Guitar amplifiers usually have several signaling pathways (channels) with different sound characteristics. Clean channels only have a volume adjuster; sometimes it is even combined with a tone setting. Jazz guitar amplifiers channels with more distortion usually has a gain adjuster that affects the strength of distortion degree, coupled with a volume adjuster for the output volume. The channels can be selected by pressing a button on the amplifier. Combos incorporate one or more loudspeakers mounted in a common housing.
Guitar speakers typically have pronounced resonances; the speakers are hung tough and are less attenuated by the high source resistance of tube amplifiers. In contrast, hi-fi speakers convey music signals but do not have their own sound. The resonance behavior of the often open-back wooden housing is another reason for the lower attenuation and the warm sound with pronounced mid-shift. The output stages of tube guitar amplifiers operate mainly in AB mode, that is, it uses one tube to amplify the positive or negative half-wave (push-pull).
They are well suited for practice and game locations without AC power supply. Some combos come with a headset, such as the Rockman, which was developed by Tom Scholz, founder of the rock band Boston, in the 1980s. In traditional amps, there are numerous variations that form pre and power amp of units. These are usually mounted in a 19-inch rack systems. In tube amplifiers, signal electron tubes maybe used.
Nowadays electronics tubes are rarely used due to size, weight, heat generation, long-term stability and complex power supply. The quasi-modular design of modern tube amps (one or two series-connected precursors and a final stage) can create different distortions. The precursors are usually with double triodes, such as ECC81, ECC82 and ECC83.
Chance of additional effects such as chorus and tremolo can be integrated. Guitar amps come in various power levels of about 2 watts (Roland Microcube) reaches over 350 watts (Marshall Mode Four) output power. Greater power outputs are not useful in general, as in bigger stage installations, the instruments are transmitted via the PA system.
Variations in sound may also occur when tubes from different manufacturers are used. They produce different sound, even though their nominal data is identical. This is caused by technical tolerances. Another variation is the hybrid amplifier. Since the eighties, the variant is common in the pre-amp tubes. Hybrid amplifiers can unite transistor preamp and tube power amp.
The auditory impression of distorting tube amp is described as dense, loud, rough and groovy. This sound is important in all areas of rock music and a typical guitar sound is a vital part of music styles of hard rock and heavy metal. This is probably due to the well-configured override behavior and the higher internal resistance.
In some cases, digital signal processors (DSPs) are used to simulate the behavior of tube amplifiers on mathematical models. They are also known as modeling amps. Nowadays, there are numerous guitar amplifiers that use this method of sound production. Because of greater flexibility and range of sounds, this amp is replacing the classic guitar amps. Since 2006, a new generation of guitar amp simulators provides many musicians with advanced acoustic capabilities. Some equipment employ high quality analog-to-digital converters, and processors of high computing power. The dynamics of classic guitar amp is simulated with the help of fractal algorithms.
Guitar speakers typically have pronounced resonances; the speakers are hung tough and are less attenuated by the high source resistance of tube amplifiers. In contrast, hi-fi speakers convey music signals but do not have their own sound. The resonance behavior of the often open-back wooden housing is another reason for the lower attenuation and the warm sound with pronounced mid-shift. The output stages of tube guitar amplifiers operate mainly in AB mode, that is, it uses one tube to amplify the positive or negative half-wave (push-pull).
They are well suited for practice and game locations without AC power supply. Some combos come with a headset, such as the Rockman, which was developed by Tom Scholz, founder of the rock band Boston, in the 1980s. In traditional amps, there are numerous variations that form pre and power amp of units. These are usually mounted in a 19-inch rack systems. In tube amplifiers, signal electron tubes maybe used.
Nowadays electronics tubes are rarely used due to size, weight, heat generation, long-term stability and complex power supply. The quasi-modular design of modern tube amps (one or two series-connected precursors and a final stage) can create different distortions. The precursors are usually with double triodes, such as ECC81, ECC82 and ECC83.
Chance of additional effects such as chorus and tremolo can be integrated. Guitar amps come in various power levels of about 2 watts (Roland Microcube) reaches over 350 watts (Marshall Mode Four) output power. Greater power outputs are not useful in general, as in bigger stage installations, the instruments are transmitted via the PA system.
Variations in sound may also occur when tubes from different manufacturers are used. They produce different sound, even though their nominal data is identical. This is caused by technical tolerances. Another variation is the hybrid amplifier. Since the eighties, the variant is common in the pre-amp tubes. Hybrid amplifiers can unite transistor preamp and tube power amp.
The auditory impression of distorting tube amp is described as dense, loud, rough and groovy. This sound is important in all areas of rock music and a typical guitar sound is a vital part of music styles of hard rock and heavy metal. This is probably due to the well-configured override behavior and the higher internal resistance.
In some cases, digital signal processors (DSPs) are used to simulate the behavior of tube amplifiers on mathematical models. They are also known as modeling amps. Nowadays, there are numerous guitar amplifiers that use this method of sound production. Because of greater flexibility and range of sounds, this amp is replacing the classic guitar amps. Since 2006, a new generation of guitar amp simulators provides many musicians with advanced acoustic capabilities. Some equipment employ high quality analog-to-digital converters, and processors of high computing power. The dynamics of classic guitar amp is simulated with the help of fractal algorithms.
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