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Speaker Asylum General speaker questions for audio and home theater. |
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Speaker Asylum General speaker questions for audio and home theater. |
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In Reply to: Worlds largest subwoofer posted by bradrock1 on July 16, 2008 at 10:48:54:
This website show more photos of it's construction, the room it outputs into, plus the front mains speakers!
According to Royal Device the front LEFT + RIGHT speakers are 8 x LAURA MKII speakers per channel with a total of 16 loudpseakers that are stacked 2 high and 4 wide with a centrally located horn loaded mid/high compression driver!!!
Center channel is made of 6 Laura speakers, in tridimensional stereophony, plus other 2 Lauras speakers as backward channel for HT (upto date removed because used ONLY on stereophonic music). Total 22 speakers.
Scroll down there are lots of nice pictures! Believe it or not but it's often powered by solid state amps but, these solid state amps are S.E. "CLASS A" transformer coupled amplifiers ---{see block diagram above}--- also designed by Royal Device which you can read more about here...
http://www.royaldevice.com/BluBayEng.htm
Total efficiency of the entire AUDIO SYSTEM, not of the SUBWOOFER by itself)) is more than 110 dB/1 watt/1 meter. 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.
Thetubeguy1954
A Rational Subjectivist
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Follow Ups
- Royal Device Of Italy's Horn Subwoofer - thetubeguy1954 13:02:45 07/16/08 (0)
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