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From about 1900 to the 1950s, the "lowest frequency in practical use" in recordings, broadcasting and music playback was 100 Hz. [9] When sound was developed for motion pictures, the basic RCA sound system was a single 8-inch (20 cm) speaker mounted in straight horn, an approach which was deemed unsatisfactory by Hollywood decisionmakers, who hired Western Electric engineers to develop a ...
SE-A1 Amp: Top of the line Technics amp at a cost of US$6,000. SU-A2 Pre-Amp: Top of the line for Technics at a cost of US$8,000. SB-E100 and SB-E200 Loudspeakers: These were both designed with the SB-10000 in mind. The SB-E100 looked like the 10000 with the bass enclosure turned on its end with the mid/tweeter section mounted on top.
Amplifier "heads" may be sold mounted in a wooden cabinet with a carrying handle, or they may be sold as rackmount-able components, which can be screw-mounted in a 19" road case for protection. The speaker enclosures for combo amps and speaker cabinets are typically covered in stiff vinyl, carpet, felt or other sturdy fabric, or painted.
MTX Audio loudspeaker enclosures (with rear panel reflex port tubes) which can mount 15-inch woofers, mid-range drivers and horn and/or compression tweeters. In this photo, only one driver is mounted. A cabinet with loudspeakers mounted in the holes. Number 1 is a mid-range driver. Number 2 is a high-range driver.
Rack-mounted amps are typically housed in road cases to prevent damage to the equipment during transportation. Active loudspeakers have internally mounted amplifiers that have been selected by the manufacturer to match the requirements of the loudspeaker. Some active loudspeakers also have equalization, crossover and mixing circuitry built in.
An active full-range loudspeaker. Powered speakers, also known as self-powered speakers and active speakers, are loudspeakers that have built-in amplifiers.Powered speakers are used in a range of settings, including in sound reinforcement systems (used at live music concerts), both for the main speakers facing the audience and the monitor speakers facing the performers; by DJs performing at ...