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Power Attenuator (guitar)
A power attenuator, used with a guitar amplifier, is a type of attenuator that diverts and dissipates a portion of the amplifier's power to enable hearing the amplifiers high-volume characteristics at lower volume. Explanation Musicians playing through vacuum tube guitar amplifiers sometimes want to produce distortion by overdriving the amplifier's output stage. Under such a condition, the amplifier is close to or at its maximum output power. The resulting volume level is unsuitable for many playing conditions. By reducing the power to the speaker, a power attenuator reduces the volume without altering the overdriven quality of the tone. The most common approach to power attenuation is a ''power soaker'', which absorbs a portion of the power and dissipates it as heat. This device connects between the amplifier output and the guitar speaker. A typical attenuator circuit is the L pad. A variable L pad is a power divider circuit that provides an adjustable power level to a speake ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1969 Marshall JMP 1959 Super Lead Plexi 100W With New Tlex
1969 (Roman numerals, MCMLXIX) was a common year starting on Wednesday of the Gregorian calendar, the 1969th year of the Common Era (CE) and ''Anno Domini'' (AD) designations, the 969th year of the 2nd millennium, the 69th year of the 20th century, and the 10th and last year of the 1960s decade. Events January * January 4 – The Government of Spain hands over Ifni to Morocco. * January 5 – Ariana Afghan Airlines Flight 701 crashes into a house on its approach to London's Gatwick Airport, killing 50 of the 62 people on board and two of the home's occupants. * January 14 – USS Enterprise fire, An explosion aboard the aircraft carrier USS Enterprise (CVN-65), USS ''Enterprise'' near Hawaii kills 28 and injures 314. * January 16 – First successful docking of two crewed spacecraft in orbit and the first transfer of crew from one space vehicle to another (by a space walk) between Soviet craft Soyuz 5 and Soyuz 4. * January 18 – Failure of Soyuz 5's service module to separ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Capacitance
Capacitance is the ability of an object to store electric charge. It is measured by the change in charge in response to a difference in electric potential, expressed as the ratio of those quantities. Commonly recognized are two closely related notions of capacitance: ''self capacitance'' and ''mutual capacitance''. An object that can be electrically charged exhibits self capacitance, for which the electric potential is measured between the object and ground. Mutual capacitance is measured between two components, and is particularly important in the operation of the capacitor, an elementary linear electronic component designed to add capacitance to an electric circuit. The capacitance between two conductors depends only on the geometry; the opposing surface area of the conductors and the distance between them; and the permittivity of any dielectric material between them. For many dielectric materials, the permittivity, and thus the capacitance, is independent of the potential ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electric Guitars
Electric Guitars were an English band formed early in 1980 by Neil Davenport (vocals, lyrics) and Richard Hall (bass, vocals) who were both studying English at Bristol University. The band soon increased to a five-man line-up, with Andy Sanders (guitar, vocals), Matt Salt (drums) and Dick Truscott (keyboards), they also later added two backing singers: Sarah and Wendy Patridge. Their first single "Health" / "Continental Shelf" was released on local label Fried Egg Records in 1980. They contributed four live tracks to the first edition of '' The Bristol Recorder'' in 1980, and in 1981 released their second single "Work" / "Don’t Wake the Baby" on Recreational Records, which reached No. 45 on the UK Indie Chart. They toured as support to The Thompson Twins, which brought them to the attention of Stiff Records, who promptly signed them up. The band's first single for Stiff was "Language Problems" in 1982, and this was followed by an EP in the same year, from which Toni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Soundproofing
Soundproofing is any means of impeding sound propagation. There are several methods employed including increasing the distance between the source and receiver, decoupling, using noise barriers to reflect or absorb the energy of the sound waves, using damping structures such as sound baffles for Absorption (acoustics), absorption, or using active anti-noise sound generators. Acoustic quieting and noise control can be used to limit unwanted noise. Soundproofing can reduce the transmission of unwanted direct sound waves from the source to an involuntary listener through the use of distance and intervening objects in the sound path (see sound transmission class and sound reduction index). Soundproofing can suppress unwanted indirect sound waves such as Reflection (physics), reflections that cause Echo (phenomenon), echoes and resonances that cause reverberation. Techniques Absorption Sound-absorbing material controls reverberant sound pressure levels within a cavity, enclosure o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isolation Cabinet (guitar)
A guitar speaker isolation cabinet is a sound-proof enclosure that surrounds the speaker and sound-capturing microphone and prevents sound leakage into the outside environment, enabling the guitar amplifier to be turned up without excessive listening volume. An amplifier and speaker at full volume can be extremely loud, posing a Noise health effects, risk to hearing and an annoyance to neighbors, and will often drown out other instruments in a Audio mixing, mix in live shows. In a recording studio, the sound of an amplifier at full volume may Spill (audio), spill into the microphones for other instrumentalists. The characteristic sound of a Vacuum tube, tube guitar amplifier as heard on the majority of professional recordings is achieved by playing the amplifier at high volumes and using one or more microphones to capture the sound. Turning the volume up causes the pre-amplifier to clipping (audio), overdrive and it drives the power amplifier into distortion and the loudspeaker to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Distortion (guitar)
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 be used with other 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. 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, grunge and heavy metal music, while the use of distorted bass has been essential in a genre of hip hop music and alternative hip hop know ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guitar Amplifier
A guitar amplifier (or amp) is an electronic amplifier, electronic device or system that strengthens the electrical signal from a Pickup (music technology), 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 speaker enclosure, cabinet. A guitar amplifier may be a standalone wood or metal cabinet that contains only the power amplifier (and preamplifier) 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. Guitar amplifiers can also modify ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Power Scaling
Power scaling of a laser is increasing its output power without changing the geometry, shape, or principle of operation. Power scalability is considered an important advantage in a laser design. This means it can increase power without changing outside features. Usually, power scaling requires a more powerful laser pumping, pump source, stronger cooling, and an increase in size. It may also require reduction of the background loss in the optical resonator, laser resonator and, in particular, in the gain medium. Master Oscillator Power Amplifier (MOPA) One way of achieving power scalability is the MOPA approach. The master oscillator (a seed laser to be amplified) produces a highly coherent beam, and an optical amplifier is used to increase the power of the beam while preserving its main properties. The master oscillator has no need to be powerful, and has no need to operate at high efficiency because the efficiency is determined mainly by the power amplifier. The combination of seve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
THD Electronics
THD Electronics, Ltd. is a manufacturer of amplifier accessories, and a former manufacturer of vacuum-tube guitar amplifiers. It is located in Seattle, Washington. It was founded in 1986 by President and CEO Andrew Marshall. At one time specializing in hand-built, vacuum tube “boutique”-style amplifiers, it continues to manufacture the “world’s best selling uitar amplifier power attenuator,”Guppy, Nick. “Pure Gold.” ‘ ‘Guitarist.’ ’ March 2004: p. 85. the THD Hot Plate. The company is well known in the boutique amplifier market, and is often credited with the creation of this market in the United States.Buddingh, Terry. “The Flexi-50” ‘ ‘Guitar Player.’ ’ December 2004: p. 169. THD's line of products stayed relatively small despite its 22-year history as a company. Of its amplifiers, THD made three: the UniValve, BiValve-30, and Flexi-50. Name origins Copyright issues prevented Marshall from naming THD Electronics after himself, as Marshall Ampli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marshall Amplification
Marshall Amplification is a British company that designs and manufactures music amplifiers, Guitar speaker cabinet, speaker cabinets, and effects unit, effects pedals. Founded in London in 1962 by shop owner and drummer Jim Marshall (businessman), Jim Marshall, the company is based in Bletchley, Milton Keynes, England. The company first began making amplifiers to provide an alternative to expensive, American-made Fender (company), Fender amps, releasing their first model, the Fender Bassman, Bassman-inspired Marshall JTM45, JTM45, in 1963. Following complaints over limitations in amp volume and tone from visitors to Jim Marshall's drum shop, notably Pete Townshend, guitarist for The Who, Marshall began developing louder, 100-watt amplifiers. These early amps were characterized in part by their Plexiglass control plates, leading to models such as the Marshall 1959, 1959 Super Lead (released in 1965) being popularly known as "Plexis." Their adoption by guitarists like Townshen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jim Kelley Amplifiers
__NOTOC__ 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. An improved version of the single-channel amp was released in 1980 which included reverb, an additional stage of gain, and optional foot switchable gain boost. These guitar amps were the first to employ a matched quartet of Sylvania 6V6GT output tubes. The amps were offered with hardwood cabinets, or in a variety of vinyl-covered birch plywood cabinets in a variety of colors. The amps were built as 1-12", or 1-10" combos, o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Line-level
Line level is the specified strength of an audio signal used to transmit analog sound between audio components such as CD and DVD players, television sets, audio amplifiers, and mixing consoles. Generally, line level signals sit in the middle of the hierarchy of signal levels in audio engineering. There are weaker signals such as those from microphones (Mic Level/Microphone Level) and instrument pickups (Instrument Level), and stronger signals, such as those used to drive headphones and loudspeakers (Speaker Level). The "strength" of these various signals does not necessarily refer to the output voltage of the source device; it also depends on its output impedance and output power capability. Consumer electronic devices concerned with audio (for example sound cards) often have a connector labeled ''line in'' and/or ''line out''. ''Line out'' provides an audio signal output and ''line in'' receives a signal input. The line in/out connections on consumer-oriented audio equipm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
