mystery 15" cab , can anyone identify?

Discussion in 'Amps and Cabs [BG]' started by 1Drop, Dec 1, 2015.

  1. 1Drop


    Jul 31, 2009
    A friend of mine is selling this dirt cheap. He says its 350 watts. I assume its 8 ohm. (the plaque fell off) I run a gbe 1200 with a 4 ohm 2x12. If i add this cab I'd need to run in 2 ohm mode correct?

    Attached Files:

  2. B-string

    B-string Supporting Member

    Pretty generic looking. It would be real good to know what actual speaker is in there. Maybe you can see it by taking off the input plate in the back (if it has one) or a side handle.
  3. I wouldn't be running it at all until I found its impedance. A multi-meter will give you an approximation.
    But. .... depending on yr 212...It may not even ADD positively to your sound. Might create phase issues. .Not match up well with the 212.
    Do as B says above 1st
    old spice likes this.
  4. agedhorse

    agedhorse Supporting Member Commercial User

    Feb 12, 2006
    Davis, CA (USA)
    Development Engineer-Mesa Boogie, Development Engineer-Genzler (pedals), Product Support-Genz Benz
    Piezo hints that it may not be what you hope for...

    Yes, you will need to use the GBE-1200 in 2 ohm mode.
  5. DavidEdenAria


    Dec 13, 2013
    On a Hill
    I ALWAYS pull the speaker on a new cabinet immediately to check everything...impedance, connections, making sure the screws holding the speaker are holding correctly etc.

    The value depends much on what speaker is in that cabinet.....and then the overall quality of the cabinet & hardware.
  6. 1Drop


    Jul 31, 2009
    Thanks fellas! Not sure what to do. I've been wanting to try a 15 out with my rig ever since i played a bar that had a 15 carvin cab as backline. I stacked my 2x12 on top and figured if i didn't like what was happening i could just quickly disconnect the 15. I ended up really appreciating that extra push at ground level. I usually always elevate my caps to get em closer to my ears so i don't need as much volume. That particular night having the 15 on the floor with the 2x12 on top really seemed to work. I could pick this thing up for like 40 or 50 bucks. Of course thats 40 or 50 bucks wasted if its not suitable for a bass cab. I'm thinking now maybe i'll just pick up a carvin since I'll sort of know what to expect. definitely open to suggestions though. playing mainly roots reggae with a thumb 5er. I never should of sold my old GB 4x10, that thing had low end for days!! the neo 2x12's, even when doubled up, just doesn't seem to have that same low end roundness i need.
  7. 1Drop


    Jul 31, 2009
    Just did a little research. I'm seeing that my GB 2x12 goes down to 42hz. The 3 way carvin 15 goes down to 26hz and the basic cheapie carvin goes down to 35hz. These seem like pretty drastic differences that may be critical for getting the reggae low end i'm still searching for. thoughts?
  8. AltGrendel

    AltGrendel Squire Jag SS fan.

    May 21, 2009
    Mid-Atlantic USA.
    If you're really sold on that cab, the "take the speaker out and look" approach would be best. See if the specs will work.
  9. BasturdBlaster


    Feb 19, 2012
    Crandon WI
    I'd also be sure to check the used section at guitar center before buying that cab........
  10. B-string

    B-string Supporting Member

    Be very cautious when reading the frequency response claims. if it doesn't mention a "db" point like 35Hz @-10db it is meaningless. -10db point is barely audible, -3db is a half volume drop. Anyone can claim 26Hz, the speaker cone will move but you won't hear the 26Hz signal just feel air on your legs.
  11. Rick James

    Rick James Inactive

    Feb 24, 2007
    New Jersey
    The Fridge -3dB point is 58Hz, and that's never proved to be an issue with reggae.
  12. Passinwind

    Passinwind I know nothing. Commercial User

    Dec 3, 2003
    Columbia River Gorge, WA.
    Owner/Designer &Toaster Tech Passinwind Electronics
    Yep, and it needs to explicitly specify in what environment it was measured as well.
    B-string likes this.
  13. murphy

    murphy Supporting Member

    May 5, 2004
    radio shack speaker cab
  14. agedhorse

    agedhorse Supporting Member Commercial User

    Feb 12, 2006
    Davis, CA (USA)
    Development Engineer-Mesa Boogie, Development Engineer-Genzler (pedals), Product Support-Genz Benz
    There's no way the Carvin 15" that you mentioned goes down to 26Hz in any meaningful way, and certainly not the way most cabinets are measured. Are you sure you didn't misread the specifications as 26 Hz rather than 46 Hz? The spec's I found below appear to be totally reasonable.

    Here it shows:
    Model: LS-1503
    System Type: 15-inch 3-Way, bass-reflex
    Frequency Response: 46 Hz - 20 kHz (-10DB); 52 Hz - 18 kHz (-3 dB)

    I also caution that you also learn more about power handling... this model is marketed as 800 watts, but upon reading the details of the spec's, it's rated at 400 watts continuous and 800 watts program. Your Genz Benz is rated only using the more conservative (and realistic with regards to bass reproduction) continuous (or "RMS") number, the equivalent program rating would otherwise be somewhere around 1200 watts (which would also be misleading for bass guitar reproduction), though we never used "program power ratings" for this reason.

    I encourage that you ask questions and learn as much as you can about this stuff, you will then be able to make better, more informed opinions.

    Hope this helps.
    B-string likes this.
  15. Gravedigger Dav

    Gravedigger Dav Gold Supporting Member

    Mar 13, 2014
    Springtown, Texas
    Yes, 2 ohms would be the setting. With 1 4 ohm cab and 1 8 ohm cab in parallel, the amp will see 2.667 ohms.
    That isn't the issue. Although I have run mixed cabs successfully several times, you have to see how they work together.
    The 4 ohm cab will be drawing (roughly) 2/3 of the power. That will make the 2x12 overpower the 1x15.
    Also, if you do this, you will need to be sure the cabs are in phase; otherwise, they will try to cancel each other out.
    And lastly, the 2x12 has more surface area than the 1x5 and will want to move more air.
    So, I'm thinking it wont really help much and may degrade your sound.
  16. agedhorse

    agedhorse Supporting Member Commercial User

    Feb 12, 2006
    Davis, CA (USA)
    Development Engineer-Mesa Boogie, Development Engineer-Genzler (pedals), Product Support-Genz Benz
    Depending on which 115 and which 212, it may be a fine combination power-wise as well as sensitivity wise.
  17. DavidEdenAria


    Dec 13, 2013
    On a Hill
    I wouldn't bet that these cabs will mix well.

    However at $40 I cant see a real loss either, provided the speaker itself is okay.

    For the most part I don't like mixing drivers of different sizes for bass unless they were designed to do so....ymmv.
  18. Jazz Ad

    Jazz Ad Mi la ré sol

    It looks more like a PA than a bass cab to me.
  19. fretter


    May 24, 2012
    Brand wise, it could be an Electro Voice. Some of theirs looked similar, although they've all been discontinued. They apparently just make PAs now.
  20. DavidEdenAria


    Dec 13, 2013
    On a Hill
    If that's any kind of EV 15 inside, BUY IT!

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