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| Electric Guitar Amps Electric Guitar Amps | ||
 Electric guitars do not produce any audible sounds, they have electro-magnetic "Pickups" that convert the vibration of the strings into an electrical signal. The electric guitar is plugged into an Amplifier (Amp), which produces sounds from the vibration signal it receives. All electric guitars require an amp or other electric amplification device. Acoustic-electric guitars, however, do make audible sounds - as they are essentially acoustic guitars with a built in pickup microphone. You can plug an acoustic-electric guitar (this instrument is used in every form of music, from Classical to Heavy Metal) to an amp to increase the volume, or to use guitar effects with it. Guitar amps are rated in Watts, which is the amount of power they draw. The amount of power is directly proportional to the volume level a guitar amp is capable of; the higher the wattage, the louder the amp. For home use a 10 or 20 Watt amp should be sufficient. Concert halls use multiple 1000+ Watt amps, but they are huge spaces. Guitar amps have a speaker in the casing; and amps with higher power ratings have larger speakers, which increases the overall size of the amp case. You may have noticed huge stacks of speakers behind your favorite rock guitarist (see picture above). 
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 The original guitar amps (and all electronic devices of that day) used Vacuum Tubes, which were the precursors to our modern day miniature transistor. Vacuum tubes were delicate (they were made of glass) and prone to overheating. Today, most guitar amps are "solid state" - using transistors and other silicon chip technology that is sturdy and uses less power. However, the sound quality from a tube amp is far superior to modern solid state amps - so tube amps are still available. Today's tube amps tend to be more expensive, and cost more to maintain (in replacing burnt out vacuum tubes) - they are usually the choice of professional musicians. For home and hobby use, cheaper solid state guittar amps are just fine. 
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 Several types of guitar amps are available today, and come with many features and effects built-in. Volume and tone controls, of course, are standard - that is how you control the amount and tone of sound. The Reverb effect is available in many guitar amps, this simple and elegant effect provides a warmth to guitar music. Another effect that is commonly available in guitar amps is the Distortion effect. Using Pre and Post Gain controls, guitarists can alter the sound of their guitar - from a flat "thunk" to a screeching "wail". If you are lucky enough to have a spouse that also plays guitar, some amps have Dual input jacks - so both of you can play together. For the opposite case, where the spouse keeps yelling at you to TURN THAT DARN THING DOWN, some amps have a Headphone jack - so you can plug in and tune out. Can you dig it? I knew that you could. And for those play-along guitarists, some amps have a CD Input jack - so you can plug your CD player in and play along with your favorite music. Guitar Effects<<<Previous Next>>>Guitar Care
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| Acoustic Guitar Parts Acoustic Guitar Parts | ||
Here is a picture of a typical acoustic guitar with its parts marked. Scroll down for detailed information on the acoustic guitars parts. 
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 There are three main sections zoomed in the picture; the Headstock, the Neck, and the Body. The headstock holds the Tuner Posts around which the strings are wrapped and terminated. The Tuners are knobs that increase or decrease the tension on the string wrapped around the tuner posts (tuning the sound made by the strings). Note that some acoustic guitars may have different looking tuners, and some may even have all six tuner keys on the same side. Even though they may look different, they work in the same manner. The Nut guides the strings to the tuner posts and maintains the height of the strings. The length of the Neck depends on the scale of the guitar and the number of frets it has. The back of the neck could be "C" shaped, or "V" shaped (sideways < if you compare it to the letter C). The front of the neck is the Fingerboard or Fretboard, that contains the Frets embedded in notches along its surface. The Strings run down the neck over the frets. The height of the strings over the frets is called the Action; if the action is too high the strings are harder to press down, if the action is too low the strings may rattle against the frets muffling the notes. The neck usually has "dot" markers on the top and the side facing the player, showing the position of the 3rd, 5th, 7th, 9th, 12th (which has two dots) and 15th fret.
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On standard acoustic guitars, the large body makes it difficult to use any frets above the 12th fret. Some guitars have a Cutaway section to allow your hands to reach the 14th fret easily, however this does affect the sound as it disrupts the shape of the guitar. You strum (or pick) the strings over the Soundhole, which is where the vibrations from the strings are acoustically reflected out providing the sound from the instrument. Acoustic-electric guitars have an Pickup inside the soundhole, note that you can also buy add-on acoustic pickups and turn any acoustic guitar into an acoustic-electric. Most acoustic guitars have a Pick Guard, that protects the finish on the top of the guitar body from mis-directed picking. The strings terminate in the Saddle which is glued onto the top of the guitar body. The Bridge raises the strings and establishes the Action of the guitar. Note most accustic guitars have "fixed" bridges, the only way to lower the action is to shave or cut down the saddle (or replace the bridge) - there is no way raise the action. Some newer models provide adjustable bridges simliar to electric guitars.
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Note that as an accoustic guitar ages, a pronounced "belly" or bump will appear on the top of the body, just below the saddle. Since the strings are constantly pulling on the saddle, over time and with humidity changes the wood will begin to bow where the pressure is being applied. There are "ribs" or "struts" inside the body to prevent the saddle from being ripped out, so a small belly is perfectly normal as the guitar is broken in. If the belly gets too large you will have to have the ribs inside the top repaired, they may have popped out or broken. Many musicians claim the belly improves the sound of the guittar, which may contribute to the theory that acoustic guitars sound better as they grow older. Guitar Types<<<Previous Next>>>Electric Guitar Parts
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Additional pages about Electric Guitar Amps
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