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Fixing bigger speakers to small circuits

By aashishkotagiri
May 16, 2009
  1. hi guys

    im in big confusion!

    i fixed bigger speaker for my altec lansing i120...

    i mean i cut the wire which connects the second speaker and simpely added a bigger speaker to it!!

    the sound op is good!!(well increased atleast)

    the main question is "the original speaker is only 4ohms the newly connected one is 8ohms"

    i want to connect other one too that would be 16ohms insted of 8ohms!!

    so what will happen if i do so.... . .. . will my sound card spoil or will the speaker circuit damage??

    please please reply!!
     
  2. aashishkotagiri

    aashishkotagiri TS Rookie Topic Starter

    the bigger speakers belong to . . . . .

    an old radio

    well its written 80watts on the speakers!!

    i think the "altec" speakers would be someware around 40watts or so

    please some one reply
     
  3. aashishkotagiri

    aashishkotagiri TS Rookie Topic Starter

    ok free rapidshare accounts for for best reply(atleast i must satisfy).
     
  4. jobeard

    jobeard TS Ambassador Posts: 9,330   +622

    consider stereo vs mono; one each channel and you retain the speaker impedance.

    a) wire two speakers together and insert into one output --
    this is a parallel circuit and (if both speakers are the same impedance) you 1/2 the circuit impedance of one speaker.

    b) if you connect one wire from speaker A to one on B and then take
    the remaining wires and plug them into an output you create a
    serial circuit and the impedance is now 2x

    believe it or not, speakers are polarized and for (a) above, the + sides
    are connected together. for (b), a + from one is connected to the - of the other.

    Quality and power are best when the amplifier impedance matches the speaker(s) attached.
    Any mismatch will lessen the quality of the sound (even if you can't tell that) and reduce the effective power delivered to the speaker(s).
     
  5. aashishkotagiri

    aashishkotagiri TS Rookie Topic Starter

    you mean a circuit designed for 8ohms load would work fine with 16ohms load with small performance snag.

    well if the company is supplying speakers with the circuit. . . . . . it makes sure that load and source are matched for optimum output.

    which would make the circuit impedance 8ohms.

    what would happen if you connect 16ohms load to an 8ohms circuit??
     
  6. jobeard

    jobeard TS Ambassador Posts: 9,330   +622

    the amplifier would not be able to deliver the rated power to the speaker
     
  7. aashishkotagiri

    aashishkotagiri TS Rookie Topic Starter

    thats crystal clear!!
     
  8. aashishkotagiri

    aashishkotagiri TS Rookie Topic Starter

    lately i got bored up and connected the second one too . . . . .

    i cant makeout the quality diffrence . . . . .

    but im not using the speakers up to the fullest extent, im just afraid something would happen!!
     
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