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  2. Constant-voltage speaker system - Wikipedia

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

    Constant-voltage speaker systems are also commonly referred to as 25-, 70-, 70.7-, 100 or 210-volt speaker systems; distributed speaker systems; or high-impedance speaker systems. In Canada and the US, they are most commonly referred to as 70-volt speakers. In Europe, the 100 V system is the most widespread, with amplifier and speaker products ...

  3. Talk:Constant-voltage speaker system - Wikipedia

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

    For example, in 1967, Crown International introduced the DC300 amplifier, which is capable of directly driving 70-volt lines, as well as traditional speaker loads, thanks to its overall power [1] of 500W. [2] In 1987, Crown introduced the Macrotech 2400, capable of driving 100-volt lines directly. [3]

  4. EL84 - Wikipedia

    en.wikipedia.org/wiki/EL84

    250 V a 200 V g2 200 V kf: Maximum Power Ratings 12 W a 1.75 W g2 (Philips) or 2 W g2 (RCA, Sylvania) 12 W a (Philips) or 14 W a (RCA) 1.75 W g2 (Philips) or 2.1 W g2 (RCA, Sylvania) Maximum Cathode Current, I k: 65 mA: 100 mA: Transconductance 11.3 mA/V: 11.0 mA/V: Internal (plate) resistance, R i: 38 kΩ: 26 kΩ: Test Conditions 250 V a 250 V ...

  5. LED circuit - Wikipedia

    en.wikipedia.org/wiki/LED_circuit

    In CC drivers, the voltage changes while the current stays the same. CC drivers are used when the electrical load of the LED circuit is either unknown or fluctuates, for example, a lighting circuit where a variable number of LED lamp fixtures may be installed. As an LED heats up, its voltage drop decreases (band gap decrease [1]). This can ...

  6. Full-range speaker - Wikipedia

    en.wikipedia.org/wiki/Full-range_speaker

    Manger claims performance, both maximum level and extended low frequency response, which is rather better than traditional full-range drivers. Another unusual full-range driver design is the Walsh driver, popularized in Ohm hi-fi speaker systems, where they reproduced almost the entire audible range of frequencies.

  7. Philips Launches Latest Innovations in Industry Leading ... - AOL

    www.aol.com/news/2012-10-25-philips-launches...

    Philips Launches Latest Innovations in Industry Leading Portfolio of LED Retrofit Lamps Philips DimTone BR30 LED, 100 Watt Equivalent and LED T8 replicate light quality of the light sources they ...

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