41. Earlier in his career he occasionally played Gallien-Krueger amplifiers . 42. Remotely pumped amplifiers can be regarded as repeaters without active modules. 43. Fiberoptic amplifiers are based on optical fibers doped with rare earths. 44. The amplifier won first place and effectively helped launch the company. 45. This determines the lower limit of noise of a quantum amplifier . 46. They made four power amplifier units intended for internal use only. 47. Examples of such sources include superluminescent diodes and doped fiber amplifiers . 48. Prevailing wisdom at the time was that all amplifiers sounded alike. 49. Technological breakthroughs in this period included the high-current amplifier . 50. They continued to exchange guitars and amplifiers for subsequent recording sessions.
