| 41. | GSA AUDIO produces various model of microphones ( condenser, dynamic, tube ) and a microphone preamplifier : the Vitrum 501
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| 42. | The units represent incremental improvements in the flexibility of programming and a better preamplifier, which acts as an early sound filter.
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| 43. | Especially at microwave frequencies, a receiving antenna may include not only the actual electrical antenna but an integrated preamplifier or mixer.
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| 44. | A "'microphone preamplifier "'is a gain while preventing induced noise that would otherwise distort the signal.
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| 45. | The company makes a preamplifier, which controls the audio signal from the accessories, and an amplifier, which drives the speakers.
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| 46. | First of all a rewardingly musical preamplifier, the model 7.0 is a precise and eminently listenable surround processor as well.
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| 47. | Most have two volume controls : a first volume control called " preamplifier " or " gain " and a master volume control.
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| 48. | The preamplifier helps to ensure that the impedance of the pickup signal matches the impedance of the amplifier, which improves the tone.
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| 49. | After the microphone, the signal passes down a cable to the microphone preamplifier, which amplifies the microphone signal to line level.
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| 50. | Here, the still-mic-level signal enters into a microphone preamplifier, which boosts the signal voltage to line level.
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