Architecture of Madrid of Music is a work of 1988. In the 21st century, Madrid faces new challenges in its architecture. An old industrial warehouse is the Interpretation Centre of New Technologies, and the CaixaForum Madrid (Herzog & de Meuron) was a former power station. Under the government of Alberto Ruiz-Gallardón the four tallest skyscrapers in Spain were built, and together form the Cuatro Torres Business Area (CTBA). The Manzanares River is crossed by new edge bridges, and work started on the International Convention Centre (Mansilla+Tuñón), an original round building, whose works remain paralyzed by the crisis. Caja Mágica (Dominique Perrault) sport centre
Speaker stands Speaker stands Speaker stands are stands on which loudspeakers are placed with the aim of improving the quality of sound from the speaker. In the 1970s musicians and high fidelity enthusiasts found that lifting speakers off the ground and mounting them on something with no vibration increased sound quality. Ordinary domestic furniture was not built with the properties that would deaden vibrations and so enhance the speaker's sound. Speaker stands, therefore were purpose-built to remove any deleterious colourations that came about through unwanted vibration. Further research has shown that speakers are best positioned so that the tweeter is level with