Above 8 khz the dome diaphragm breaks up causing resonance and harsh metallic sound. Repair your old speaker systems with bms speaker parts. Titled a novel constant directivity horn, this outstanding article is based on. A compression driver is a small specialized diaphragm loudspeaker which generates the sound in. Unique planar wave design patent pending neodymium magnet assembly perfect acoustical coupling of individual units to create virtually continuous line source1 db sensitivity 1 w 1 m 1 khz crossover extended. The bms 4510nd planar wave driver radiates a coherent planar wave front form a rectangular piston without internal diffraction for superior dispertion control and high fidelity sound. Innovation for the loudspeaker industry with voice coil december. Us patent for compression driver phase plug patent patent. The jbl driver is actually very similar to some parts of the bms patent 2 voice coils per d2430k. Bms 4552nd 1 inch high frequency neodymium compression.
Annular diaphragm compression driver for a horn loudspeaker for electroacoustic conversion comprising. Dec 02, 2019 the second test bench characterizes a new bms compression driver, the 1 5530nd. An improved compression driver has a phasing plug with air passages coupling the compression region of the loudspeaker to the throat of the loudspeaker. H 4590 compression driver 2 coaxial compression driver us patent no 5. This coaxial horn arrangement uses the entire front area of the enclosure as the horn mouth for both mid and high frequencies maximizing horn size, and improving directional control at. Afaik the annular polymer diaphragm is a bms invention.
Innovation for the loudspeaker industry with voice coil. This article was originally published in voice coil, december 2019. Most bmss then drain the other subpacks to the voltage of the lowest pack in this example, 4. The compression driver includes an annular diaphragm with a voice coil which is disposed in a magnetic gap of a magnet assembly which supplies a magnetic field to the voice coil. Protection of compression drivers lansing heritage. The unique bms annular diaphragm together with the patented radial phasing plug achieve very high sensitivity and linear frequency response up to 30 khz. Compression module 146 may include a lossless compression utility e. Ive owned several bms pieces, both woofers and compression. The bms mid driver upgrade technicalmodifications the. Bms speakers introduces new coaxial drivers and next. The compression driver also has an annular magnet system unit, which has an annular. The annular diaphragm has a first support portion, a second support portion, a first curved resilient portion, a second curved resilient portion and a voice coil support portion which is disposed between the first and.
The sound waves pass out through an acoustic horn b. Dual diaphragm coaxial planar wave design patent pending rectangular piston of 6. There is no loss of energy required to drive conventional diaphragms. A phase plug for a horn loaded speaker has a frustroconical body with a spherical entrance end and a planer outlet end. The bms 4592ndmid 16ohm driver is the best sounding driver we sell for upgraded klipsch khorn and belle speakers. A compression driver is a small specialized diaphragm loudspeaker which generates the sound in a horn loudspeaker. Huge horns and large format compression drivers from jbl ftw. Bms 911543 is an orally available small molecule targeting a subset of janusassociated kinase jak with potential antineoplastic activity. Bristolmyers squibb has been staring down the barrel of plavixs patent expiration for. Phase plug patents and patent applications class 3843 justia. The sound is less forced, and takes on more of an effortless quality. Jbl versus rcf which russian designer are you talking about here. The voice coil is disposed in the magnetic gap of the magnet assembly.
Merck settles pd1 patent lawsuit with bms and ono pmlive. Compression module 146 may decompress or extract the received provisioning data so that the data may be read and used by other components of bms 20. The second test bench characterizes a new bms compression driver, the 1 5530nd. Search for phase plug patents and patent applications class 3843 filed with the uspto. I believe bms patented this technology in 1997 and patent has has now expired. An auxiliary air passage combines with a plurality of inner primary passages, which may be of the annular, radial or saltshaker form, to couple variations in pressure from the region around the voice coil to the throat of the speaker. Among those are unique patented compression drivers and the remarkable dual diaphragm coaxial planar wave driver, as well as a series of.
Bms911543 is an orally available small molecule targeting a subset of janusassociated kinase jak with potential antineoplastic activity. I wont comment too much on the woofer because it was used in all of them. North reading engineering crossovers klipsch upgrades. Any linked documents and websites are intended only for u. Bristolmyers squibb bristolmyers squibb enters into. Its a dual ring radiator, very similar to the bms compression drivers, except with two diaphragms instead of one. Sep 09, 2014 compression drivers typically have a 10. These are the compression drivers jbl does not offer replacement diaphragms for. Bms 4505nd 5 neodymium planar wave driver, 1,75 vc, 80 w. An annular diaphragm compression driver for electroacoustic conversion has an annular diaphragm, which bears a moving coil, and a compression driver housing with a closed housing base.
The inner support ring has a bottom surface with a first curved groove. The patented design of the bms 4599nd is a result of extensive dedicated research and development, providing dramatic improvement in efficiency, power handling. The bms were much clearer in the 7001200 range than the 10, and were missing the gack or overring that the jbl compression drivers have. A compression driver a in a horn loudspeaker consists of a metal diaphragm blue vibrated by the audio signal current in a coil of wire red between the poles of a cylindrical magnet green.
It is attached to an acoustic horn, a widening duct which serves to radiate the sound efficiently into the air. The bms 4510nd line array driver is for speaker replacement or upgrade. A loudspeaker or loudspeaker or speaker is an electroacoustic transducer. On the audioheritage site forum a site for everything relating to lansing, altec and jbl someone said that the new coaxial jbl drivers on the inside look very much like bms coaxials. Bms 4591 2 middle range compression driver, 3,5 vc, 150 w aes, 118 db 8 ohm. Neodymium compression drivers 57 introduction neodymium planar wave driver the new bms 4510nd planar wave driver radiate a coherent planar wave front from a rectangular piston without internal diffraction for superior dispersion control and high fidelity. The bms 4524 offers all the benefits of the patented bms compression driver design, but at much reduced cost.
Patents, licensing and technology transfer bristol myers squibb. Bms midrange compression drivers klipsch upgrades by volti. Bristol myers squibb is committed to ensuring that its patents do not prevent inexpensive hivaids therapy in subsaharan africa, india and other resourceconstrained countries. The most widely used type of speaker in the 2010s is the dynamic speaker, invented in 1924 by edward w. An annular diaphragm compression driver for electroacoustic conversion has an annular diaphragm. I notice that jbl does not have a patent yet, just an application. The voice coil is wound on the voice coil support portion. The diaphragms are small and are made with polyester, not special expensive metals. Bms has some of the finest high frequency line array compression drivers. Two 8inch lowmid frequency drivers are mounted to the synergy horn along with one 1inch compression driver mounted on a paraline horn element in the el208t. The patented design of the bms 4592 nd is a result of extensive dedicated research and development providing dramatic improvement in dynamic response, clarity and transparency. The midtweet is a patent pending design with extremely wide and smooth dispersion for any driver let alone a 6. The bms was the perfect driver for the pm9060 because it could produce high spl and operate down to the low frequency 600700 hz need to mate with the low frequency bent horn while still having pristine vhf up to about 20khz. Us patent for systems and methods for self provisioning.
The bms 4507nd dual diaphragm coaxial planar wave driver radiates a coherent planar wave front form a rectangular piston without internal diffraction for superior dispersion control and high fidelity sound. Jak2 inhibitor bms911543 selectively inhibits jak2, thereby preventing the jakstat signal transducer and activator of transcription signaling cascade, including activation of stat3. Compression driver with wave guide bms 4510nd, 16 ohm, throat. Ive access to bms compression drivers for 50% off the retail price. Protection of compression drivers whenever a midrange or high frequency corn pression driver is connected directly to a power amplifier, it is recommended that a capacitor be wired in series with the driver in order to attenu ated unwanted low frequency and. By improving some basic flaws in driver design, instead of trying to make a better full diaphragm dome, bms improves the. Foretaget har sedan starten varit mycket innovativt och innehar flera viktiga patent i driverteknologi. Compression driver with wave guide bms 4510nd, 16 ohm. Bms sells some coaxial compression drivers, but the d2430k is different.
Crossover frequencies will be approximately 150hz and 750hz with proper slopes and delays to achieve near linear phase with no fir processing involved. Patents, licensing and technology transfer bristol myers. May 08, 2012 these are the compression drivers jbl does not offer replacement diaphragms for. The compression driver also has an annular magnet system unit, which has an annular magnet gap m and a. They have separate connections but there are not 2 separate drivers each with 2 voice coils. Over 8 khz the dome diaphragm breaks up causing resonance and harsh, metallic sound. Soon we went about replacing all the old drivers and selling them on ebay. Bms 4505nd 5 neodymium planar wave driver, 1,75 vc, 80 w aes, 1 db 16 ohm bms 4505 5 neodymium planar wave driver, 1,75 vc, 80 w aes, 1 db 16 ohm features. Bms 4510nd planar wave high frequency compression driver. The bms patent is under svetly aleksandrov name who is the coowner of coda audio and bms. Bms speakers patented the twoway compression driver technology in 1997. Two phasing plugs may be provided in a dual compression driver.
Opposite the housing base is a sound wave routing element having a sound discharge channel. Combinedtype phase plug, and compression driver and speaker using same. By improving some basic flaws in driver design, instead of trying to make a better full diaphragm dome, bms improves the performance and reduces the cost of manufacturing. Jak2 inhibitor bms 911543 selectively inhibits jak2, thereby preventing the jakstat signal transducer and activator of transcription signaling cascade, including activation of stat3. They have a very clear sound with great definition and detail. They extend down to 300hz, and cover up to 6500hz cleanly. Although the audio quality isnt stellar as of right now its lots of fun to say the least. Phase plug patents and patent applications class 3843.
The compression driver also has an annular magnet system unit, which has an annular magnet gap m and a compression. The open exit end of the sound discharge channel is in slot form and its entry start is annular. While theyre not out in the wild yet, the assumption is theyve been working on it in the background while they waited for the patent to expire, and they cheekily announced it basically the same day as the patent ran out lol. The sound of bms 4552nd is extremely transparent and detailed, it has an exceptional dynamic range and produces even the most complex music signals with depth and definition. The compression driver in the m2 is very interesting. This network was designed by john warren of north reading engineering, based on extensive testing he has done with the vtrac horn, bms 4592 driver, beyma cp25 tweeter, and a klipschorn bass horn. The bms 4599nd dual diaphragm driver incorporates two identical 3. The invention relates to an annular diaphragm compression driver for electroacoustic conversion having an annular diaphragm, which bears at least one moving coil, having a compression driver housing, which a closed housing base, opposite the housing base a sound wave routing element having a sound discharge channel which is open at the end, and having at least one annular magnet system unit.
The achilles heel of this speaker appears to be the compression driver, which becomes quite harsh on dynamic material. The bms annular midrange diaphragm covers the frequency range between 400 and 7000 hz with a smooth linear response. May 06, 2019 the compression driver also has an annular magnet system unit, which has an annular magnet gap m and a compression chamber, adjoining the magnet gap m, for the annular diaphragm. The compression driver also includes an inner support ring and an outer support ring.
The bms 4507nd is a unique transducer that uses a neodymium coaxial compression driver to drive a planar waveguide intended for use in line arrays. The patented bms design remarkably reduces diaphragm weight and inertia. Bmy today announced that it has entered into two separate agreements to license bms986168, an antietau compound in development for progressive supranuclear palsy psp, to biogen. This drain and charge happens several times until the bms senses that all the subpacks are all close enough in voltage to be considered balanced. Protection of compression drivers whenever a midrange or high frequency corn pression driver is connected directly to a power amplifier, it is recommended that a capacitor be wired in series with the driver in order to attenu ated unwanted low frequency and switching transient signals, and to block dc components. The sound from the combination of the bms drivers and the volti horns is effortless, relaxed, and natural. The inventors of the 474 patent showed for the first time that antipd1 antibodies were useful in methods to treat cancer. Bms drivers are in number of jbl boxes but under jbl name.
Neodymium compression drivers 57 introduction neodymium planar wave driver the new bms 4510nd planar wave driver radiate a coherent planar wave front from a rectangular piston without internal diffraction for superior dispersion control and high fidelity sound. Home bms pa loudspeakers bms 2 compression drivers bms 2 compression drivers. Bms 4510nd bms 4510nd 1 planar wave high frequency. This is a 2445j compression driver with what i think may be a jbl 2380a horn together with a pair of 2226h drivers in small sealed. We are involved in several partnerships with governments and ngos, as well as with other innovator and generic pharmaceutical companies who share in our commitment to. The dynamic speaker operates on the same basic principle as a dynamic microphone, but in reverse, to produce. A typical 2 dome compression driver has a limited high frequency response. Bms 4552nd 1 inch high frequency neodymium compression drive. Coax 4592nd is a giant stride and a real point source but there is a problem. Annular diaphragm compression driver bms speakers gmbh.
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