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PCM 90 Amp Rack Units

...r than the 480L, is Lexicon's latest dedicated reverb unit aimed at the higher end of the market.


Yamaha popularised assignable controls with their DX7 synth. (Eh? I thought this was a reverb unit review! <= editor's/reader's voice.). Ever since the DX7 took off, equipment manufacturers have not felt obliged to put more than one or two knobs on anything, from synth modules to reverb units. This is understandable, from a cost point of view, and also from a practical and technological standpoint. More and more features are added to each new model, which remains the same size or smaller than its predecessor. However, there comes a point where the user says "Enough!" This has already happened in the synth market, where Roland now market synths with lots of knobs, switches and sliders alongside their more "modern" units. This is also starting to happen in areas of the outboard effects market, such as the proFusion of valve-based effects and other retro effects such as the Mutronics Mutator. However, reverb and multi-effects units have yet to veer away from their path along the road to assignability hell, and the Lexicon's PCM90 is possibly the worst offender I have encountered! There are two knobs on the front panel, labelled Select and Adjust, and nudge buttons for going up and down in the menus. These are what you use to do almost everything on this unit, and there is an awful lot you can do.

Lexicon Amp Rack Units

Founded in 1971, Lexicon has become one of the world's premier manufacturers of home theater and professional electronics. Innovative technologies, such as LOGIC 7, have helped Lexicon to push the boundaries of home entertainment. Lexicon audio systems are now available in the Rolls Royce Phantom, and LOGIC 7 in models from BMW, Mercedes and Land Rover. Lexicon is a division of Harman Specialty Group.

Reverb - Reverb is an audio effect that reproduces the many echos that occur when a sound is produced in an enclosed space where the sound is reflected repeatedly by the boundaries of the enclosure, even after. Used . the source of the sound stops. The number of echos and the duration of the echos can be varied and with some modern effects units, the shape of the enclosure can be altered as well.. Used . ...

Drivers and Horns - Drivers and Horns are speakers designed to produce high frequency audio usually around 3-5 kHz and up to 20 kHz. Horns are usually in the shape of a long corn and look somewhat like the horn of a mus. Used . ical instrument. . Used . ...

Hertz - A unit of measure for frequency generally applied to waveforms, one Hertz is equal to one cycle in one second. It is abbreviated Hz so that 100 Hz would be 100 cycles per second. However, the unit m. Used . ay be applied to periodic events other than waveforms like the second hand on a clock, which would cycle at 1 Hz, or a human heart that may beat at 1.2 Hz. Named after the German physicist H. Used . einrich Rudolf Hertz, the name was established in 1930, but did not replace the term cycles per second until the 1970s.

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Control Consoles - Lighting consoles are electronic devices used in lighting design to control multiple lighting and staging devices. They can generally control dimmers and many modern consoles can also control automate. Used . d lighting, fog machines, hazers, and other special effects devices. Lighting consoles communicate with the devices in the lighting system with an electronic control protocol, the most common. Used . of which is DMX-512.
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Conventional Lighting - Conventional lighting is made up of stationary lights that can be moved, but only via manual means of adjusting, or focusing the fixture with a yoke.. Used . . Used . ...

Amp Rack Units

Amp rack units refer to an assortment of rack-mounted or rack-protected PA amplification or sound reinforcement equipment that is set up to work with a mixer and loudspeakers. An amplifier, also called a power amplifier, is a basic signal processing unit that increases the power of an audio signal to make the sound from a human voice or music louder. A pro audio amplifier is used in professional sound systems as the last active component in the signal chain because it receives input from mixers or other signal processing units, increases the power of the signal, and sends the output to speakers. There are other types of amplifiers also referred to as amp rack units. A touring amplifier is simply a power amplifier that is designed to withstand conditions that touring musicians are exposed to especially being on the road most of the time. Live power amplifiers are used to support the audio demands of live performances. These amps make help create the unique experience of sound in live concerts. Some amp rack units are built by combining or adding amplifier modules with other parts. These are amplifier sub-units or parts designed to meet certain specifications. To have a whole amplification unit you may need a transformer, bridge rectifiers and filter capacitors, speaker connectors, input connectors, volume control, heatsink and a suitable rack mount case.