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2. Push–pull output - Wikipedia

   en.wikipedia.org/wiki/Push–pull_output

   A class-B push–pull amplifier is more efficient than a class-A power amplifier because each output device amplifies only half the output waveform and is cut off during the opposite half. It can be shown that the theoretical full power efficiency (AC power in load compared to DC power consumed) of a push–pull stage is approximately 78.5%.

3. Quad Electroacoustics - Wikipedia

   en.wikipedia.org/wiki/Quad_Electroacoustics

   Quad 33 pre-amplifier Quad II power amplifier. Following the mass production of 'stereo' vinyl records in 1958, the QC 22 control unit was developed and released in 1959. [3] This was a stereo control unit that was designed to be used with a pair of QUAD II mono power amplifiers.

4. 6SN7 - Wikipedia

   en.wikipedia.org/wiki/6SN7

   The 6SN7 was used as an audio amplifier in the 1940-1955 period, usually in the driver stages of power amps. The designer of the famous Williamson amplifier , one of the first true high-fidelity designs, suggested use of the 6SN7 (or B65) in his 1949 revision since it is similar to the original circuit's L63 (=6J5) British single triodes, four ...

5. TrueCrypt - Wikipedia

   en.wikipedia.org/wiki/TrueCrypt

   Months later on 7 June 2004, TrueCrypt 2.0 was released. [1] The new version contained a different digital signature from that of the original TrueCrypt Team, with the developers now being referred to as "the TrueCrypt Foundation." The software license was also changed to the open source GNU General Public License (GPL). However, given the wide ...

6. Constant-voltage speaker system - Wikipedia

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

   The voltage is constant only in the sense that at full power, the voltage in the system does not depend on the number of speakers driven (as long the amplifier's maximum power is not exceeded). [2] Constant-voltage speaker systems are also commonly referred to as 25- , 70- , 70.7- , 100 or 210-volt speaker systems ; distributed speaker systems ...

7. Do Kwon pleads not guilty to US fraud charges in $40 billion ...

   www.aol.com/news/former-crypto-executive-kwon...

   NEW YORK (Reuters) -Do Kwon, the South Korean cryptocurrency entrepreneur behind two digital currencies that lost an estimated $40 billion in 2022, pleaded not guilty on Thursday to U.S. criminal ...