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ohm speaker quality.

Discussion in 'General Electronics Chat' started by cjdelphi, Jun 13, 2009.

  1. cjdelphi

    Thread Starter New Member

    Mar 26, 2009
    Obviously the resistance in ohms from the speaker represents the power requirement needed, for example 4 ohms will consume more power than an 8 ohm speaker.

    9v/4=2.225 amps where as the 8ohm will draw 1.125 amps, but does that mean better quality? or does that mean the 4 ohm will simply handle the deeper tones (bass is better for example)

    What's the advantages of more amps in a speaker? is there anything?
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    At one time, 8 ohms was pretty much the universal speaker impedance. The modern trend is to use lower voltages, so 4 ohms is much more standard. You can push current through 4 ohms with a lower voltage than with 8 ohms.

    For headphones, though, the impedance has gone up. Instead of 8 ohms, 32 ohms or greater is most common.

    The quality of the speaker is dependent more on the quality of manufacture than on the voice coil impedance.
  3. cjdelphi

    Thread Starter New Member

    Mar 26, 2009
    Fair Enough.. makes sense (materials used, the cone material i suppose). I just can't help feel the more current more air waves to push around....
  4. Audioguru


    Dec 20, 2007
    2 ohm and 4 ohm speakers are used in cars because the 13.8V supply will allow a bridged amplifier to produce 10W into an 8 ohm speaker, 16W into a 4 ohm speaker or 25W into a 2 ohm speaker at clipping.

    At home the power supply for the amplifier can produce a high enough voltage for 8 ohm speakers to produce high output power.

    If the amplifier has enough extra power then simply turn up the volume control for the speaker to push more air around.
  5. PRS

    Well-Known Member

    Aug 24, 2008
    Until Bose came out with their speakers a good speaker had a fatter magnet than a speaker of less quality. The magnet makes it more sensitive to changes in current giving them a higher fidelity.