11. BMS phonographs lacking a power amplifier or internal speaker could have an optional preamplifier . 12. Instruments may be built with an internal preamplifier , or may put out a overdrive. 13. Often such harps include an onboard preamplifier . 14. It is typical for a mixing board to include a line trim after the preamplifier . 15. A : The best way to do this is to buy a device called a preamplifier . 16. This eliminated the need for a preamplifier triode in radios, making them cheaper to produce. 17. The preamplifier molecule has two domains. 18. Microphones typically need to be connected to a preamplifier before the signal can be recorded or reproduced. 19. Microphones also need some type of microphone preamplifier to prepare the signal for use by other equipment. 20. A common setup is the use of a tube preamplifier with a solid-state power amplifier.
