Sunday, March 06, 2005
Amplifiers Part One
The pre-amp tube is what amplifies the electric guitar's tiny signal and amplifiers tonal range and the power tube amplifies the signal into audible sound that is sent through the speaker.
Class A denotes that the power tube is running at peak power continuously. Usually these amps have one or two power tubes. A class AB guitar amp has two to four power tubes that alternate duty so that while one or two are "on" the other one or two are "off". The first preamp tube in this type of amp is called a Phase Splitter and is designed to send alternate the signal between the power tubes.
My Deluxe Reverb pumped out 22 watts into a 12" Jensen speaker. I cranked it to 10 to be heard in the garage bands. Most of my friends owned Super Reverbs. These were rated at 40 watts and had 4 - 10" speakers. There were some more bells and whistles on a Super. It had a midrange control and a bright switch. It was heavy and bulky.