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Aram Il’yich Khachaturian (/ˈærəm ˌkɑːtʃəˈtʊəriən/;[1] Russian: Ара́м Ильи́ч Хачатуря́н; Armenian: Արամ Խաչատրյան, Aram Xačatryan;[A] Armenian pronunciation: [ɑˈɾɑm χɑt͡ʃʰɑt(ə)ɾˈjɑn]; 6 June [O.S. 24 May] 1903 – 1 May 1978) was a Soviet Armenian composer and conductor. He is considered one of the leading Soviet composers.[5][6] Born and raised in Tbilisi, the multicultural capital of Georgia, Khachaturian moved to Moscow in 1921 following the Sovietization of the Caucasus. Without prior music training, he enrolled in the Gnessin Musical Institute, subsequently studying at the Moscow Conservatory in the class of Nikolai Myaskovsky, among others. His first major work, the Piano Concerto (1936), popularized his name within and outside the Soviet Union. It was followed by the Violin Concerto (1940) and the Cello Concerto (1946). His other significant compositions include the Masquerade Suite (1941), the Anthem of the Armenian SSR (1944), three symphonies (1935, 1943, 1947), and around 25 film scores. Khachaturian is best known for his ballet music—Gayane (1942) and Spartacus (1954). His most popular piece, the “Sabre Dance” from Gayane, has been used extensively in popular culture and has been covered by a number of musicians worldwide.[7] His style is “characterized by colorful harmonies, captivating rhythms, virtuosity, improvisations, and sensuous melodies.”[8] During most of his career, Khachaturian was approved by the Soviet government and held several high posts in the Union of Soviet Composers from the late 1930s, although he joined the Communist Party only in 1943. Along with Sergei Prokofiev and Dmitri Shostakovich, he was officially denounced as a “formalist” and his music dubbed “anti-people” in 1948, but was restored later that year. After 1950 he taught at the Gnessin Institute and the Moscow Conservatory, and turned to conducting. He traveled to Europe, Latin America and the United States with concerts of his own works. In 1957 Khachaturian became the Secretary of the Union of Soviet Composers, a position he held until his death.
Khachaturian was the most renowned Armenian composer of the 20th century[9] and the author of the first Armenian ballet music, symphony, concerto, and film score.[B] While following the established musical traditions of Russia, he broadly used Armenian and to lesser extent, Caucasian, Eastern & Central European, and Middle Eastern peoples’ folk music in his works. He is highly regarded in Armenia, where he is considered a “national treasure”.[12]

Source: Aram Khachaturian – Wikipedia

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Source: Install Ace Stream and Working version of Plexus on your device Kodi 17.1 on Android Box – Best for Kodi

A bass reflex system (also known as a ported, vented box or reflex port) is a type ofloudspeaker enclosure that uses a port (hole) or vent cut into the cabinet and a section of tubing or pipe affixed to the port. This port enables the sound from the rear side of the diaphragm to increase the efficiency of the system at low frequencies as compared to a typical closed box (sealed-box) loudspeaker or an infinite baffle mounting.

A reflex port is the distinctive feature of this popular enclosure type. The design approach enhances the reproduction of the lowest frequencies generated by the woofer or subwoofer. The port generally consists of one or more tubes or pipes mounted in the front (baffle) or rear face of the enclosure. Depending on the exact relationship between driver parameters, the enclosure volume (and filling if any), and the tube cross-section and length, the efficiency can be substantially improved over the performance of a similarly sized sealed-box enclosure.

Though helpful with improving efficiency, bass reflex cabinets can have poor transientresponse compared to sealed enclosures at frequencies near the lower limit of performance, causing “smearing” or a longer resonance of the bass notes. Proper adjustment (“tuning”) of the cabinet and port size, and matching with driver characteristics can reduce much of this problem.

https://en.m.wikipedia.org/wiki/Helmholtz_resonance

A bass reflex system (also known as a ported, vented box or reflex port) is a type ofloudspeaker enclosure that uses a port (hole) or vent cut into the cabinet and a section of tubing or pipe affixed to the port. This port enables the sound from the rear side of the diaphragm to increase the efficiency of the system at low frequencies as compared to a typical closed box (sealed-box) loudspeaker or an infinite baffle mounting.

A reflex port is the distinctive feature of this popular enclosure type. The design approach enhances the reproduction of the lowest frequencies generated by the woofer or subwoofer. The port generally consists of one or more tubes or pipes mounted in the front (baffle) or rear face of the enclosure. Depending on the exact relationship between driver parameters, the enclosure volume (and filling if any), and the tube cross-section and length, the efficiency can be substantially improved over the performance of a similarly sized sealed-box enclosure.

Though helpful with improving efficiency, bass reflex cabinets can have poor transientresponse compared to sealed enclosures at frequencies near the lower limit of performance, causing “smearing” or a longer resonance of the bass notes. Proper adjustment (“tuning”) of the cabinet and port size, and matching with driver characteristics can reduce much of this problem.

https://en.m.wikipedia.org/wiki/Bass_reflex