Dec 31, 2009

World's Biggest Subwoofer

Royal Device has on its own developped and built in Italy the biggest subwoofer of the world for an Audio/Video room that can be also considered as the greatest AUDIO ROOM for private music listening of the world. The Royal Device audio room belongs to Roberto - the audio designer who made it.

The audio reproduction is focused on the speakers output capability more than electric power output of the amplifiers with no need of KWatts power supply lines, releasing more than 110 dB/1W/1 meter sensitivity starting from below 10 Hz focused on the listening position.

SUBWOOFER horns are built underneath the floor in a cavity of 1 meter deep. Each horn is driven by 8 x 18" (47 cm) woofers. A total of 16 woofers.
Each horn is 9.5 meters long and has a floor mouth area of 2.2 square meters and reproduce starting from 10 Hertz FULL POWER. The real mouth area IS NOT the one on the floor. The real mouth have to be considered together with the side vertical frontal panels. The total horn is calculated onto the listening point considering the side walls and the ceiling loadings. This reduces the floor mouth that is not in open air.

The SUBWOOFER efficiency is 120dB/ 1 Watt/1 meter. So the need of external regulation to adapt to the remaining audio system. The total electrical capability of the 16 x 48 cm woofers is about 400 W peak power per woofer that means about 400 x 16 = 6400 W peak total (practically uselss). Each woofer features a 100 mm coil. The real maximum power fed to both subhorn measured with an oscilloscope at the highest musical peak was 6 watts per channel when a pair of tube amps were used to drive the 16 LAuras, while up to date the electric power can reach 60 watts per channel using the 4 x 50watts/ch BLU EYES amps. In this conditions, peak levels are much higher and undistorted than any live concert at all. Walls and ceiling seems to fall down, but fortunately don't. The sound pressure is concentrated at the listening point and stopped by a 2 meters high woolglass anechoic wall on the back of the listening position. We should remember that the total diaphragm surface of the woofers is 2.89 square meters (8.67 square feet) and with the drivers horn loaded (not direct radiating), distortion at 60 watts is practically negligible. If for instance the real maximum rated power (6400 watt) would be used the pressure level would reach 160 dB, but I wonder who could survive. Not even the house built in steel & concrete maybe would stand up.


Dec 29, 2009

World's Hairiest Man - Yu Zhenhuan

Yu Zhenhuan from China is the world's hairiest man with hair covering 96 percent of his body. Yu was diagnosed with a rare condition that causes hair to grow in places it normally shouldn’t. He was born in a farmer family and when he was only 2 years old his parents noticed he had hair coming out of his auditory canals. His situation worsened as he grew up and now almost his entire body is covered with long thick hair.

But Yu might have the chance of living a normal life, he is now undertaking a laser treatment to have his hair removed. Basically, every hair on his body will have to be zapped with laser. That can’t be pleasant, but for Yu Zenhuan it’s nowhere as painful as looking in the mirror.


The Fastest Train - CRH3

The world fastest recently introduced by China has a maximum speed of 245 mph (394 km/h) with an average speed of 217 mph (350 km/h). The train is developed by Siemens, Bombardier and Alstom. According to China Railway minister it is currently the fastest train on the surface of earth.
 China is preparing special speed tracks for this train which will be completed in 2012. 42 different projects of spreading speed lines are currently in progress for the train. After the completion of these new tracks, c The new speed tracks of railways lines will increased from 53,437 miles to 74,564 miles.



Dec 28, 2009

The World’s Tallest Cat - Savannah Cat

The Savannah cat, Scarlett’s Magic is the new Guinness record holder for the world’s tallest cats. She is 18 months old and its length is about 17.1 inches from shoulder to toe.

The adorable pet is also awaiting the result of a second nomination for the world’s longest cat, from the tip of the nose to the end of the tail, but for now she and her owner, Kim Droper, are more than happy with the Guinness World Record for the Tallest Cat.

Miss Droper describes her cat as an obedient and smart one. She also said that the Savannahs are the most beautiful companion for the family. She adds that they are active cats and like to play with family members. She owns the Californian-based Savannah Cat Shoppe, with her husband Lee. This Savannah breed is popular in California because of their beautiful appearances and their great learning abilities.