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Audio Research Corporation ("ARC") is one of the oldest manufacturers of high-end audio equipment still in operation. The company was known to be a pioneer at advancing state-of-the-art audio reproduction in the 1970s, and for re-introducing the vacuum tube as the primary active amplification device.
McIntosh Laboratory is an American manufacturer of handcrafted high-end [1] [2] [3] audio equipment headquartered in Binghamton, New York. [4] [5] It is a subsidiary of McIntosh Group, which in November 2024 was acquired by Bose Corporation, a fellow American audio company..
The design featured 5 tubes with 10 watts output: EF86 as preamplifier, ECC83 phase-splitting, two EL84 in push-pull configuration, EZ80 rectifier. The amplifier used the excellent Partridge output transformer and was well known for its great sound reproduction.
Almost all audio preamplifier circuits are built using cascaded common cathode stages. The signal is usually coupled from stage to stage via a coupling capacitor or a transformer, although direct coupling is done in unusual cases. The cathode resistor may or may not be bypassed with a capacitor. Feedback may also be applied to the cathode resistor.
Tube sound (or valve sound) is the characteristic sound associated with a vacuum tube amplifier (valve amplifier in British English), a vacuum tube-based audio amplifier. [1] At first, the concept of tube sound did not exist, because practically all electronic amplification of audio signals was done with vacuum tubes and other comparable ...
An example of a typical high-end stereo preamplifier. A preamplifier, also known as a preamp, is an electronic amplifier that converts a weak electrical signal into an output signal strong enough to be noise-tolerant and strong enough for further processing, or for sending to a power amplifier and a loudspeaker. [1]
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