This provides the ability to “mix and match” different heads and cabs easily, be it for tonal reasons or simply convenience. A head is the amplifier itself, and a speaker cabinet houses the speaker(s) separately for the head to connect to. The chassis holds the circuitry (and tubes if a tube amplifier) which connects to the speaker within the unit via speaker cable. Head and CabinetĪ combo is an amplifier and speaker contained within one physical package. By pressing a button you switch to a different portion of the amplifier for higher gain. A channel switching amplifier will allow you to have two distinct sounds, most commonly clean and overdriven. Any overdrive would be accomplished by increasing the gain and/or volume on the one channel. With a single channel amplifier, you are most often dealing with one type of sound which is generally a clean tone. Generally, higher wattage amps have more “headroom”. “Headroom” is the term used to describe the amount of volume an amplifier can produce before it distorts. Power amp tubes are responsible for volume and clean headroom - the output signal. The second stage in generating signal to the speakers. Preamp tubes are responsible for input signal - volume and tonality of the electric guitar that is then sent to the power amp section of the amplifier.
The first stage in generating signal to the speakers. How your amp responds to playing dynamics and touch sensitivity. Input gain corresponds to overdrive, and output gain corresponds to overall volume level.
GAINĮssentially the “loudness” of your amplifier. Class ABĬlass A - Always running, quick response, quicker breakup, richer upper secondary harmonics BUT shorter tube life, less efficient, lower maximum volumes.Ĭlass AB - Idles at lower voltages/more efficient, higher power, more “headroom”, more low end bass response, longer tube life BUT slower response time, possibly less harmonic. Most Fender and Marshall amps are class AB while Vox amps are generally Class A. These could never operate in true class A. Think about your 100 watt Marshall and Orange amps. Push-Pull class AB amps are far more efficient and capable of producing significantly more power. Single-ended class A amps (one straight signal path from tube to tube) are generally 5-10 watts. Meanwhile, in a true class A amp, each power tube is responsible for the entire wave itself. The tubes in a class AB push-pull amp are out of phase so each singular tube is only responsible for 50% of the sound wave. On the converse, extremely high voltage is required and the amp runs rather inefficiently.Ĭlass AB amplifiers use pairs of tubes working in conjunction with each other to accomplish the amplification. The positive side of that is the tubes are always “ready to go”. While this section could be a novel in itself, the very simple explanation for this is as follows:Ĭlass A amplifiers run constant power through the tubes, even when there is no note being played, so the amp is always “idling” around 50% power. Solid state amps are cheaper to make and operate while tube amps can be more expensive and all require maintenance to perform optimally. Their harmonics, warmth, articulation, and speed are imitated by solid state amps but never quite duplicated. Tube amplification provides a significantly more satisfying musical experience. Digital modelers are solid state amps that have built in digital effects processors to allow the user to simulate different amps and effects all from one unit. Tube amps use tubes to amplify signal, while solid state amps use solid state components to amplify signal.
an electronic device for increasing the amplitude of electrical signals, used chiefly in sound reproduction Tube Vs. Russo Music is has your back when it comes to knowing your knobs. We’ll cover different amplifier types, tubes, tones, effects, signal flow, and everything in between.
#Sound control knobs how to#
We’re here to help clarify the rights, wrongs, myths, grey areas, dos, don’ts, and give you a grounded understanding on how to utilize your beloved gear in the best way.
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