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By 1977, all of Crown's tape recorder products had been phased out. [2] In 1979, Crown introduced the PSA-2 & SA-2 power amplifiers with analog computer control of transistor performance to maximize output characteristics. [2] The FM-1 stereo radio tuner was praised at the Consumer Electronics Show. [2] In 1981, the FM-2 with digital tuning was ...
PS audio offered the PCA II preamplifier. This was discontinued and replaced with the GCP-200 preamplifier. Each had an optional phono stage and external power supply option. For amplifiers, PS audio offered the HCA-2 "digital" amplifier. This was a switching amplifier (many would call this a Class D Amplifier) that provide about 150 watts per ...
PSL(2, 2) is isomorphic to the symmetric group S 3, and PSL(2, 3) is isomorphic to alternating group A 4. In fact, PSL(2, 7) is the second smallest nonabelian simple group, after the alternating group A 5 = PSL(2, 5) = PSL(2, 4). The number of conjugacy classes and irreducible representations is 6. The sizes of conjugacy classes are 1, 21, 42 ...
The decibel unloaded reference voltage, 0 dBu, is the AC voltage required to produce 1 mW of power across a 600 Ω impedance (approximately 0.7746 V RMS). [2] This awkward unit is a holdover from the early telephone standards, which used 600 Ω sources and loads, and measured dissipated power in decibel-milliwatts ( dBm ).
[2] For a given output voltage swing, the lower the impedance the higher the amplifier load. Bridging is used to allow an amplifier to drive low loads into higher power, because power is inversely proportional to impedance and proportional to the square of voltage, according to the equation = /. This equation also shows that bridging quadruples ...
The center channel also anchors the sound field, eliminating phantom images such as those that plagued early matrixed quadraphonic sound if the speakers were not precisely placed. [2] The center channel eliminates the need to create a phantom center with left and right stereo speakers. The center channel provides image stabling effects and is ...
The company was known for the most powerful audio amplifiers of the era led by the Phase Linear D-500 introduced in 1978. It was a stereo power amplifier delivering 505 watts of clean (typically < 0.1% total harmonic distortion over 20 Hz–20 kHz) RMS power per channel. It had a retail price of $1395. Buyout
Seven News (stylised 7NEWS) is the television news service of the Seven Network and, as of 2021, the highest-rating in Australia. [1]National bulletins are presented from Seven's high definition studios in South Eveleigh, Sydney, while its flagship 6 pm statewide bulletins are produced in studios based in Sydney, Melbourne, Brisbane, Adelaide, and Perth.
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