question about old Ampeg B25 cab w/ EV15R

Discussion in 'Amps [BG]' started by boroman, Jan 22, 2014.


  1. boroman

    boroman

    Joined:
    Apr 27, 2009
    Location:
    boro
    I recently acquied Ampeg B25 cab ('ve benn told it was bought in 1969) with 70's replacement speakers Electro Voice 15R series II (200w each).

    As I found out there was some factory replacements for the CTS speakers over the 70s Linden/Magnavox era and there were Altecs and EV's as a factory uprages (although EVs being more or less for the V4B cab). The codes on the speakers (both) are 79629 - I don't know how can I date them. Maye 79 is the year, but the 62 is not the week... I don't see any other codes on the speaker or the cone beside the LONG serial number.

    The strange thing about his cab that it looks completely stock, on the top it has four little dips for rubber feet.. but on the bottom it has six big dips in the size like my 8x10 has. So, is that original? All of them look stock. Maybe they did the little holes for B25 guitar amp, and the BIG holes for v4b and so on?
  2. coreyfyfe

    coreyfyfe Supporting Member

    Joined:
    Nov 19, 2007
    Location:
    boston, ma
    My B25 cab had six foot cups on top for the heads (SVT had 6 feet, most others had 4), 4 cups on bottom for the caster cart.

    Can't help you with the EV speakers, as far as I knew the factory upgrades were JBL or Altec in the early 70s, Altec in the mid-late 70s.
  3. boroman

    boroman

    Joined:
    Apr 27, 2009
    Location:
    boro
    Looks like this:

    Attached Files:

  4. JimmyM

    JimmyM Supporting Member

    Joined:
    Apr 11, 2005
    Location:
    Apopka, FL
    Disclosures:
    Endorsing: Ampeg Amps, EMG Pickups
    Would not complain about EV's. Corey's right that it had CTS's or Altec 421a's stock, but EV's were quite good as well, and if the cab sounds good to you, I wouldn't sweat it.
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  6. boroman

    boroman

    Joined:
    Apr 27, 2009
    Location:
    boro
    It's GREAT. Just wanted to know the date of speaker manufacture and the "cups" thing.
    I'm happy to play it with the SVT and knowing that it will not blow 5 minutes after playing because AFAIK the CTS were rated at 50W each and Altec's 100w/e
  7. coreyfyfe

    coreyfyfe Supporting Member

    Joined:
    Nov 19, 2007
    Location:
    boston, ma
    Yup that definitely 6 on the bottom. Interesting. I'm fairly certain mine was the other way, and I had the cart mounted with the screw holes like that, but I'm not 100% on that now looking at your pictures. I'll try to dig up some pictures of mine, sold it about a year ago so that would be the best I could do to confirm if I can.
  8. JimmyM

    JimmyM Supporting Member

    Joined:
    Apr 11, 2005
    Location:
    Apopka, FL
    Disclosures:
    Endorsing: Ampeg Amps, EMG Pickups
    Well you can still blow them with an SVT, but you should be able to get louder.
  9. vistacruiser

    vistacruiser

    Joined:
    Dec 22, 2006
    Location:
    Menomonee Falls, WI
    My 1969 has same cups as yours boroman, 4 on top for the B25 head, 6 on the bottom with the threads for the caster dolly. The dolly has only 4 feet though.

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