1. Please take 30 seconds to register your free account to remove most ads, post topics, make friends, earn reward points at our store, and more!  

Cabinet ID request (Ampeg content)

Discussion in 'Amps and Cabs [BG]' started by BioWeapon, May 10, 2020.


  1. Hey folks,

    I've had this cabinet for sale in my local classifieds for a little while now and recently somebody asked what drivers are in it. To my surprise, when I pulled a speaker I found out it was a 1974 CTS square back driver!
    IMG_20200510_141419.jpg

    And here's some shots of the cab in question:
    IMG_20200510_151049.jpg IMG_20200510_151054.jpg IMG_20200510_151132_1.jpg IMG_20200510_151021.jpg IMG_20200510_151036.jpg IMG_20200510_145927.jpg IMG_20200510_141445.jpg

    Now I have no idea what to make of this, so I'm deferring to the experts on TB. I've seen some posts on TB related to the drivers themselves and what cabs they may have been in, but no reference or images of something like this.

    On one hand it could be a DIY rehouse with the parts from an old wrecked cabinet, which is what I'm thinking based on the quality of the workmanship. On the other hand, it could be a cut down 810 or something like that. It's 3/4" ply all over and quite sturdy, or so my back tells me every time I try to lift it. :D Another detail of note is the drivers are held in by what look to be period correct (for the drivers) 1/4" hex-head screws.

    Anybody have any ideas? For what it's worth, it sounds real good despite not being particularly attractive! I may keep it a while longer given how hard it is to sell music gear right now.
     
    JimmyM likes this.
  2. Jim Carr

    Jim Carr Dr. Jim Gold Supporting Member

    Jan 21, 2006
    Denton, TX or Kailua, HI
    fEARful Kool-Aid dispensing liberal academic card-carrying union member Musicians Local 72-147
    Looks homemade. Howzit sound? :thumbsup:

    oops, you answered that. Not sure about the badge, but those drivers look beefy for their era.
     
    BioWeapon likes this.
  3. Mighty good in my opinion! Really balanced, pleasant midrange, but maybe a wee bit light on the lows. Mind you that's an inside-the-house-volume assessment :)
     
  4. coreyfyfe

    coreyfyfe Supporting Member

    Nov 19, 2007
    boston, ma
    Looks like someone built road case edges onto a B40 cab. Could be home built, but I’ve had a few B40s and one did have 74/75 dated CTS drivers with these part numbers.

    MF3NefX.jpg

    The speakers appear about the same but did have different part numbers (1/2 anyways) than the speakers in my 72 flatback 8x10 (below).

    roXZ0Y8.jpg
     
    Jim Carr and BioWeapon like this.
  5. I did find the B40 when digging around on my initial search, in fact I'd seen some of your driver pics in other threads. Thanks for chiming in!

    Though, I don't think this is a B40 cab based on the fact that it's smaller than a B40. I only noticed that by looking at how the drivers are spaced. Of course, I can't eliminate the possibility that the speakers came out of a B40, so there's that. :)
     
    Jim Carr likes this.
  6. For reference, box dimensions are:
    24.75" tall, 26.25" wide, 16" deep.
     
  7. Bump - anybody else?
     
  8. PraiseBassing

    PraiseBassing Supporting Member

    Mar 6, 2017
    California
    Also vote home made. Wood screws on the bottom of the badge that attach to nothing. Caster cutouts in line with the baffle instead of either side of it. This doesn't seem to be thought out enough to be a production cabinet. There might be a cool story behind it tho.
     
  9. The casters actually look like a post-build addition. I would assume the plywood slats their mounted on would be painted and there wouldn't be redundant metal feet if they were there in the first place.

    I would personally love to track down whoever built it or some previous owners, but I'm not sure that's possible at this point! Maybe if I dig through my old facebook marketplace messages I can find the couple I bought it from...
     
  10. PraiseBassing

    PraiseBassing Supporting Member

    Mar 6, 2017
    California
    Would be interesting to hear how it came about.
     
  11. JimmyM

    JimmyM

    Apr 11, 2005
    Apopka, FL
    Endorsing: Ampeg Amps, EMG Pickups
    Folks did cut down 810's back in the day to make 410's.
     
    BioWeapon likes this.
  12. Was it pretty common...? I can see it being a relatively difficult thing to do well. Wish I had a list of 810 dimensions to compare with!
     
  13. JimmyM

    JimmyM

    Apr 11, 2005
    Apopka, FL
    Endorsing: Ampeg Amps, EMG Pickups
    Wouldn't say common, but it did happen. By far not the first cutdown I would have seen. I'll try to get to mine and measure it tonight if nobody else comes through.
     
    BioWeapon likes this.
  14. Thanks Jimmy :D
     
    JimmyM likes this.
  15. JimmyM

    JimmyM

    Apr 11, 2005
    Apopka, FL
    Endorsing: Ampeg Amps, EMG Pickups
    Due to where it's packed, all I can give you is width and depth. 26 1/4" W x 16" D.

    Therefore I'm sure it's a cutdown, and all the trim was added to disguise it.
     
    BioWeapon likes this.
  16. Hah! Same dimensions! Would you look at that! Is your 810 a vintage unit as well?
     
    JimmyM likes this.
  17. JimmyM

    JimmyM

    Apr 11, 2005
    Apopka, FL
    Endorsing: Ampeg Amps, EMG Pickups
    1973 flatback.
     
    BioWeapon likes this.
  18. coreyfyfe

    coreyfyfe Supporting Member

    Nov 19, 2007
    boston, ma
    A cut down flatback wouldn’t surprise me either. Have seen it before.

    My 72 flatback with the grill off -

    qBCD2Ah.jpg

    The B40 with the grill off -

    RFxvj6f.jpg

    As you mentioned the B40 speakers sit slightly wider apart than the flatback. Both were about 16” deep but I believe the B40 was 27” wide. My V4 overhung the flatback by about 1/2” on either side but fit the B40 perfectly.

    The dimensions of the 8x10 are listed here

    OwyJPWr.jpg
     
    BioWeapon likes this.
  19. Thanks folks. That's exactly the kind of info I was hoping for! :)
     
  20. Primary

    Primary TB Assistant

    Here are some related products that TB members are talking about. Clicking on a product will take you to TB’s partner, Primary, where you can find links to TB discussions about these products.

     
    Feb 28, 2021

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.