Ohms & volume

Discussion in 'Amps and Cabs [BG]' started by OldJackBloom, May 19, 2001.

  1. OldJackBloom


    May 12, 2001
    Reno, NV
    Is your sound louder if you push more wattage through less ohms with the same amp?

    For instance, is it louder if your amp pushes 500 watts through a 4 ohm 4x10 than if it push 350 watts through an 8 ohm 4x10?

    Or is it that it just takes more power through more resistance to achieve the same volume?
  2. In most cases it will be louder, unless it's 2 totally different cabs where some other parameter besides impedance makes a difference in the volume output.

    In the example you give, the 4 ohm setup will probably be louder since your amp is able to give more power.

  3. MJB


    Mar 17, 2000
    ALL other things being equal more watts=more volume. The lower impedance is the reason the amp is rated at higher power for the 4 ohm load, assuming there is no selector switch, or different output jacks for different load impedances, that cause an actual change in the circuit path. Bear in mind, however, that you need about a 3db increase in volume to really be noticeably louder, and that takes twice the power.
  4. OldJackBloom


    May 12, 2001
    Reno, NV
    I thought that less ohms = more resistance. Not true?
  5. Oysterman


    Mar 30, 2000
    No, not true. Ohms is a measurement for impedance = resistance.
  6. Please note that going from 350 to 500 watts only gives you an increase of 1.6 dB. I doubt you'll hear much difference.