| 31. | By 1998, the NAD 3020 had become the most well known and best-selling audio amplifier in history.
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| 32. | Valve audio amplifiers typically amplify the entire audio range between 20 Hz and 20 kHz or higher.
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| 33. | Most professional audio amplifiers also provide protection from overdriven signals, short circuits across the output, and excessive temperature.
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| 34. | The film editor may have a soundtrack on one gang, which can be read with an audio amplifier.
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| 35. | In the audio amplifiers the resistive load ( loudspeaker ) is coupled via a transformer to the amplifier.
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| 36. | :As regards audio amplifier power ratings, that is just the maximum rated power output for the speaker drive.
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| 37. | Beam tetrodes have remained in use until quite recently in power applications such as audio amplifiers and radio transmitters.
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| 38. | The blue box consisted of a set of audio oscillators, a telephone keypad, an audio amplifier and telephone operators.
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| 39. | Two 833A's are capable of approximately 800 watts sine wave power in a class B audio amplifier or modulator.
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| 40. | The non-linear operating characteristic of the triode caused early tube audio amplifiers to exhibit harmonic distortion at low volumes.
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