Guitar Amplifiers & Cabinets

Guitar Amplifier 101

A guitar amplifier is a device that amplifies the signal from a guitar. In other words, it strengthens the audio signal from a source such as an electric, acoustic, or bass guitar. The altered signal is then expressed through a loudspeaker, typically cased in a metal or wooden cabinet. Usually, built-in guitar amplifier devices further modify the signal. Some of these are equalizers that change the signal's tone by emphasizing or de-emphasizing specific frequencies as well as various dynamic, distortion, and reverb effects.  

In the Beginning

The birth of amplifiers originated from the telephone and radio broadcast industry in the 1910s. It was not until 1930 that the first practical electric guitar and amplifier took form. Electro String Instrument Company developed these amplifiers. Shortly after, other companies like National, Dobro, Gibson, and Rowe-DeArmond presented their versions of guitar amplifiers that found wide commercial use among consumers. The WW2 shortly stopped the further development of guitar amplifiers. However, in the late 1940s, many new companies and individuals began to make amplifiers. In 1947, Leo Fender founded his Fender Musical Instrument Company. Fender amplifiers became known for their ruggedness and power, quickly dominating the market. Moving forward in time, with the birth of Rock & Roll, the demand for bigger and louder sound and sound systems got emphasized, so new and better solutions for guitar amplifiers came to light. At this point, tube and solid state-based amplifiers emerged.  

Guitar Amplifier Structure

The usual structure of the guitar amps consists of, most commonly, two amplifier circuit stages with an addition of the circuits for tone shaping. Furthermore, more expensive amplifiers can contain additional control for more frequency ranges, such as mid-range frequency controls and "presence "control for the high-frequency content of the signal. When it comes to the configuration of the guitar amplifiers, there are usually two options. First is a combination or combo, which incorporates an amplifier and one or more speakers in the cabinet. The other type is a standalone amplifier - "amp head ". It does not include the speaker. The signal passes the amplifier via a speaker cable to one or more external speaker cabinets. Speaker configurations in cabinets come in a wide variety, ranging from cabinets with a single speaker ( 1*10, 1*12 ) to multiple speakers ( 2*10. 4*10. 12.10 ).  

Vacuum Tube

Vacuum Tube amplifiers dominated the market until the 1970s when Solid-state-based types took over. One of the main reasons is that amplifier tube components overheat pretty quickly. Therefore, they become useless over time. On the other hand, tube amplifiers deliver a more natural and "warm "sound, so audio enthusiasts still use them today.  

Solid Slate Amp

Solid-state amplifiers consist of semiconductor (solid-state) circuits. They are considerably less expensive and more reliable than tube amplifiers. Some Jazz guitarists prefer this amplifier since it produces a much "cleaner sound." They also vary in output power, size, price, and sound quality.  

Modeling Amp

Modeling amplifiers use microprocessor technology that allows digital onboard effects in guitar amps to create numerous sounds and tones that simulate the sound of a range of tube amplifiers and other sized speaker cabinets, all using the same amplifier and speaker. They can be programmed to simulate the characteristics of the tones of the variety of amplifier models as well as speaker cabinets and even the different microphone placements.