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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. List of vacuum tubes - Wikipedia

   en.wikipedia.org/wiki/List_of_vacuum_tubes

   4CX250B – 250 W Ceramic tetrode, forced-air cooled, version 'B', favored by radio amateurs as a final amplifier. 4CX250BC – 250 W Ceramic tetrode, forced-air cooled, version 'BC' 4CX35000 – Ceramic tetrode used in numerous 50-kW broadcast transmitters, forced-air cooled, often in a Doherty configuration as in the Continental Electronics ...

4. Ceiling fan - Wikipedia

   en.wikipedia.org/wiki/Ceiling_fan

   The advent and evolution of new technologies have also played a major role in ceiling fan development. Following is a list of major ceiling fan styles and their defining characteristics: Cast-iron ceiling fans. These account for almost all ceiling fans made since their invention in 1882 through the mid-1960s.

5. 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.

6. Harman Kardon - Wikipedia

   en.wikipedia.org/wiki/Harman_Kardon

   Bogen was not interested so Harman resigned in 1953, [3] taking his boss, Bogen's chief designer Bernard Kardon (January 8, 1914 – April 14, 1993) with him. Naming their new company Harman/Kardon Inc., [ 4 ] each invested $5,000 (equivalent to $56,940 in 2023) in capital and opened a production facility in Westbury, New York.

7. High-volume low-speed fan - Wikipedia

   en.wikipedia.org/wiki/High-volume_low-speed_fan

   A High-volume low-speed fan. A high-volume low-speed (HVLS) fan is a type of mechanical fan greater than 7 feet (2.1 m) in diameter. [1] HVLS fans are generally ceiling fans although some are pole mounted. HVLS fans move slowly and distribute large amounts of air at low rotational speed– hence the name "high volume, low speed."

8. Bills QB Josh Allen to play briefly vs. Patriots to keep ...

   www.aol.com/sports/bills-qb-josh-allen-play...

   Allen has started 114 straight games for the Bills dating back to 2018.

9. Valve audio amplifier - Wikipedia

   en.wikipedia.org/wiki/Valve_audio_amplifier

   A valve audio amplifier or vacuum tube audio amplifier is a valve amplifier used for sound reinforcement, sound recording and reproduction. Until the invention of solid state devices such as the transistor , all electronic amplification was produced by valve (tube) amplifiers.