Mixer Preamplifier

Mixer Preamplifier

All about Guitar Amplifiers

Guitar amplifiers are electronic amplifiers designed to be used with electronic musical instruments, such as an electric guitar.

Guitar amplifiers are mainly made in two major forms. The combination (or combo) amplifier has the amplifier head and guitar speakers in a single unit. The amplifier head or amp head contains the electronic circuitry constituting the preamp, built in effects processing, and power amplifier.

In the second form, the amplifier head is detached from the speakers, and joined by cables. The separate amplifier is known as an amplifier head, and is normally located on top of one or more loudspeaker enclosures. This separate amplifier head when placed on top of a guitar speaker enclosure or guitar Speaker Cabinet forms an amplifier stack or amp stack.

Instrument amplifiers Types

An extensive range of instrument amplifiers can now be used with the electrical guitar. Some are for general purpose and some designed for specific instruments and even for a definite sound. These comprise: Traditional guitar amplifiers which generate a clean, warm sound a sharp treble roll off at 5 kHz or less and bass roll off at 60 to 100 Hz. It has presets with built in reverb and tremolo (vibrato) units.

These types are often used by traditional rock, blues, and country musicians. Chances are that when on higher volume level the sound can get distorted. So to counter higher end bass amplifiers at times include compressor or limiter features, and an XLR DI output to patch the bass signal directly into a mixing board. To keep the bass amplifiers cool they are often provided with external metal heat sinks or fans.

Keyboard amplifiers, have a low distortion rate and also to make things easy for its functioning it has a simple onboard mixer. This assists the keyboardists to control the tone and level of several keyboards.

Acoustic Guitar amplifiers are intended solely to produce a clean, transparent, acoustic sound when being used with acoustic instruments with built in transducer pickups and microphones.

In addition to a 1 by 4 inch input jack, some instrument amplifiers bear an additional input jack for inserting microphone. This is known easily as it will use a three pin XLR connector. Conversely, phantom power, which is not a necessary for lower end amplifiers, is often provided with the high end versions, so that musicians can use condenser microphones.

Vacuum tube Guitar Amplifier circuit is rather uncomplicated. Two triodes are used in the preamplifier section for obtaining a high signal level to implement any tone controls and drive the following sections. Two more triodes split the phase of the signal and drive the final pentode or beam tetrode (kinkless tetrodes) tubes of the push pull power amplifier stage.

Solid state guitar amplifiers commonly have the quickest response time, even more so than modeling amps. Tubes tend to create warm overdrive sounds instead of cutting the peaked signal off. They more or less pull the peaked audio information back (like natural compression) which creates a fuzzy overdrive sound.

Modeling guitar amplifiers are used to simulate sounds of well known cabinets, guitar amps, and effects. Digital processing is done to obtain this, although there are prevalence analog modeling amps as well, like the Tech 21 Sansamp. Modeling amps characteristically output a wide range of tones and effects, and offers cabinet simulation, which aids the recording without a microphone.

About the Author

Victor Epand is an expert consultant for guitars, drums, and synthesizers. You can find the best marketplace for guitars, drums, and synthesizers at these 3 sites: guitars, guitar amplifiers, drums, drum sets, drum kits, and synthesizers, keyboards.

what is difference between a single and dual channel pre-amplifier?

Is it required to have a mixer and pre-amplifier for a good audio system?what is the difference between mixer and a preamplifier?

I'm assuming you're talking about pro audio, because home audio and HT systems usually don't have mixers... and that means you're talking about microphone pre-amps...

A mixer allows you to mix several - sometimes many - sound sources together to produce one, two, four (or sometimes more) outputs.

Most, but not all, mixers include two or more microphone pre-amps. You can identify these by the XLR female jacks on the channel strips. Mic preamps are needed because the level emitted by a "bare" microphone is extremely low. The preamp boosts it up to what is called "line level." There are actually two different "line levels" in audio work, one for pro gear and one (somewhat lower) for consumer gear, but they're roughly compatible. Anyway, most mixers have several input channels for line level along with several channels that have mic preamps.

In the pro audio world you also find separate mic preamps. These are commonly only used with the better mics in a studio, say the one for your lead singer and for maybe one or two featured instruments - you probably wouldn't use them on your backup singers.

The output of a mic preamp would be fed to a line-level input channel on the mixer.

Dual-channel mic preamps simply have two mic preamps in one enclosure.

I hope this helps.

Mixer Preamplifier

Mixer Preamplifier In The News

A Basic Shure KSM9 Review

A Basic Shure KSM9 Review

The Shure KSM9 microphone is an efficient mic that can record in various frequencies. It is a voice condenser microphone that is able to provide gain prior to feed back. It is a popular microphone used for live stage concerts. It is a dual pattern mic that can be switched between polar patterns. It is a preferred mic by many professional vocalists.

Many live musicians and singers prefer to use the KSM9 for live venues because it provides superior audio sound. The cardioids pick up patterns offer superior sound isolation and gain before feedback with minimum off-axis coloration. The supercardioid pick up pattern provides maximum sound isolation for situations wherein multiple instruments are used and vocalists are close to each other.

It is no wonder that this mic can provide such excellent performance since it is made of components of the highest standards like gold-plated parts. It is flexible to adjust to different performance techniques. It has a discrete pre-amplifier that has no transformer. It responds quickly without distorting the sound.

The unit comes with a shock mount that does not catch wind sounds or breathing, nor picks up handing and stand noise. You will receive the mic in a safe aluminum case that protects the device from damage during transport. The mic produces smoother response and good upper to mid-range sound.

The cartridge is electric based with a frequency response of 50 to 20,000 Hz. Output impendence is 150 ohms. The KSM9 weighs only 300 grams and measures 49 mm in diameter and is 191 mm long. It is the best mic for stage voice performance and can perform well in live environments. It delivers clear articulation and vocal sound.

This microphone is affordable and offers value for your money. Even casual singers can use it. It is one of the best hand-held mics you can get in the market. It comes in champagne and charcoal colors and is available on the internet as well as music stores.

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