Ohm ?

hamzahsh
hamzahsh Posts: 439
edited July 2004 in Basic Hookup/Wiring Questions
Which is better? I mean in terms of power quality and performance.

8 ohm, 4 ohm or 2 ohm
:)
Panasonic TH-50PX80U Plasma HDTV
Polk Audio RT800i (fronts)
Polk Audio CS400i (center)
Polk Audio F/X1000 (side surrounds)
Polk Audio RTi6 (back surrrounds)
Velodyne CHT-15 (subwoofer)
Yamaha RX-V1400 (Pre/Pro)
NAD C272 (2-ch Amp)
Adcom GFA-7605 (5-ch Amp)
Toshiba SD-3109 (DVD/CD player)
Malata DVP-580 (Multi-region DVD player)
Post edited by hamzahsh on
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Comments

  • bknauss
    bknauss Posts: 1,441
    edited July 2004
    V=IR, P=IV, P=I^2*R, P=V^2/R. From these equations, we know a smaller resistance means more power to the speaker. In technical terms, there's less noise when hooking up a larger resistance, but the difference is so small no human would ever notice the difference.
    Brian Knauss
    ex-Electrical Engineer for Polk
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  • LittleCar_w/12s
    LittleCar_w/12s Posts: 568
    edited July 2004
    Well it is easier to build an amp that has better quality, less distortion due to heat, and more properly designed cuircuts when dealing with higher resistance, but a higher voltage in direct opposition must be used to obtain the same wattage output. Therefore it is more stable to build a setup for 16ohm, but it's only appropriate in home use, bet even barely there. We're talking high Volts. Almost impossible in cars, without loads of cash.

    Therefore a 8ohm is better and will have better cuircutry driving it inherently - and is seen in most home systems, but a 2ohm is easier for car use where 12v has to be stepped up to 40-70 V for the high outputs.
    ___________________________
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