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  2. Constant-voltage speaker system - Wikipedia

    en.wikipedia.org/wiki/Constant-voltage_speaker...

    600 watt transformers are widely available for contractors needing high power loudspeakers in constant-voltage installations. [12] Special-purpose transformers capable of handling 1250 watts down as low as 50 Hz are available. [4] One problem with high power, high current transformers is that fewer can be used on a single constant-voltage line.

  3. Talk:Constant-voltage speaker system - Wikipedia

    en.wikipedia.org/wiki/Talk:Constant-voltage...

    To 129.55.27.4, who changed the transformer information: Transformers do not act as lowpass filters. They block DC voltages. 70V transformers result in a lack of low frequency information. High frequency information is not affected. Revision undone. 74.92.147.125 19:17, 26 March 2008 (UTC) Actually, you're both right.

  4. Full-range speaker - Wikipedia

    en.wikipedia.org/wiki/Full-range_speaker

    Several manufacturers build small (typically 115 mm (4.5")) diameter full-range drivers into miniature enclosures, and many of these include 25 or 70-volt line transformers, for use on commercial sound systems employing long speaker cables.

  5. Transformer - Wikipedia

    en.wikipedia.org/wiki/Transformer

    In electrical engineering, a transformer is a passive component that transfers electrical energy from one electrical circuit to another circuit, or multiple circuits.A varying current in any coil of the transformer produces a varying magnetic flux in the transformer's core, which induces a varying electromotive force (EMF) across any other coils wound around the same core.

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  7. Transformer types - Wikipedia

    en.wikipedia.org/wiki/Transformer_types

    Transformer oil is flammable, so oil-filled transformers inside a building are installed in vaults to prevent spread of fire and smoke from a burning transformer. Some transformers were built to use fire-resistant PCBs , but because these compounds persist in the environment and have adverse effects on organisms, their use has been discontinued ...

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