LDS Cab in 4 or 8 ohms

Discussion in 'Amps and Cabs [BG]' started by Morris Mulberry, Feb 2, 2018.


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  1. Hey everyone! This is my first post on TalkBass and I was hoping all you guys and gals could give me some advice. I’m going to order a cab from LDS. It’s going to be a vertically aligned 212 with a 6.5 mid driver rated at 900w. I’m thinking of pairing it with either a GK MB500 (350w/500w) or a 700RB-ll (320w/480w). What I’m trying to decide is if I should get the cab in 8 or 4 ohms. If I understand correctly an amp can put out transient peaks up to twice its output...? Should that happen at 4 ohms with either amp I’d be over the cabs rated power. At 8 ohms I’d be alright. I don’t plan on getting another cab so future expansion isn’t a consideration. I just want to get the most “safe” power out of my head without damaging the cab. Thanks for your help!
     
  2. Stumbo

    Stumbo Guest

    Feb 11, 2008
    Volume control?
     
    BadExample likes this.
  3. I am guessing LDS rumours of retirement are untrue?
     
  4. If the woofers are the Eminence 3012LF you should be hunky dory at 4 ohm, some would even say the amps are too small.
     
    BadExample and Jeff Scott like this.
  5. Chef

    Chef In Memoriam

    May 23, 2004
    Columbia MO
    Staff Reviewer; Bass Gear Magazine
    Don is still around.

    Get the 4 ohm version unless you see yourself running two cabs at some point.
    Then you want two 8 ohm cabs for a total 4 ohm load
     
  6. Jeff Scott

    Jeff Scott Rickenbacker guru..........

    Apr 11, 2006
    Out there!
    Given my experience with owning basically what you are looking to have Don make you you will not ever want for a second cabinet. Go 4Ω.
     
    BadExample and yodedude2 like this.
  7. jnewmark

    jnewmark Just wanna play the groove. Supporting Member

    Aug 31, 2006
    Stax 1966
    Third St. Cigar Records staff musician.
    What Chef said. I had an almost identical cab built for me by Don in 4 ohms. I never felt the need to be any louder with a 600 watt amp head. 212 002.jpg Unless you are going to play insanely loud, get the 4 ohm cab.
     
    BadExample and DukeLeJeune like this.
  8. Kro

    Kro Supporting Member

    May 7, 2003
    New Jersey
    Can you confirm the drivers? If they are 3012lfs as @Downunderwonder noted 450w is the RMS rating for one of them, so double: 900, like you noted.

    See the program rating below that takes into account those fleeting transients.

    This is, again, for one 3012lf:
    Screenshot_20180203-105220~2.png

    Two will have a program rating of upwards of 1800w! :wideyed::wideyed::wideyed:
     
  9. The woofers are 3012HO’s. I’ve spoken to Don a few times since the holidays and he recommended the HO’s based on their efficiency and the cab design. I shall defer to his knowledge and expertise because I’m thee most unscientific guy you’ll find!
     
  10. Kro

    Kro Supporting Member

    May 7, 2003
    New Jersey
    Oh, so a mere 1600w program.

    Screenshot_20180203-110239~2.png

    You'll be fine. :thumbsup:
     
    yodedude2 likes this.
  11. Kro

    Kro Supporting Member

    May 7, 2003
    New Jersey
    On a separate note, that seems to mean that he's adding another 100w RMS total cab power handling on due to... the mid driver? Not to doubt Don, but is it accurate that the mid would see/take so many watts when running at the extreme (400 per 12, 100w to the mid)? Or am I missing something?
     
  12. That’s was my main concern, those fleeting transients. I looked up the HO’s and they're 400 rms/800 peak so 1600 available for those peaks.
     
  13. That’s how I understand it.
     
  14. Unless those transients come in the lower frequencies? Maybe since it’s crossed over that protects the mid driver....
     
  15. Kro

    Kro Supporting Member

    May 7, 2003
    New Jersey
    I'd assume 900 to be the total RMS rating.
     
  16. Quadzilla

    Quadzilla Supporting Member

    Love my LDS 2x10 / 2x6.5 (4 ohm) - Faital drivers. IMG_20171226_194937.jpg
     
    JeffC23, smogg, jnewmark and 3 others like this.
  17. Quadzilla

    Quadzilla Supporting Member

    The 2 6.5" drivers are on a slant so they are easier to hear. Awesome cab!
     
  18. Nice cabs guys!
     
    Quadzilla likes this.
  19. BassmanPaul

    BassmanPaul Inactive

    I too would go 4Ω but then again all of my amplifiers work happily into 2Ω. If you have amps limited to a 4Ω minimum then I would select an 8Ω cabinet. The difference in volume will be hardly noticeable and you never know what your future needs might be. Best not to limit them.
     
    soflbass and BadExample like this.
  20. SactoBass

    SactoBass A retired civil engineer who likes all-tube amps!

    Jul 8, 2009
    Lake Havasu City, AZ
    ^^^THIS! :thumbsup:
     
  21. 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.

     
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