An effects unit, effects processor, or effects pedal is an electronic device that alters the sound of a musical instrument or other audio source through audio signal processing.
A guitar amplifier is an electronic device or system that strengthens the electrical signal from a pickup on an electric guitar, bass guitar, or acoustic guitar so that it can produce sound through one or more loudspeakers, which are typically housed in a wooden cabinet. A guitar amplifier may be a standalone wood or metal cabinet that contains only the power amplifier circuits, requiring the use of a separate speaker cabinet–or it may be a combo amplifier, which contains both the amplifier and one or more speakers in a wooden cabinet. There is a wide range of sizes and power ratings for guitar amplifiers, from small, lightweight practice amplifiers with a single 6-inch speaker and a 10-watt amp to heavy combo amps with four 10-inch or four 12-inch speakers and a 100-watt amplifier, which are loud enough to use in a nightclub or bar performance.
Peavey Electronics Corporation is a privately-owned American company which designs, develops, manufactures, and markets professional audio equipment. Headquartered in Meridian, Mississippi, Peavey is one of the largest audio equipment manufacturers in the world.
Orange Amps is an English amplifier manufacturing company, noted for their products' distinctive sound and the bright orange Tolex-like covering of their heads and speaker cabinets. The company was founded in 1968 by Cliff Cooper, who decided to build his own amplifiers when vendors refused to supply his West End musical instrument store, Orange Store, due to Cooper's youth and countercultural image. Cooper also founded related companies, including the Orange record label in 1969.
Mesa/Boogie is an American company in Petaluma, California, that manufactures amplifiers and other accessories for guitars and basses. It has been in operation since 1969.
Ampeg is a manufacturer best known for its bass amplifiers.
Dumble was a guitar amplifier manufacturer in Los Angeles, California.
Tone King is a manufacturer of vacuum tube guitar amplifiers and stand-alone attenuators located in Baltimore, Maryland, U.S. Tone King was founded by Mark Bartel in 1993 in Kingston, New York, after studying vintage fender amplifiers with blues guitarist Ben Prevo. In 1994 Mark moved the company to Baltimore. Tone King is one of the boutique "vintage" amplifier companies making Fender style amps. Tone King was owned by the company Premier Builders Guild (PBG). In 2016 PBG went out of business and sold the Tone King brand to Boutique Amps Distribution (BAD), which now manufacturers these amps in Huntington Park, California.
Reverend Musical Instruments, commonly known as Reverend Guitars, is an American manufacturer of electric guitars and basses. The company was established in 1997 in Detroit, Michigan by noted guitar and amplifier technician Joe Naylor, a graduate of the Roberto-Venn School of Luthiery. Reverend guitars are known for their combination of unorthodox construction methods, retro design, playability and affordable price.
Seymour Duncan is an American company best known for manufacturing guitar and bass pickups. They also manufacture effects pedals which are designed and assembled in United States. Guitarist and luthier Seymour W. Duncan and Cathy Carter Duncan founded the company in 1976, in Santa Barbara, California.
Soldano Custom Amplification is a guitar amplifier manufacturing company, founded in 1986 by Michael Soldano in Los Angeles, California and later relocated to Seattle, Washington. It is mostly known for high-gain amps such as its flagship model, the Soldano SLO-100.
Bogner Amplification is an American guitar amplifier manufacturing company founded by Reinhold Bogner in 1989 in Los Angeles, California. Bogner began by custom-building boutique amplifiers based on classic Fenders and Marshalls, and now offers different models of serially produced amplifiers.
Boutique amplifier is a catch-all descriptor for any type of instrument amplifier that is typically hand built with the intention of being much better than the mass-produced variety offered by large companies. In the majority of cases, this is reflected in the price. Sometimes they are clones of older designs, often with minor improvements or alterations in layout or circuit design; sometimes they are new designs altogether.
The Vox AC30 is a guitar amplifier manufactured by Vox. It was introduced in 1958 to meet the growing demand for louder amplifiers. Characterised by its "jangly" high-end sound it has become widely recognized by British musicians and others, such as George Harrison and John Lennon of the Beatles, Bill Wyman of the Rolling Stones, Brian May of Queen, Dave Davies of the Kinks and Hank Marvin.
Distortion and overdrive are forms of audio signal processing used to alter the sound of amplified electric musical instruments, usually by increasing their gain, producing a "fuzzy", "growling", or "gritty" tone. Distortion is most commonly used with the electric guitar, but may also be used with other electric instruments such as electric bass, electric piano, synthesizer and Hammond organ. Guitarists playing electric blues originally obtained an overdriven sound by turning up their vacuum tube-powered guitar amplifiers to high volumes, which caused the signal to distort. While overdriven tube amps are still used to obtain overdrive, especially in genres like blues and rockabilly, a number of other ways to produce distortion have been developed since the 1960s, such as distortion effect pedals. The growling tone of a distorted electric guitar is a key part of many genres, including blues and many rock music genres, notably hard rock, punk rock, hardcore punk, acid rock, and heavy metal music, while the use of distorted bass has been essential in a genre of hip hop music and alternative hip hop known as "SoundCloud rap".
Dr. Z Amplification is an American manufacturer of boutique guitar amplifiers.
Blackstar Amplification is a British company that produces and manufacturers guitar amplifiers and effects units. The company was founded by a group of ex-Marshall employees, most notably Bruce Keir, who became technical Director at Blackstar, and former Chief Design Engineer at Marshall, Ian Robinson. In 2009 the company began operations in the United States. The majority of the research and development for Blackstar is carried out in the UK. Blackstar is endorsed by major artists like Ozzy Osbourne, Neal Schon, Opeth, and Richie Sambora of Bon Jovi. Blackstar has been consistently ranked amongst the best amplification brands by leading guitarists. Bruce Keir died in September 2021 at the age of 60.
Fryette Amplification of North Hollywood, California is a manufacturer of hand-built electric guitar amplifiers, speaker cabinets, power amplifiers, sound effects pedals and pedalboard accessories. The company was founded as VHT Amplification in Studio City, Los Angeles, California by Steven Fryette in January 1989 and was the first to produce a true three-channel vacuum tube amplifier.
Jim Kelley Amplifiers is the trademark for the vacuum tube guitar amplifiers designed by Jim Kelley and manufactured by his company Active Guitar Electronics of Tustin, California between the years of 1978 and 1985. Approximately 600 of these amps were built during that time. The single-channel version of the amplifier employed modest gain in the preamp stages, Baxandall type bass and treble controls, a split load phase inverter, and four 6V6GT output tubes. The amplifiers produce 60 watts RMS at full power, and include a half power (30/60) switch.
Friedman Amplification is an American company that produces guitar amplifiers, electric guitars, and related accessories. Founded in 2008 by Dave Friedman, the company has become a popular boutique amp maker.
