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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 ...
Most of the amplifiers produced by ACC were solid-state, but a few models later in production were valve amps. The company is remembered in particular for its Acoustic 361 bass stack, consisting of an Acoustic 360 bass pre-amplifier and one or two Acoustic 361 W-bins, each featuring a built-in 200-watt RMS power amplifier and a rear-facing 18" Cerwin-Vega loudspeaker.
The "auto-correlator" is a multi-band, single-ended dynamic noise filter, as described in U.S. patent 3,989,897. The Phase Linear 1000 audio processor, and the Model 4000 preamplifier, which incorporate the same circuitry, have noise reduction in four frequency bands, one in the bass intended to suppress turntable rumble and three in the treble ...
The fundamental principle of bass management (also called LFE crossover) in surround sound replay systems is that bass content in the incoming signal, irrespective of channel, should be directed only to loudspeakers capable of reproducing it, whether the latter are the main system loudspeakers or one or more subwoofers.
The S-1 speaker system was the crowning achievement for Cerwin-Vega. [citation needed] By utilizing a "Sixth Order Butterworth Vent Tuning" and integrating the system with Cerwin-Vega's DB-10B Bass Turbocharger (included with the S-1 speakers), the low frequency range of the S-1 was increased beyond the capabilities of larger enclosures. Cerwin ...
Acoustic Research was a Cambridge, Massachusetts-based company that manufactured high-end audio equipment. The brand is now owned by VOXX.Acoustic Research was known for the AR-3 series of speaker systems, which used the 12 in (300 mm) acoustic suspension woofer of the AR-1 with newly designed dome mid-range speaker and high-frequency drivers.