Matching speakers : power or sensitivity??

Discussion in 'Cabinets & Speakers' started by cylon185, Dec 28, 2010.

  1. cylon185

    cylon185 New Member

    Joined:
    Sep 23, 2009
    Messages:
    603
    Likes Received:
    29
    Location:
    Melbourne
    Hi Guys,

    Sorry for all the newbie questions, and thanks for sharing your knowledge.

    I'm planning to have two cabinets with a total of four different speaker types.

    At the moment, i've got t75s and v30s in the 1982A, and waiting for two greenbacks and two g12h30 for my 1935B.

    Here's my dilemna : is it better to mix as per plan, or match sensitivities?

    I mean, i could do this :
    1982A with v30s and h30s (both 100db, but 60W and 30W)
    1935B with GBs and t75s (98db 25W, 97db 75W)

    Also, what's you guys opinion on which cab to use for which speakers?
     
  2. Ken

    Ken Well-Known Member

    Joined:
    Feb 24, 2009
    Messages:
    9,935
    Likes Received:
    3,116
    Location:
    Arlington Heights, IL
    Mixing wattage ratings is fine as long as the cabinet can handle the amp you plan on using. The 25w and 75W would give "only" 50w of capacity and that might be cutting it too close for a 50W amp. You'll only get 45w on the 4x12 and that's a really bad idea IMHO.

    Using 25 and 30 watt speakers in a 2x12 means you need a really low power amp; 2x30watts with a 50 watt amp is okay but that's as low as I'd go. As for the 4x12, if it can't handle 100 watts you'll never sell it (in case you decide to). I would at least use 4x25 and stick to 50 or so watt amps.

    As for sensitivity, it's fine to mix but be aware the 3 dB difference will make the blend different than if all were the same.

    As an aside, 1982 cabs had H series speakers more often than not; it would be nice to put four G12H 30's in.

    Ken
     
  3. cylon185

    cylon185 New Member

    Joined:
    Sep 23, 2009
    Messages:
    603
    Likes Received:
    29
    Location:
    Melbourne
    Hi Ken, and thanks for your reply.

    A 1935B is a 4x12, so even with 4 greenbacks i'd have 100W, enough for my 30th anniv head as i never crank it fully !
     
  4. Rockerduck

    Rockerduck Active Member

    Joined:
    Sep 6, 2010
    Messages:
    262
    Likes Received:
    26
    One thing I learned over the years with the mismatched wattage speakers in a closed back cabinet; one speaker moving more air and one less shortens speaker life. The cadence of the speaker movement counters each other. In an open cab not a problem.
     

Share This Page