Member

    Jun 2, 2002
    Columbia River Gorge
    Well the light stuffing job I did seems to have reduced the boom. So far so good.
     
  18. Passinwind

    Passinwind I know nothing. Commercial User

    Dec 3, 2003
    Columbia River Gorge, WA.
    Owner/Designer &Toaster Tech Passinwind Electronics
    Seemed like an improvement from your last gig there to me, even though the room stuffing wasn't really working in your favor last night. [​IMG]