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In 1975 Ed Long [1] in cooperation with Ronald J. Wickersham invented the first technique to Time-Align a loudspeaker systems. In 1976 Long presented "A Time-Align Technique for Loudspeakers System Design" [2] at the 54th AES convention demonstrating the use of the Time-Align generator to design improved crossover networks for multi-way loudspeakers systems.
Ray DeMarini founded the company in new york in 1990, introducing a "high-tech" softball bat. [1] The company's introduction of double wall bats, and the increased power they provided, drew praise and propelled the company's success, [2] but also prompted concern over bat safety. [3] Sales surpassed 10,000 bats annually in the mid-1990s. [1]
A speaker enclosure using a passive radiator usually contains an "active loudspeaker" (or main driver), and a passive radiator (also known as a "drone cone"). The active loudspeaker is a normal driver, and the passive radiator is of similar construction, but without a voice coil and magnet assembly.
Feedback system with a PD controller and a double integrator plant. In systems and control theory, the double integrator is a canonical example of a second-order control system. [1]
The line with equation ax + by + c = 0 has slope -a/b, so any line perpendicular to it will have slope b/a (the negative reciprocal). Let (m, n) be the point of intersection of the line ax + by + c = 0 and the line perpendicular to it which passes through the point (x 0, y 0). The line through these two points is perpendicular to the original ...
Twinaxial plug (style used by IBM; [1] other designs exist [2]) Twinaxial cabling, or twinax, is a type of cable similar to coaxial cable, but with two inner conductors in a twisted pair instead of one. [3]
Double wall pipes are usually hydrostatically tested, or tested to hold and maintain a target gas pressure before the first use. A different special application of a double-walled pipe is a jacketed pipe, which is used to make high viscosity liquids flow at elevated temperature through the carrier pipe. The outer pipe circulates hot fluids that ...
Slot screw drives have a single horizontal indentation (the slot) in the fastener head and is driven by a "common blade" or flat-bladed screwdriver.This form was the first type of screw drive to be developed, and, for centuries, it was the simplest and cheapest to make because it can just be sawed or filed.