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7-Methylxanthine (7-MX), also known as heteroxanthine, is an active metabolite of caffeine (1,3,7-trimethylxanthine) and theobromine (3,7-dimethylxanthine). [1] [2] It is a non-selective antagonist of the adenosine receptors. [1] [2] The compound may slow the progression of myopia (nearsightedness). [1] [2] It is under investigation for this ...
A reel-to-reel tape recorder (Sony TC-630), typical of a 1970s audiophile device. Reel-to-reel audio tape recording, also called open-reel recording, is magnetic tape audio recording in which the recording tape is spooled between reels. To prepare for use, the supply reel (or feed reel) containing the tape is placed on a spindle or hub.
Rectilinear Research Corporation was a manufacturer of loudspeakers. The company was formed around 1966 and its principal was Morris I. Wiener (alt. sp. "Weiner") of Plandome Manor, New York. [1] The first known main office location for the company (1966–68) was at 30 Main Street, Brooklyn, New York. [2] Some time around 1968, the company ...
The Absolute Sound was founded in 1973 by Harry Pearson, who was its editor-in-chief and publisher. In the early years, TAS was a quarterly, digest-sized magazine and accepted no advertisements. [1] During the 1970s and 1980s, TAS (along with Stereophile) was influential in the audiophile industry. [2] Pearson is credited as being the most ...
The Absolute Sound. Harry Hall Pearson, Jr. (January 5, 1937 – November 4, 2014), known to his readers as HP, was an American journalist, audio reviewer, and publisher who founded The Absolute Sound magazine for high-end audio enthusiasts. Pearson is considered the most influential figure in the history of audiophile journalism. [1]
Threshold Audio. Threshold Audio is a high-end audio equipment manufacturer originally established in California in 1974 by audio engineer Nelson Pass and graphic designer René Besne. The company, today based in Houston Texas, manufactures mono-block and stereo power amplifiers, multi-channel power amplifiers and stereo control amplifiers.
The company was founded by William Z. Johnson in 1970 and was originally located in Minneapolis, Minnesota.ARC moved from Plymouth to Maple Grove, MN [3] in August 2018. . Johnson began designing custom audio electronics in the early 1950s and was the former owner of Electronic Industries, a specialty audio retail store in Minneapolis until the mid-1
Grusin and Rosen figured that the compact disc [34] [35] with its optical and audiophile capabilities would be a very important part of what they were trying to do to make the label successful, which was to produce high-quality recordings with the best sound and production available to them including recording venues, musicians and orchestras.
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