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In November 2009, South Africa hosted the South Africa-Nigeria Bi-National Commission in Pretoria. At the conference, it was noted that Oando , an energy conglomerate based in Lagos had recently been listed on the Johannesburg Stock Exchange and the Nigeria-based Dangote Group had invested a record $378 million in South Africa's cement industry.
Visa requirements for South African citizens are administrative entry restrictions by the authorities of other states placed on citizens of South Africa. As of 2024, South African citizens had visa-free or visa on arrival access to 106 countries and territories, ranking the South African passport 47th in the world according to the Henley ...
Visa is also not required for former nationals of Nigeria holding a valid foreign passport together with expired Nigerian passport. Holders of diplomatic or service category passports issued to nationals of Brazil, China, Namibia and South Africa do not require a visa for Nigeria and holders of diplomatic passports issued to nationals of Turkey.
In 1993, the W6-series subwoofer drivers are introduced in 8, 10, 12 and 15-inch sizes. This product was considered unique for its dual 6-ohm voice coil system design. These subwoofers were in production for ten years. In 1994, JL Audio introduces the W4 and IB4 series subwoofers and infinite baffle woofers. Also introduced were the CS-3 ...
A rotary woofer is a subwoofer-style loudspeaker which reproduces very-low-frequency content by using a conventional speaker voice coil's motion to change the pitch (angle) of the blades of an impeller rotating at a constant speed. The pitch of the fan blades is controlled by the audio signal presented to the voice coil, and is able to swing ...
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 ...
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.
Focal Opal 19ti. Focal-JMlab is a French company that has been designing and selling high fidelity audio systems since 1979. Based in Saint-Étienne, the company manufactures loudspeakers for the home, speaker drivers for automobiles, headphones, professional studio monitors, as well as outdoor speakers and those dedicated to yachts.