Roland Jazz Chorus is the name given to a series of solid-state instrument amplifiers produced by the Roland Corporation in Japan since 1975. Its name comes from its built-in analog chorus effect. The Jazz Chorus series became increasingly popular in the late 1970s and early 1980s new wave and post-punk scenes because of its clean yet powerful sound, durability and relatively low cost when compared to the more commonly used tube amplifiers of the time such as Marshall or Fender. It also found favour amongst funk players in America. [1] It also became popular to use for clean tones in heavy metal, with the most famous users being James Hetfield and Kirk Hammett from Metallica, and Wes Borland from Limp Bizkit.
Most models have controls based on the JC-120's standard setup. There are two channels, one clean, the other with effects. The built-in effects include stereo chorus, vibrato, reverb, and distortion. The amplifier features high and low inputs, a bright switch as well as a three band equalizer and volume for each channel.
Since its inception in 1975, the Roland Jazz Chorus amplifier has undergone several design iterations.
1975 JC-120, 120 watts, 2x12" speakers; JC-60, 60 watts, 1x12" speaker
1976 JC-160, 120 watts, 4x10" speakers; JC-80 60 watts, 1x15" speaker
1978 JC-200, 200W (head); JC-200S, 2x12" speakers (cabinet);
1979 JC-50, 50 watts, 1x12" speaker
1984 JC-120H, 120W head (“Bright” switch changed to “HI-TREBLE”); JC-77, 80 watts, 2x10" speakers
1986 JC-55, 50 watts, 2x8" speakers
1992 JC-20, 20 watts, 2x5" speakers
1996 JC-85, 80 watts, 2x10" speakers
1997 JC-90, 80 watts, 2x10" speakers (Eminence speakers)
2015 JC-40, 40 watts, 2x10’’, (introduced stereo input); JC-22, 30 watts, 2x6.5" speakers [2]
2016 JC-22, 30 watts, 2x6.5" speakers
The Jazz Chorus is one of the most famous and successful combo amplifiers from its period and its earliest users included Albert King, Andy Summers (The Police), Chuck Hammer (Lou Reed), Larry Coryell, Robert Smith (of The Cure, although he used the rarer 160 Watt JC-160 with 4 x 10" speakers), Billy Duffy (The Cult, Theatre of Hate), Roger Hodgson of Supertramp, Joe Strummer, John Sebastian of The Lovin' Spoonful, Art Saiz, Chuck Willis, Prince, John McGeoch (Magazine, Siouxsie and the Banshees, PIL, the Armoury Show), Steve Hackett, Robert Fripp, Adrian Belew, Steve Rothery, Mdou Moctar, Neil Halstead (Slowdive) [3] and Wayne Hussey (the Sisters of Mercy, The Mission) among others. Summers' use of the amp in turn inspired, for instance, Jeff Buckley, whose first amplifier was a Jazz Chorus. [4]
Another notable user of the JC-120 was Johnny Marr of The Smiths who used the Roland JC-120 along with his Rickenbacker 330 and Telecaster to create the sounds present on The Smiths’ debut album. Other users include Steve Levine, producer of bands such as Culture Club, The Beach Boys and The Clash. He often combined it with effects pedals from Boss Corporation, a Roland subsidiary. [5]
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.
Roland Corporation is a Japanese multinational manufacturer of electronic musical instruments, electronic equipment, and software. It was founded by Ikutaro Kakehashi in Osaka on 18 April 1972. In 2005, its headquarters relocated to Hamamatsu in Shizuoka Prefecture. It has factories in Malaysia, Taiwan, Japan, and the United States. As of December 2022, it employed 2,783 people. In 2014, it was subject to a management buyout by its CEO, Junichi Miki, supported by Taiyo Pacific Partners.
An instrument amplifier is an electronic device that converts the often barely audible or purely electronic signal of a musical instrument into a larger electronic signal to feed to a loudspeaker. An instrument amplifier is used with musical instruments such as an electric guitar, an electric bass, electric organ, electric piano, synthesizers and drum machine to convert the signal from the pickup or other sound source into an electronic signal that has enough power, due to being routed through a power amplifier, capable of driving one or more loudspeaker that can be heard by the performers and audience.
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.
Boss is a manufacturer of effects pedals for electric guitar and bass guitar. It is a division of the Roland Corporation, a Japanese manufacturer that specializes in musical equipment and accessories. For many years Boss has manufactured a wide range of products related to effects processing for guitars, including "compact" and "twin" effects pedals, multi-effect pedals, electronic tuners and pedal boards. In more recent times, Boss expanded their product range by including digital studios, rhythm machines, samplers and other electronic music equipment. They also are now manufacturing solid-state amplifiers and speaker heads such as the Waza and the Katana. Both feature multi-effects units meant to emulate Boss' classic effects pedals.
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.
Marshall Amplification is a British company that designs and manufactures music amplifiers and speaker cabinets. Founded in London by shop owner and drummer Jim Marshall, the company is based in Bletchley, Milton Keynes, England. Since March 2023, Marshall Amplification has been one of several divisions of the Swedish conglomerate, the Marshall Group.
Scholz Research & Development, Inc. was the name of the company founded by musician and engineer Tom Scholz to design and manufacture music technology products.
Chorus is an audio effect that occurs when individual sounds with approximately the same time, and very similar pitches, converge. While similar sounds coming from multiple sources can occur naturally, as in the case of a choir or string orchestra, it can also be simulated using an electronic effects unit or signal processing device.
A bass amplifier is a musical instrument electronic device that uses electrical power to make lower-pitched instruments such as the bass guitar or double bass loud enough to be heard by the performers and audience. Bass amps typically consist of a preamplifier, tone controls, a power amplifier and one or more loudspeakers ("drivers") in a cabinet.
AHED was a Canadian company owned by Phil G. Anderson that produced guitar amplifiers, as well as guitars. Its main product line was the GBX amplifier, which could reach 180 watts with 4x10", 4x12" or 2x15" speakers. The GBX amplifier had a pre-amplifier that could change the gain, brilliance, depth, contour and response of the output.
TC Electronic is a Danish audio equipment company that designs and imports guitar effects, bass amplification, computer audio interfaces, audio plug-in software, live sound equalisers, studio and post-production equipment, studio effect processors, and broadcast loudness processors and meters. In August 2015, the company was purchased by Music Group, a holding company chaired by Uli Behringer.
Carr Amplifiers is a Pittsboro, North Carolina, manufacturer of high-end, hand-wired tube guitar amplifiers.
The Line 6 Flextone was the first in a series of guitar amplifiers to package Line 6's POD digital modeling system in a stand-alone amplifier product. Digital modeling allowed users to access guitar tones based on those of many popular vintage and boutique amplifiers. At the time of its release in the late 1990s, the Flextone series was a more affordable alternative to the company's flagship Vetta amplifier.
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.
This is a glossary of jazz and popular music terms that are likely to be encountered in printed popular music songbooks, fake books and vocal scores, big band scores, jazz, and rock concert reviews, and album liner notes. This glossary includes terms for musical instruments, playing or singing techniques, amplifiers, effects units, sound reinforcement equipment, and recording gear and techniques which are widely used in jazz and popular music. Most of the terms are in English, but in some cases, terms from other languages are encountered.
Roland CUBE is a series of guitar and bass amplifiers manufactured and distributed by the Roland Corporation. The CUBE series use amplifier modeling technology.
Traynor is a brand of bass amplifiers and guitar amplifiers, the first brand formed by Yorkville Sound. The Traynor brand, named for founder Peter Traynor, began in 1963 with the Dynabass bass amplifier, a rental product. Traynor first became popular in Canada by providing less expensive versions of the circuits used in Marshall and Fender amplifiers of the time. The revived brand now produces a wide range of electric, acoustic, and bass guitar amps.
A keyboard amplifier is a powered electronic amplifier and loudspeaker in a wooden speaker cabinet used for the amplification of electronic keyboard instruments. Keyboard amplifiers are distinct from other types of amplification systems such as guitar amplifiers due to the particular challenges associated with making keyboards sound louder on stage; namely, to provide solid low-frequency sound reproduction for the deep basslines that keyboards can play and crisp high-frequency sound for the high-register notes. Another difference between keyboard amplifiers and guitar/bass amplifiers is that keyboard amps are usually designed with a relatively flat frequency response and low distortion. In contrast, many guitar and bass amp designers purposely make their amplifiers modify the frequency response, typically to "roll-off" very high frequencies, and most rock and blues guitar amps, and since the 1980s and 1990s, even many bass amps are designed to add distortion or overdrive to the instrument tone.
Komet Amplification Group is an American manufacturer of boutique guitar amplifiers, based in Baton Rouge, Louisiana. According to Guitar Player magazine, many consider them to be "torchbearer for the late Ken Fischer of Trainwreck Circuits", since the company got its start producing the Fischer-designed Komet K60. Since then the company has begun producing models they developed themselves. The Komet Constellation was a unique, 4xEL84 based amp with two independent preamp channels that could be blended seamlessly. The Komet K19 is a 2xEL84 based amplifier with just Volume, Saturation and Tone controls. The K29 is a higher powered, 4xEL84 based version of the same circuit. The Komet Concorde model is a higher gain, more Rock oriented variation of the K60 circuit with solid state rectification. The Komet Aero 33, a single-channel 33-watt amplifier head was a Guitar Player Editors' Pick. Trainwrecks never had their electric components hidden in epoxy however, Komet's Aero 33's resistors and capacitors "are individually concealed in black shrink wrap". In 2009, Premier Guitar reviewed the Komet 19, giving it a 5 out of 5 rating, praising the sound and the "astonishing workmanship".