70 volt line (aka - constant voltage)

Discussion in 'Amps and Cabs [BG]' started by Petebass, Oct 13, 2003.

  1. Petebass


    Dec 22, 2002
    QLD Australia
    Just curious. There seems to be growing interest in amps that can run at 2 ohms and run many speakers at once. Also devices such as the Speakermate which came about for the same reason.

    Just wondering if there is a reason why 70 volt applications have been restricted to background music and paging applications? Is there a reason why it doesn't work for PA stsyems, bass rigs etc?
    It seems that so far it has only been used in situations where audio quality isn't all that important so I'm guessing the answer lies there? Anyone?
  2. notanaggie

    notanaggie Guest

    Sep 30, 2003
    You got it.....the little cheap transformers usually used to match speakers to the 70V line really suck at low frequencies.

    Basically, a really good 70V system costs more than doing it straight. You are using a lot of transformers, and speakers, all of which need to be good.....and will be expensive

    The usual 70V system needs a certain sound pressure, over a large area, but not super fidelity nor low end. The 70V system shines at that. There are 30,000 watt 70V systems, but they are not generally waide range nor great audio.

    Not to say that Bill Gates couldn't afford a really good one..........he needs to spend more....
  3. Petebass


    Dec 22, 2002
    QLD Australia
    I thought so.

    thanks aggie.
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