Smith added an extra tube gain stage to the preamp, with three variable gain controls at different points in the circuit (what is now called a "cascaded" design), creating the first high-gain amplifier.He set about designing a guitar amplifier around the new principle, and in 1972 the Mark I was released.Quantum dots exhibit properties that are intermediate between those of bulk semiconductors and those of discrete molecules.Their optoelectronic properties change as a function of both size and shape.After building about a dozen of the early heads, Smith yearned for something more, and experimented until he developed the high-gain cascading pre-amp, multiplying the normal amplifier gain by 50. The Mesa Boogie Mark Series is a series of guitar amplifier made by Mesa Engineering (more commonly known as "Mesa/Boogie").
Dating an amplifier by serial numbers can be effective as well.
Again, it's important to be sure the parts are original on the music equipment to get a valid date for the amp.
Many tube amplifiers will have a tube chart within the amp itself.
We trace the evolution of the Mesa Boogie product line from the humble beginnings in a converted dog kennel to the newest Express line.
Randall Smith begins modifying Fender Princeton amps as a practical joke on a friend and the first high-powered 1x12 combo is born.