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Following Seoul and Lyon, the group has announced, it will open a store on Oct. Following the purchase of the Audio Plus Services and Plurison group, a leading distributor of high-end audio equipment in the USA and Canada, VVAG is pursuing its expansion strategy with its network of Focal Powered by Naim stores, where an audio product range without equal anywhere is available. This month, the French and English brands cross the Atlantic and put down roots in Scottsdale, near Phoenix, a dynamic, growing region. Orchestrated with Mike Ware — the head of the LMC Home Entertainment distribution network, which VVAG has worked with for years — this opening is a major milestone in the worldwide distribution of audio equipment that is the benchmark in its field. Focal Powered by Naim in Scottsdale is a space that lives up to the values of Focal and Naim Audio: experience-focused, prestigious, open to the world.

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A subwoofer or sub is a loudspeaker designed to reproduce low-pitched audio frequencies known as bass and sub-bass , lower in frequency than those which can be optimally generated by a woofer.

While the term "subwoofer" technically only refers to the speaker driver, in common parlance, the term often refers to a subwoofer driver mounted in a speaker enclosure cabinet , often with a built-in amplifier. Subwoofers are made up of one or more woofers mounted in a loudspeaker enclosure —often made of wood—capable of withstanding air pressure while resisting deformation.

Subwoofer enclosures come in a variety of designs, including bass reflex with a port or vent , using a subwoofer and one or more passive radiator speakers in the enclosure, acoustic suspension sealed enclosure , infinite baffle , horn-loaded , and bandpass designs, representing unique trade-offs with respect to efficiency, low frequency range, cabinet size and cost.

Passive subwoofers have a subwoofer driver and enclosure and they are powered by an external amplifier. Active subwoofers include a built-in amplifier. The first subwoofers were developed in the s to add bass response to home stereo systems. Subwoofers came into greater popular consciousness in the s with the introduction of Sensurround in movies such as Earthquake , which produced loud low-frequency sounds through large subwoofers.

With the advent of the compact cassette and the compact disc in the s, the easy reproduction of deep and loud bass was no longer limited by the ability of a phonograph record stylus to track a groove, [5] and producers could add more low frequency content to recordings. As well, during the s, DVDs were increasingly recorded with " surround sound " processes that included a low-frequency effects LFE channel, which could be heard using the subwoofer in home theater systems.

During the s, subwoofers also became increasingly popular in home stereo systems , custom car audio installations, and in PA systems. By the s, subwoofers became almost universal in sound reinforcement systems in nightclubs and concert venues. During the s swing era , to get deeper bass, "pipelike opening[s]" were cut into speaker enclosures, creating bass reflex enclosures, as it was found that even a fairly inexpensive speaker enclosure, once modified in this way, could "transmit the driving power of a heavy In September , Raymon Dones, of El Cerrito, California, received the first patent for a subwoofer specifically designed to augment omni-directionally the low frequency range of modern stereo systems US patent Dones's loudspeaker was marketed in the US under the trade name "The Octavium" [10] from the early s to the mids.

The Octavium was utilized by several recording artists of that era, most notably the Grateful Dead , bassist Monk Montgomery , bassist Nathan East , and the Pointer Sisters. The Octavium speaker and Dones's subwoofer technology were also utilized, in a few select theaters, to reproduce low pitch frequencies for the blockbuster movie Earthquake.

Another early subwoofer enclosure made for home and studio use was the separate bass speaker for the Servo Statik 1 by New Technology Enterprises. The SS-1 received very good reviews in from High Fidelity magazine. When Kreisel's business partner, Jonas Miller, who owned a high-end audio store in Los Angeles, told Kreisel that some purchasers of the store's high-end electrostatic speakers had complained about a lack of bass response in the electrostatics, Kreisel designed a powered woofer that would reproduce only those frequencies that were too low for the electrostatic speakers to convey.

The first use of a subwoofer in a recording session was in for mixing the Steely Dan album Pretzel Logic , when recording engineer Roger Nichols arranged for Kreisel to bring a prototype of his subwoofer to Village Recorders.

D'Arcy ; record producer Daniel Levitin served as a consultant and " golden ears " for the design of the crossover network used to partition the frequency spectrum so that the subwoofer would not attempt to reproduce frequencies too high for its effective range, and so that the main speakers would not need to handle frequencies too low for their effective range.

In , Kreisel created the first satellite speakers and subwoofer system, named "David and Goliath". Subwoofers received a great deal of publicity in with the movie Earthquake , which was released in Sensurround.

Initially installed in 17 U. Four of the subwoofers were positioned in front of the audience under or behind the film screen and two more were placed together at the rear of the audience on a platform. The new low frequency entertainment method helped the film become a box office success. More Sensurround systems were assembled and installed. By , there were almost Sensurround systems leapfrogging through select theaters.

In the early s, David Mancuso hired sound engineer Alex Rosner [18] to design additional subwoofers for his disco dance events, along with "tweeter arrays" to "boost the treble and bass at opportune moments" at his private, underground parties at The Loft. By the end of the s, subwoofers were used in dance venue sound systems to enable the playing of "[b]ass-heavy dance music" that we "do not 'hear' with our ears but with our entire body".

By the later s, disco club sound engineers were using the same large Cerwin Vega Sensurround-style folded horn subwoofers that were used in Earthquake and similar movies in dance club system installations.

In Jamaica in the s and s, sound engineers for reggae sound systems began creating "heavily customized" subwoofer enclosures by adding foam and tuning the cabinets to achieve "rich and articulate speaker output below Hz". In sound system culture, there are both "low and high bass bins" in "towering piles" that are "delivered in large trucks" and set up by a crew of "box boys", and then positioned and adjusted by the sound engineer in a process known as "stringing up", all to create the "sound of reggae music you can literally feel as it comes off these big speakers".

In the s, the Bose Acoustimass AM-5 became a popular subwoofer and small high-range satellite speaker system for home listening. In the s, Origin Acoustics developed the first residential in-wall subwoofer named Composer. It used an aluminum 10" driver and a foam-lined enclosure designed to be mounted directly into wall studs during the construction of a new home.

While in the s and s, deep bass speakers were once an exotic commodity owned by audiophiles, by the mids, they were much more popular and widely used, with different sizes and capabilities of sound output. The dancefloor's sound system was based on Richard Long's design at Paradise Garage. The popularity of the CD made it possible to add more low frequency content to recordings and satisfy a larger number of consumers.

In , Damon Krukowski wrote an article entitled "Drop the Bass: A Case Against Subwoofers" for Pitchfork magazine, based on his performing experience with Galaxie ; he argues that "for certain styles of music", especially acoustic music genres, "these low-end behemoths are actually ruining our listening experience" by reducing the clarity of the low end.

Small subwoofer drivers in the 4-inch range are typically used in small computer speaker systems and compact home theatre subwoofer cabinets. The size of the driver and number of drivers in a cabinet depends on the design of the loudspeaker enclosure , the size of the cabinet, the desired sound pressure level, the lowest frequency targeted and the level of permitted distortion. Deep low frequency extension is a common goal for a subwoofer and small box volumes are also considered desirable, to save space and reduce the size for ease of transportation in the case of sound reinforcement and DJ subwoofers.

Hofmann 's "Iron Law" therefore mandates low efficiency under those constraints, and indeed most subwoofers require considerable power, much more than other individual drivers. So for the example of a sealed speaker box, the box volume to achieve a given Q ts is proportional to Vas:. Therefore, a decrease in box volume i. Similarly the F 3 of a speaker is proportional to Fs:. As the efficiency is proportional to Fs 3 , small improvements in low frequency extension with the same driver and box volume will result in very significant reductions in efficiency.

For these reasons, subwoofers are typically very inefficient at converting electrical energy into sound energy. This combination of factors accounts for the higher amplifier power required to drive subwoofers, and the requirement for greater power handling for subwoofer drivers.

Enclosure variations e. Subwoofers have been designed using a number of enclosure approaches: bass reflex , acoustic suspension , infinite baffle , horn loaded , tapped horn , transmission line and bandpass. Each enclosure type has advantages and disadvantages in efficiency increase, bass extension, cabinet size, distortion, and cost.

Subwoofers are typically constructed by mounting one or more woofers in a cabinet of medium-density fibreboard MDF , oriented strand board OSB , plywood, fiberglass, aluminum or other stiff materials. Because of the high air pressure they produce in the cabinet, subwoofer enclosures often require internal bracing to distribute the resulting forces. The smallest subwoofers are typically those designed for desktop multimedia systems.

The largest common subwoofer enclosures are those used for concert sound reinforcement systems or dance club sound systems. Folded horn-type subwoofers can typically produce a deeper range with greater efficiency than the same driver in an enclosure that lacks a horn. However, folded horn cabinets are typically larger and heavier than front-firing enclosures, so folded horns are less commonly used.

Some experimental fixed-installation subwoofer horns have been constructed using brick and concrete to produce a very long horn that allows a very deep sub-bass extension.

Subwoofer output level can be increased by increasing cone surface area or by increasing cone excursion. Since large drivers require undesirably large cabinets, most subwoofer drivers have large excursions.

Unfortunately, high excursion, at high power levels, tends to produce more distortion from inherent mechanical and magnetic effects in electro-dynamic drivers the most common sort. The conflict between assorted goals can never be fully resolved; subwoofer designs necessarily involve tradeoffs and compromises. Hofmann's Iron Law the efficiency of a woofer system is directly proportional to its cabinet volume as in size and to the cube of its cutoff frequency, that is how low in pitch it will go applies to subwoofers just as to all loudspeakers.

The frequency response specification of a speaker describes the range of frequencies or musical tones a speaker can reproduce, measured in hertz Hz. Specifications of frequency response depend wholly for relevance on an accompanying amplitude value—measurements taken with a wider amplitude tolerance will give any loudspeaker a wider frequency response.

Subwoofers also vary in regard to the sound pressure levels achievable and the distortion levels they can produce over their range. Some also include user-adjustable equalization that allows boosted or reduced output at particular frequencies; these vary from a simple "boost" switch, to fully parametric equalizers meant for detailed speaker and room correction. Some such systems are even supplied with a calibrated microphone to measure the subwoofer's in-room response, so the automatic equalizer can correct the combination of subwoofer, subwoofer location, and room response to minimize effects of room modes and improve low frequency performance.

They sometimes incorporate internal passive crossovers, with the filter frequency determined at the factory. These are generally used with third-party power amplifiers, taking their inputs from active crossovers earlier in the signal chain. Inexpensive Home Theatre in a Box packages often come with a passive subwoofer cabinet that is amplified by the multi-channel amplifier.

While few high-end home-theater systems use passive subwoofers, this format is still popular in the professional sound industry. Equalization can be used to adjust the in-room response of a subwoofer system. In addition, many amplifiers include an adjustable low-pass filter, which prevents undesired higher frequencies from reaching the subwoofer driver. The crossover section may also include a high-pass " infrasonic " or "subsonic" filter which prevents the subwoofer driver from attempting to reproduce frequencies below its safe capabilities.

Setting a subsonic filter is important on bass reflex subwoofer cabinets, as the bass reflex design tends to create the risk of cone overexcursion at pitches below those of the port tuning, which can cause distortion and damage the subwoofer driver. Some systems use parametric equalization in an attempt to correct for room frequency response irregularities. Careful positioning of the subwoofer within the room can also help flatten the frequency response.

Changing the relative phase of the subwoofer with respect to the woofers in other speakers may or may not help to minimize unwanted destructive acoustic interference in the frequency region covered by both subwoofer and main speakers. It may not help at all frequencies, and may create further problems with frequency response, but is even so generally provided as an adjustment for subwoofer amplifiers.

Continuously variable phase control circuits are common in subwoofer amplifiers, and may be found in crossovers and as do-it-yourself electronics projects. A similar effect can be achieved with the delay control on many home theater receivers. The subwoofer phase control found on many subwoofer amplifiers is actually a polarity inversion switch.

This type of control allows the subwoofer to either be in phase with the source signal, or degrees out of phase. The subwoofer phase can still be changed by moving the subwoofer closer to or further from the listening position, however this may not be always practical.

Some active subwoofers use a servo feedback mechanism based on cone movement which modifies the signal sent to the voice coil. The servo feedback signal is derived from a comparison of the input signal to the amplifier versus the actual motion of the cone. The usual source of the feedback signal is a few turns of voice coil attached to the cone or a microchip-based accelerometer placed on the cone itself. Servo controlled subwoofers are not the same as Tom Danley 's Servodrive subwoofers whose primary mechanism of sound reproduction avoids the normal voice coil and magnet combination in favor of a high-speed belt-driven servomotor.

The Servodrive design increases output power, reduces harmonic distortion and virtually eliminates power compression , the loss of loudspeaker output that results from an increase in voice coil impedance due to overheating of the voice coil. This feature allows high power operation for extended periods of time. The use of a subwoofer augments the bass capability of the main speakers, and allows them to be smaller without sacrificing low frequency capability.

A subwoofer does not necessarily provide superior bass performance in comparison to large conventional loudspeakers on ordinary music recordings due to the typical lack of very low frequency content on such sources. However, there are recordings with substantial low frequency content that most conventional loudspeakers are ill-equipped to handle without the help of a subwoofer, especially at high playback levels, such as music for pipe organs with 32' 9.

Frequencies which are sufficiently low are not easily localized by humans, hence many stereo and multichannel audio systems feature only one subwoofer channel and a single subwoofer can be placed off-center without affecting the perceived sound stage, since the sound produced will be difficult to localize. The intention in a system with a subwoofer is often to use small main speakers of which there are two for stereo and five or more for surround sound or movie tracks and to hide the subwoofer elsewhere e.

Sound Wave Speaker

When is a deal a deal? Their M. They will tell you that there was a mistake in their inventory system and they have too many units in stock so they have to unload them as soon as possible. And lucky you, the salesman is willing to drop the prices way below the retail price out of desperation. And conveniently enough, the exorbitant Manufacturer Suggested Retail Price MSRP is printed and proudly displayed on the box, usually amounting to thousands of dollars each time.

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Unfortunately Serato has never given the user the ability to use their computers built in speakers when hardware is plugged in. This means when you want to practice, Serato users are forced to plug in speakers to their decks or use headphones. Rename the new device by double clicking on its name, rename it to the exact same name as your controller in the list. Note: You must delete the new aggregate device when you wish to return to controllers audio outputs.

How and Why to Break in your New Speakers

Shop No. This is the combination of five speakers and is well designed to place these at any angle. Offered product is perfectly designed making use of optimum quality material and latest technology following the set industry norms. View Complete Details. Contact Seller Ask for best deal. Get Latest Price Request a quote. Bandra West, Mumbai, Maharashtra. Company Video.

AES E-Library

The good news is your speakers will absolutely sound better after the initial break in period. In fact, you may want to take care of this step right away so you are more quickly able to enjoy your speakers at their best. Essentially, pieces of the assembly like the spider and the surround will be stiff at first. Due to the rigidness of your new speakers, they will not be as dynamic until they have had a chance to move and become more flexible. Moral of the story?

Those super-slim TVs we love usually lack sonic power, not least because of those thin profiles.

Grapevine radio refers to the transmission infrastructures, used for distributing audio programs, which were built to serve a small number of rural upstate South Carolina communities from the early s to the middle s. Despite their name, these systems did not employ radio transmitters, but were actually a type of " telephone newspaper ", because the programs were sent telephonically over wires strung to subscribing homes. The equipment used to distribute programming over a facility's wire network was located at a central site, for example a general store's back room.

Flame Wireless Bluetooth Speaker

Want your speakers to perform at their optimum level straight out of the box? Then look no further for some Cambridge Audio know-how. At Cambridge Audio, we strive to achieve the ultimate performance from every product we offer. Running in your new speakers is a lot like breaking in a recently purchased pair of shoes.

You currently have two options to take advantage of this technology, both of which involve adding more speakers to your current 5. In-ceiling or ceiling mounted speakers firing down at the listening area. Editorial Note About Dolby Atmos Dolby Atmos is a new technology developed by Dolby Laboratories that is said to add an unprecedented degree of realism to movie soundtracks. Dolby Atmos is an object based audio format that allows sound mixers to accurately define the specific location of an audio object in a 3 dimensional listening space. This represents a significant departure from the confines and limitations of channel based audio mixing and playback formats.

How To Run In Speakers

A subwoofer or sub is a loudspeaker designed to reproduce low-pitched audio frequencies known as bass and sub-bass , lower in frequency than those which can be optimally generated by a woofer. While the term "subwoofer" technically only refers to the speaker driver, in common parlance, the term often refers to a subwoofer driver mounted in a speaker enclosure cabinet , often with a built-in amplifier. Subwoofers are made up of one or more woofers mounted in a loudspeaker enclosure —often made of wood—capable of withstanding air pressure while resisting deformation. Subwoofer enclosures come in a variety of designs, including bass reflex with a port or vent , using a subwoofer and one or more passive radiator speakers in the enclosure, acoustic suspension sealed enclosure , infinite baffle , horn-loaded , and bandpass designs, representing unique trade-offs with respect to efficiency, low frequency range, cabinet size and cost. Passive subwoofers have a subwoofer driver and enclosure and they are powered by an external amplifier. Active subwoofers include a built-in amplifier. The first subwoofers were developed in the s to add bass response to home stereo systems.

Mar 4, - I'm very happy with my Decware speakers. I'd heartily recommend Decware for value and quality (especially the build quality of the sub:D }.

An ideal technology for everything from under floor speakers, ceiling speakers and glass speakers. Explore our online resources including digital collections, databases, searchable events calendar and reference assistance. We've been creating established household names and award-winning brands for years, from essential cleaning products to car care, DIY and even fashion and beauty brands. If this speaker works as well as its features suggest it may be able to do, and if the battery doesn't overheat and burn up, it will be the new ultra-small PA speaker standard.

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Divine Signs is the concluding volume of the ethnographic trilogy about the communicative tensions in everyday American cultural life H. Goodall, Jr.

Tokyo studio Nendo have collaborated with a traditional Japanese potter to create a flat, square loudspeaker made of 1mm thick ceramic decorated with intricate patterns. The product was designed in collaboration with Kanazawa based potter Mitsuke Masagasu, for the Take Action Foundation , which seeks to rejuvenate traditional Japanese crafts. See more ceramics in our Dezeen archive. See all our stories on Nendo in our special category. A contribution to the Revalue Nippon Project launched by former Japan footballer Nakata Hidetoshi to revitalize the traditional crafts in Japan.

Car Subwoofers

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Конечно же, все дело в вирусе. Чатрукьян это чувствовал. У него не было сомнений относительно того, что произошло: Стратмор совершил ошибку, обойдя фильтры, и теперь пытался скрыть этот факт глупой версией о диагностике. Чатрукьян не был бы так раздражен, если бы ТРАНСТЕКСТ был его единственной заботой.

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