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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. Valve Amplification Company - Wikipedia

   en.wikipedia.org/wiki/Valve_Amplification_Company

   On June 10, 2014, Kevin Hayes was issued U.S. Patent 8,749,310 for "amplifier bias control". This patent covers the only known technique for observing the true underlying quiescent current (idle current) of an output tube (or transistor) under dynamic signal conditions, and then holding it to the stable target value with a precision of 99% or ...

4. Harman Kardon - Wikipedia

   en.wikipedia.org/wiki/Harman_Kardon

   One year after its founding, in 1954 Harman Kardon introduced their first products, the 7 tube A-100 AM - FM tuner featuring automatic frequency control, priced at $70.50 (equivalent to $800 in 2023) [7] [8] and the Festival D-1000 receiver, the world's first integrated hi-fi receiver priced at $189.50 (equivalent to $2,150 in 2023).

5. Bi-amping and tri-amping - Wikipedia

   en.wikipedia.org/wiki/Bi-amping_and_tri-amping

   A single amplifier can usually power a woofer and a tweeter only through a post-amplifier crossover filter, which protects each driver from signals outside its frequency range. Bi-amping of speakers requires double the channels of amplification and can be accomplished using two ordinary amplifiers in either a vertical or horizontal arrangement.

6. Lexicon (company) - Wikipedia

   en.wikipedia.org/wiki/Lexicon_(company)

   First in the series was the PCM-60 (1984), followed a few years later by the Lexicon PCM-70, the latter adding multi-effects from the 224X and a digital screen interface. The MRC, an early MIDI control surface, was released in the late 1980s to provide remote control of the PCM-70, LXP series processors, and other MIDI devices.

7. Backpacks full of $1.1 million worth of cocaine found near ...

   www.aol.com/news/backpacks-full-1-1-million...

   Agents on patrol discovered two backpacks stuffed with more than $1.1 million worth of cocaine in Washington state near the border with Canada, U.S. Customs and Border Protection said Monday.